2008 NISSAN TIIDA Electrical

EC-7
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DTC P2119 ELECTRIC THROTTLE CON-
TROL ACTUATOR ...........................................
472
Component Description .........................................472
On Board Diagnosis Logic ....................................472
DTC Confirmation Procedure ................................472
Diagnosis Procedure .............................................473
DTC P2122, P2123 APP SENSOR ..................474
Component Description .........................................474
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
474
On Board Diagnosis Logic ....................................474
DTC Confirmation Procedure ................................474
Wiring Diagram .....................................................476
Diagnosis Procedure .............................................477
Component Inspection ..........................................479
Removal and Installation .......................................479
DTC P2127, P2128 APP SENSOR ..................480
Component Description .........................................480
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
480
On Board Diagnosis Logic ....................................480
DTC Confirmation Procedure ................................481
Wiring Diagram .....................................................482
Diagnosis Procedure .............................................483
Component Inspection ..........................................485
Removal and Installation .......................................486
DTC P2135 TP SENSOR .................................487
Component Description .........................................487
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
487
On Board Diagnosis Logic ....................................487
DTC Confirmation Procedure ................................487
Wiring Diagram .....................................................489
Diagnosis Procedure .............................................490
Component Inspection ..........................................492
Removal and Installation .......................................492
DTC P2138 APP SENSOR ...............................493
Component Description .........................................493
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
493
On Board Diagnosis Logic ....................................493
DTC Confirmation Procedure ................................494
Wiring Diagram .....................................................495
Diagnosis Procedure .............................................496
Component Inspection ..........................................499
Removal and Installation .......................................499
DTC P2A00 A/F SENSOR 1 .............................500
Component Description .........................................500
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
500
On Board Diagnosis Logic ....................................500
DTC Confirmation Procedure ................................500
Wiring Diagram .....................................................502
Diagnosis Procedure .............................................503
Removal and Installation .......................................507
ASCD BRAKE SWITCH ..................................508
Component Description .........................................508
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
508
Wiring Diagram ......................................................509
Diagnosis Procedure .............................................510
Component Inspection ...........................................514
ASCD INDICATOR ..........................................516
Component Description .........................................516
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
516
Wiring Diagram ......................................................517
Diagnosis Procedure .............................................517
ELECTRICAL LOAD SIGNAL ........................519
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
519
Diagnosis Procedure .............................................519
FUEL INJECTOR ............................................521
Component Description .........................................521
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
521
Wiring Diagram ......................................................522
Diagnosis Procedure .............................................523
Component Inspection ...........................................525
Removal and Installation .......................................525
FUEL PUMP ....................................................526
Description .............................................................526
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
526
Wiring Diagram ......................................................527
Diagnosis Procedure .............................................528
Component Inspection ...........................................530
Removal and Installation .......................................530
IGNITION SIGNAL ..........................................531
Component Description .........................................531
Wiring Diagram ......................................................532
Diagnosis Procedure .............................................535
Component Inspection ...........................................538
Removal and Installation .......................................540
REFRIGERANT PRESSURE SENSOR ..........541
Component Description .........................................541
Wiring Diagram ......................................................542
Diagnosis Procedure .............................................543
Removal and Installation .......................................545
MIL AND DATA LINK CONNECTOR .............546
Wiring Diagram ......................................................546
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
548
Fuel Pressure ........................................................548
Idle Speed and Ignition Timing ..............................548
Calculated Load Value ..........................................548
Mass Air Flow Sensor ............................................548
Intake Air Temperature Sensor .............................548

EC-16
< SERVICE INFORMATION >
PRECAUTIONS
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001702548
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
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 har-
ness connectors.
Precaution for Procedure without Cowl Top CoverINFOID:0000000001702549
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnosis (OBD) System of Engine and A/T, CVTINFOID:0000000001702550
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) 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 MIL to light up.
• Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL 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-lock-
ing type harness connector. For description and how to disconnect, refer to PG-65
.
• Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL 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 MIL 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.
PIIB3706J

