2005 NISSAN X-TRAIL ignition

CO-6
[QR]
OVERHEATING CAUSE ANALYSIS

Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Power train system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

OVERHEATING CAUSE ANALYSIS
CO-29
[YD22DDTi]
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CO

Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
A
EC

ENGINE CONTROL SYSTEM
QR (WITH EURO-OBD)
INDEX FOR DTC ...................................................... 19
Alphabetical Index .................................................. 19
DTC No. Index ....................................................... 21
PRECAUTIONS ........................................................ 24
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 24
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 24
Precaution .............................................................. 24
Wiring Diagrams and Trouble Diagnosis ................ 27
PREPARATION ......................................................... 28
Special Service Tools ............................................. 28
Commercial Service Tools ...................................... 29
ENGINE CONTROL SYSTEM .................................. 30
System Diagram ..................................................... 30
Vacuum Hose Drawing ........................................... 32
System Chart ......................................................... 34
Multiport Fuel Injection (MFI) System .................... 35
Electronic Ignition (EI) System ............................... 37
Air Conditioning Cut Control ................................... 38
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 38
CAN Communication Unit ...................................... 39
BASIC SERVICE PROCEDURE .............................. 45
Idle Speed and Ignition Timing Check .................... 45
Accelerator Pedal Released Position Learning ...... 46
Throttle Valve Closed Position Learning ................ 47
Idle Air Volume Learning ........................................ 47
Fuel Pressure Check .............................................. 49
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 52
Introduction ............................................................ 52
Two Trip Detection Logic ........................................ 52
Emission-related Diagnostic Information ................ 53
NATS (Nissan Anti-theft System) ........................... 64
Malfunction Indicator (MI) ....................................... 64
OBD System Operation Chart ................................ 67
TROUBLE DIAGNOSIS ............................................ 73
Trouble Diagnosis Introduction ............................... 73DTC Inspection Priority Chart ................................. 77
Fail-Safe Chart ....................................................... 78
Basic Inspection ..................................................... 79
Symptom Matrix Chart ............................................ 84
Engine Control Component Parts Location ............ 88
Circuit Diagram ....................................................... 93
ECM Harness Connector Terminal Layout ............. 95
ECM Terminals and Reference Value ..................... 95
CONSULT-II Function (ENGINE) ..........................103
Generic Scan Tool (GST) Function .......................113
CONSULT-II Reference Value in Data Monitor Mode
.115
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................118
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .120
Description ............................................................120
Testing Condition ..................................................120
Inspection Procedure ............................................120
Diagnostic Procedure ...........................................121
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................124
Description ............................................................124
Diagnostic Procedure ...........................................124
POWER SUPPLY AND GROUND CIRCUIT ...........125
Wiring Diagram .....................................................125
Diagnostic Procedure ...........................................126
Component Inspection ..........................................132
Ground Inspection ................................................132
DTC U1000, U1001 CAN COMMUNICATION LINE .133
Description ............................................................133
On Board Diagnosis Logic ....................................133
DTC Confirmation Procedure ...............................133
Wiring Diagram .....................................................134
Diagnostic Procedure ...........................................135
DTC P0011 IVT CONTROL .....................................136
Description ............................................................136
CONSULT-II Reference Value in Data Monitor Mode
.136
On Board Diagnosis Logic ....................................137

EC-5
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ECA
DTC P1706 PNP SWITCH ...................................... 398
Component Description ........................................ 398
CONSULT-II Reference Value in Data Monitor Mode
. 398
On Board Diagnosis Logic ................................... 398
DTC Confirmation Procedure ............................... 398
Overall Function Check ........................................ 399
Wiring Diagram .................................................... 400
Diagnostic Procedure ........................................... 401
DTC P1720 VSS ..................................................... 403
Description ........................................................... 403
CONSULT-II Reference Value in Data Monitor Mode
. 403
On Board Diagnosis Logic ................................... 403
DTC Confirmation Procedure ............................... 403
Diagnostic Procedure ........................................... 404
DTC P1805 BRAKE SWITCH ................................ 405
Description ........................................................... 405
CONSULT-II Reference Value in Data Monitor Mode
. 405
On Board Diagnosis Logic ................................... 405
FAIL-SAFE MODE ............................................... 405
DTC Confirmation Procedure ............................... 405
Wiring Diagram .................................................... 406
Diagnostic Procedure ........................................... 407
Component Inspection ......................................... 408
DTC P2122, P2123 APP SENSOR ........................ 409
Component Description ........................................ 409
CONSULT-II Reference Value in Data Monitor Mode
. 409
On Board Diagnosis Logic ................................... 409
DTC Confirmation Procedure ............................... 410
Wiring Diagram ..................................................... 411
Diagnostic Procedure ........................................... 413
Component Inspection ......................................... 415
Removal and Installation ...................................... 415
DTC P2127, P2128 APP SENSOR ........................ 416
Component Description ........................................ 416
CONSULT-II Reference Value in Data Monitor Mode
. 416
On Board Diagnosis Logic ................................... 416
DTC Confirmation Procedure ............................... 417
Wiring Diagram .................................................... 418
Diagnostic Procedure ........................................... 420
Component Inspection ......................................... 423
Removal and Installation ...................................... 423
DTC P2135 TP SENSOR ........................................ 424
Component Description ........................................ 424
CONSULT-II Reference Value in Data Monitor Mode
. 424
On Board Diagnosis Logic ................................... 424
DTC Confirmation Procedure ............................... 424
Wiring Diagram .................................................... 426
Diagnostic Procedure ........................................... 428
Component Inspection ......................................... 431
Removal and Installation ...................................... 431
DTC P2138 APP SENSOR ..................................... 432
Component Description ........................................ 432
CONSULT-II Reference Value in Data Monitor Mode .432
On Board Diagnosis Logic ....................................432
DTC Confirmation Procedure ...............................433
Wiring Diagram .....................................................434
Diagnostic Procedure ...........................................436
Component Inspection ..........................................439
Removal and Installation ......................................439
IGNITION SIGNAL ..................................................440
Component Description ........................................440
Wiring Diagram .....................................................441
Diagnostic Procedure ...........................................444
Component Inspection ..........................................449
Removal and Installation ......................................450
INJECTOR CIRCUIT ...............................................451
Component Description ........................................451
CONSULT-II Reference Value in Data Monitor Mode
.451
Wiring Diagram .....................................................452
Diagnostic Procedure ...........................................453
Component Inspection ..........................................456
Removal and Installation ......................................456
VIAS ........................................................................457
Description ............................................................457
CONSULT-II Reference Value in Data Monitor Mode
.458
Wiring Diagram .....................................................459
Diagnostic Procedure ...........................................461
Component Inspection ..........................................464
Removal and Installation ......................................465
FUEL PUMP CIRCUIT ............................................466
Description ............................................................466
CONSULT-II Reference Value in Data Monitor Mode
.466
Wiring Diagram .....................................................467
Diagnostic Procedure ...........................................470
Component Inspection ..........................................473
Removal and Installation ......................................473
REFRIGERANT PRESSURE SENSOR ..................474
Component Description ........................................474
Wiring Diagram .....................................................475
Diagnostic Procedure ...........................................476
Removal and Installation ......................................479
ELECTRICAL LOAD SIGNAL ................................480
CONSULT-II Reference Value in Data Monitor Mode
.480
Wiring Diagram .....................................................481
Diagnostic Procedure ...........................................492
ASCD BRAKE SWITCH .........................................506
Component Description ........................................506
CONSULT-II Reference Value in Data Monitor Mode
.506
Wiring Diagram .....................................................507
Diagnostic Procedure ...........................................508
Component Inspection ..........................................513
ASCD INDICATOR ..................................................514
Component Description ........................................514
CONSULT-II Reference Value in Data Monitor Mode
.514

EC-6 Wiring Diagram .....................................................515
Diagnostic Procedure ...........................................517
MI & DATA LINK CONNECTORS ...........................518
Wiring Diagram .....................................................518
EVAPORATIVE EMISSION SYSTEM .....................522
Description ............................................................522
Component Inspection ..........................................525
POSITIVE CRANKCASE VENTILATION ...............527
Description ............................................................527
Component Inspection ..........................................527
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .529
System Description ...............................................529
Component Description ........................................530
SERVICE DATA AND SPECIFICATIONS (SDS) ....531
Fuel Pressure .......................................................531
Idle Speed and Ignition Timing .............................531
Calculated Load Value ..........................................531
Mass Air Flow Sensor ...........................................531
Intake Air Temperature Sensor .............................531
Engine Coolant Temperature Sensor ...................531
Heated Oxygen Sensor 1 Heater .........................531
Heated Oxygen sensor 2 Heater ..........................532
Crankshaft Position Sensor (POS) .......................532
Camshaft Position Sensor (PHASE) ....................532
Throttle Control Motor ...........................................532
Injector ..................................................................532
Fuel Pump ............................................................532
QR (WITHOUT EURO-OBD)
INDEX FOR DTC .....................................................533
Alphabetical Index ................................................533
DTC No. Index ......................................................535
PRECAUTIONS .......................................................537
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................537
On Board Diagnostic (OBD) System of Engine ....537
Precaution ............................................................537
Wiring Diagrams and Trouble Diagnosis ..............540
PREPARATION .......................................................541
Special Service Tools ...........................................541
Commercial Service Tools ....................................542
ENGINE CONTROL SYSTEM ................................543
System Diagram ...................................................543
Vacuum Hose Drawing .........................................545
System Chart ........................................................547
Multiport Fuel Injection (MFI) System ...................548
Electronic Ignition (EI) System .............................550
Air Conditioning Cut Control .................................551
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................551
CAN Communication Unit .....................................552
BASIC SERVICE PROCEDURE .............................558
Idle Speed and Ignition Timing Check ..................558
Accelerator Pedal Released Position Learning ....559
Throttle Valve Closed Position Learning ...............560
Idle Air Volume Learning ......................................560
Fuel Pressure Check ............................................562ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........565
Introduction ...........................................................565
Two Trip Detection Logic .......................................565
Emission-related Diagnostic Information ..............565
NATS (Nissan Anti-theft System) ..........................567
Malfunction Indicator (MI) .....................................568
TROUBLE DIAGNOSIS ..........................................572
Trouble Diagnosis Introduction .............................572
DTC Inspection Priority Chart ...............................576
Fail-Safe Chart ......................................................577
Basic Inspection ....................................................578
Symptom Matrix Chart ..........................................584
Engine Control Component Parts Location ...........588
Circuit Diagram .....................................................593
ECM Harness Connector Terminal Layout ............595
ECM Terminals and Reference Value ...................595
CONSULT-II Function (ENGINE) ..........................604
CONSULT-II Reference Value in Data Monitor Mode
.615
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................618
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .620
Description ............................................................620
Testing Condition ..................................................620
Inspection Procedure ............................................620
Diagnostic Procedure ............................................621
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................624
Description ............................................................624
Diagnostic Procedure ............................................624
POWER SUPPLY AND GROUND CIRCUIT ...........625
Wiring Diagram .....................................................625
Diagnostic Procedure ............................................626
Component Inspection ..........................................632
Ground Inspection .................................................632
DTC U1000, U1001 CAN COMMUNICATION LINE .633
Description ............................................................633
On Board Diagnosis Logic ....................................633
DTC Confirmation Procedure ................................633
Wiring Diagram .....................................................634
Diagnostic Procedure ............................................635
DTC P0011 IVT CONTROL .....................................636
Description ............................................................636
CONSULT-II Reference Value in Data Monitor Mode
.637
On Board Diagnosis Logic ....................................637
DTC Confirmation Procedure ................................637
Overall Function Check .........................................639
Wiring Diagram .....................................................640
Diagnostic Procedure ............................................641
Component Inspection ..........................................643
Removal and Installation .......................................643
DTC P0102, P0103 MAF SENSOR .........................644
Component Description ........................................644
CONSULT-II Reference Value in Data Monitor Mode
.644
On Board Diagnosis Logic ....................................644
DTC Confirmation Procedure ................................644
Wiring Diagram .....................................................646

EC-9
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ECA
CONSULT-II Reference Value in Data Monitor Mode
. 822
On Board Diagnosis Logic ................................... 822
DTC Confirmation Procedure ............................... 823
Wiring Diagram .................................................... 824
Diagnostic Procedure ........................................... 826
Component Inspection ......................................... 829
Removal and Installation ...................................... 829
DTC P2135 TP SENSOR ........................................ 830
Component Description ........................................ 830
CONSULT-II Reference Value in Data Monitor Mode
. 830
On Board Diagnosis Logic ................................... 830
DTC Confirmation Procedure ............................... 830
Wiring Diagram .................................................... 832
Diagnostic Procedure ........................................... 834
Component Inspection ......................................... 837
Removal and Installation ...................................... 837
DTC P2138 APP SENSOR ..................................... 838
Component Description ........................................ 838
CONSULT-II Reference Value in Data Monitor Mode
. 838
On Board Diagnosis Logic ................................... 838
DTC Confirmation Procedure ............................... 839
Wiring Diagram .................................................... 840
Diagnostic Procedure ........................................... 842
Component Inspection ......................................... 845
Removal and Installation ...................................... 845
HO2S1 HEATER ..................................................... 846
Description ........................................................... 846
CONSULT-II Reference Value in Data Monitor Mode
. 846
Wiring Diagram .................................................... 847
Diagnostic Procedure ........................................... 848
Component Inspection ......................................... 850
Removal and Installation ...................................... 850
HO2S2 HEATER ..................................................... 851
Description ........................................................... 851
CONSULT-II Reference Value in Data Monitor Mode
. 851
Wiring Diagram .................................................... 852
Diagnostic Procedure ........................................... 853
Component Inspection ......................................... 855
Removal and Installation ...................................... 855
IAT SENSOR ........................................................... 856
Component Description ........................................ 856
Wiring Diagram .................................................... 857
Diagnostic Procedure ........................................... 858
Component Inspection ......................................... 860
Removal and Installation ...................................... 860
HO2S1 .................................................................... 861
Component Description ........................................ 861
CONSULT-II Reference Value in Data Monitor Mode
. 861
Wiring Diagram .................................................... 862
Diagnostic Procedure ........................................... 863
Component Inspection ......................................... 865
Removal and Installation ...................................... 866HO2S2 .....................................................................867
Component Description ........................................867
CONSULT-II Reference Value in Data Monitor Mode
.867
Wiring Diagram .....................................................868
Diagnostic Procedure ...........................................869
Component Inspection ..........................................871
Removal and Installation ......................................872
IGNITION SIGNAL ..................................................873
Component Description ........................................873
Wiring Diagram .....................................................874
Diagnostic Procedure ...........................................877
Component Inspection ..........................................882
Removal and Installation ......................................883
EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE .................................................884
Description ............................................................884
CONSULT-II Reference Value in Data Monitor Mode
.884
Wiring Diagram .....................................................885
Diagnostic Procedure ...........................................887
Component Inspection ..........................................890
Removal and Installation ......................................890
INJECTOR CIRCUIT ...............................................891
Component Description ........................................891
CONSULT-II Reference Value in Data Monitor Mode
.891
Wiring Diagram .....................................................892
Diagnostic Procedure ...........................................893
Component Inspection ..........................................896
Removal and Installation ......................................896
VIAS ........................................................................897
Description ............................................................897
CONSULT-II Reference Value in Data Monitor Mode
.898
Wiring Diagram .....................................................899
Diagnostic Procedure ...........................................901
Component Inspection ..........................................904
Removal and Installation ......................................905
FUEL PUMP CIRCUIT ............................................906
Description ............................................................906
CONSULT-II Reference Value in Data Monitor Mode
.906
Wiring Diagram .....................................................907
Diagnostic Procedure ...........................................910
Component Inspection ..........................................913
Removal and Installation ......................................913
REFRIGERANT PRESSURE SENSOR ..................914
Component Description ........................................914
Wiring Diagram .....................................................915
Diagnostic Procedure ...........................................916
Removal and Installation ......................................919
ELECTRICAL LOAD SIGNAL ................................920
CONSULT-II Reference Value in Data Monitor Mode
.920
Wiring Diagram .....................................................921
Diagnostic Procedure ...........................................932
ASCD BRAKE SWITCH .........................................946
Component Description .......................................

EC-10 CONSULT-II Reference Value in Data Monitor Mode
.946
Wiring Diagram .....................................................947
Diagnostic Procedure ...........................................948
Component Inspection ..........................................953
ASCD INDICATOR ..................................................954
Component Description ........................................954
CONSULT-II Reference Value in Data Monitor Mode
.954
Wiring Diagram .....................................................955
Diagnostic Procedure ...........................................957
MI & DATA LINK CONNECTORS ...........................958
Wiring Diagram .....................................................958
EVAPORATIVE EMISSION SYSTEM .....................962
Description ............................................................962
Component Inspection ..........................................965
POSITIVE CRANKCASE VENTILATION ...............967
Description ............................................................967
Component Inspection ..........................................967
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .969
System Description ...............................................969
Component Description ........................................970
SERVICE DATA AND SPECIFICATIONS (SDS) ....971
Fuel Pressure .......................................................971
Idle Speed and Ignition Timing .............................971
Mass Air Flow Sensor ...........................................971
Intake Air Temperature Sensor .............................971
Engine Coolant Temperature Sensor ...................971
Heated Oxygen Sensor 1 Heater .........................971
Heated Oxygen sensor 2 Heater ..........................971
Crankshaft Position Sensor (POS) .......................971
Camshaft Position Sensor (PHASE) ....................972
Throttle Control Motor ...........................................972
Injector ..................................................................972
Fuel Pump ............................................................972
YD (WITH EURO-OBD)
INDEX FOR DTC .....................................................973
Alphabetical Index ................................................973
DTC No. Index ......................................................976
PRECAUTIONS .......................................................979
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................979
On Board Diagnostic (OBD) System of Engine ....979
Precautions ...........................................................979
Wiring Diagrams and Trouble Diagnosis ..............982
PREPARATION .......................................................983
Special Service Tools ...........................................983
Commercial Service Tools ....................................983
ENGINE CONTROL SYSTEM ................................984
System Diagram ...................................................984
Vacuum Hose Drawing .........................................985
System Chart ........................................................986
Fuel Injection Control System ...............................986
Fuel Injection Timing Control System ...................988
Air Conditioning Cut Control .................................988
Fuel Cut Control (At No Load & High Engine Speed) .988Crankcase Ventilation System ..............................989
CAN Communication ............................................989
BASIC SERVICE PROCEDURE .............................994
Fuel Filter ..............................................................994
Fuel Pump Learning Value Clearing .....................994
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........996
Introduction ...........................................................996
Three Trip Detection Logic and One Trip Detection
Logic .....................................................................996
Emission-related Diagnostic Information ..............996
NATS (Nissan Anti-theft System) .........................1001
Malfunction Indicator (MI) ....................................1001
OBD System Operation Chart ..............................1004
TROUBLE DIAGNOSIS .........................................1007
Trouble Diagnosis Introduction ............................1007
DTC Inspection Priority Chart ..............................1010
Basic Inspection ...................................................1012
Symptom Matrix Chart .........................................1016
Engine Control Component Parts Location ..........1020
Circuit Diagram ....................................................1025
ECM Harness Connector Terminal Layout ...........1027
ECM Terminals And Reference Value ..................1027
CONSULT-II Function (ENGINE) .........................1034
Generic Scan Tool (GST) Function ......................1040
CONSULT-II Reference Value in Data Monitor Mode
1042
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................1043
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ......................................................................1045
Description ...........................................................1045
Diagnostic Procedure ...........................................1045
POWER SUPPLY AND GROUND CIRCUIT ..........1046
Wiring Diagram ....................................................1046
Diagnostic Procedure ...........................................1047
Component Inspection .........................................1054
Ground Inspection ................................................1055
DTC U1000 CAN COMMUNICATION LINE ...........1056
Description ...........................................................1056
On Board Diagnosis Logic ...................................1056
DTC Confirmation Procedure ...............................1056
Wiring Diagram ....................................................1057
Diagnostic Procedure ...........................................1058
DTC P0016 CKP - CMP CORRELATION ..............1059
On Board Diagnosis Logic ...................................1059
DTC Confirmation Procedure ...............................1059
Diagnostic Procedure ...........................................1059
DTC P0045 TC BOOST CONTROL SOLENOID
VALVE .....................................................................1061
Description ...........................................................1061
On Board Diagnosis Logic ...................................1061
DTC Confirmation Procedure ...............................1061
Wiring Diagram ....................................................1062
Diagnostic Procedure ...........................................1063
Component Inspection .........................................1064
DTC P0088 FUEL SYSTEM ...................................1066
On Board Diagnosis Logic ...................................1066
DTC Confirmation Procedure ...............................1066

EC-24
[QR (WITH EURO-OBD)]
PRECAUTIONS

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS010L0
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
On Board Diagnostic (OBD) System of Engine and A/TEBS010L1
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of
a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the battery ground cable before any repair
or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will
cause the MI to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-74, "
HAR-
NESS CONNECTOR" .

Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MI to light up due to the short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to the malfunction of the fuel injection system, etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionEBS010L2

Always use a 12 volt battery as power source.

Do not attempt to disconnect battery cables while engine is
running.

Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect battery
ground cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned OFF.

Before removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF289H