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-47
< SERVICE INFORMATION >
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Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected, and demands the
driver to repair the malfunction.
Emission-related Diagnostic InformationINFOID:0000000001702575
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
×: Applicable —: Not applicable
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)TripMIL lighting
upReference
page CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*4——1 (CVT)
1 (A/T)
2 (M/T)× (CVT)
× (A/T)
— (M/T)EC-143
CAN COMM CIRCUIT U1001
1001*4——2—EC-143
CONTROL UNIT(CAN) U1010 1010 — —1 (CVT)
1 (A/T)
2 (M/T)× (CVT)
× (A/T)
— (M/T)EC-145
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000———
Flashing*5EC-60
INT/V TIM CONT-B1 P0011 0011 — — 2×EC-147
A/F SEN1 HTR (B1) P0031 0031 —×2×EC-151
A/F SEN1 HTR (B1) P0032 0032 —×2×EC-151
HO2S2 HTR (B1) P0037 0037 —×2×EC-156
HO2S2 HTR (B1) P0038 0038 —×2×EC-156
INT/V TIM V/CIR-B1 P0075 0075 — — 2×EC-162
MAF SEN/CIRCUIT P0101 0101 — — 2×EC-167
MAF SEN/CIRCUIT P0102 0102 — — 1×EC-175
MAF SEN/CIRCUIT P0103 0103 — — 1×EC-175
IAT SEN/CIRCUIT P0112 0112 — — 2×EC-182
IAT SEN/CIRCUIT P0113 0113 — — 2×EC-182
ECT SEN/CIRC P0117 0117 — — 1×EC-187
ECT SEN/CIRC P0118 0118 — — 1×EC-187
TP SEN 2/CIRC P0122 0122 — — 1×EC-192
TP SEN 2/CIRC P0123 0123 — — 1×EC-192
ECT SENSOR P0125 0125 — — 1×EC-198
IAT SENSOR P0127 0127 — — 2×EC-201
THERMSTAT FNCTN P0128 0128 — — 2×EC-204
A/F SENSOR1 (B1) P0130 0130 —×2×EC-206
A/F SENSOR1 (B1) P0131 0131 —×2×EC-213
A/F SENSOR1 (B1) P0132 0132 —×2×EC-219
A/F SENSOR1 (B1) P0133 0133××2×EC-225
HO2S2 (B1) P0137 0137××2×EC-233
HO2S2 (B1) P0138 0138××2×EC-240
HO2S2 (B1) P0139 0139××2×EC-250

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-61
< SERVICE INFORMATION >
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When there is an open circuit on MIL circuit, the ECM cannot warn the driver by MIL lighting up when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected, and demands the
driver to repair the malfunction.
MIL Flashing Without DTC
When any SRT codes are not set, MIL may flash without DTC. For the details, refer to EC-47, "Emission-
related Diagnostic Information".
HOW TO SWITCH DIAGNOSTIC TEST MODE
NOTE:
•It is better to count the time accurately with a clock.
•It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
•Always ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.
How to Set Diagnostic Test Mode II (Self-diagnostic Results)
1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MIL starts
blinking.
4. Fully release the accelerator pedal.
Diagnostic Test
ModeKEY and ENG.
Sta tusFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MIL bulb for damage (blown, open
circuit, etc.).
If the MIL does not come on, check MIL circuit.
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When a malfunction is de-
tected twice in two consecutive driving cycles (two trip de-
tection logic), the MIL will light up to inform the driver that a
malfunction has been detected.
The following malfunctions will light up or blink the MIL in
the 1st trip.
• Misfire (Possible three way catalyst damage)
• One trip detection diagnoses
Mode II Ignition switch in
ON position
Engine stoppedSELF-DIAGNOSTIC
RESULTSThis function allows DTCs and 1st trip DTCs to be read.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

BASIC SERVICE PROCEDURE
EC-69
< SERVICE INFORMATION >
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BASIC SERVICE PROCEDURE
Basic InspectionINFOID:0000000001702578
1.INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
- Harness connectors for improper connections
- Wiring harness for improper connections, pinches and cut
- Vacuum hoses for splits, kinks and improper connections
- Hoses and ducts for leaks
- Air cleaner clogging
- Gasket
3. Confirm that electrical or mechanical loads are not applied.
- Headlamp switch is OFF.
- Air conditioner switch is OFF.
- Rear window defogger switch is OFF.
- Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no
load.
6. Make sure that no DTC is displayed with CONSULT-II or GST.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3.
3.CHECK TARGET IDLE SPEED
With CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no load.
SEF983U
SEF976U
SEF977U

BASIC SERVICE PROCEDURE
EC-79
< SERVICE INFORMATION >
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2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel
pressure.
5. Turn ignition switch OFF.
Without CONSULT-II
1. Remove fuel pump fuse (1) located in IPDM E/R (2).
• : Vehicle front
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel
pressure.
4. Turn ignition switch OFF.
5. Reinstall fuel pump fuse after servicing fuel system.
FUEL PRESSURE CHECK
CAUTION:
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:
•Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because C11 models do not have fuel return system.
•The fuel hose connection method used when taking fuel pressure check must not be used for other
purposes.
•Be careful not to scratch or put debris around connection area when servicing, so that the quick
connector maintains sealability with O-rings inside.
•Do not perform fuel pressure check with electrical systems operating (i.e. lights, rear defogger, A/C,
etc.) Fuel pressure gauge may indicate false readings due to varying engine load and changes in
manifold vacuum.
1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".
2. Prepare fuel hose for fuel pressure check B and fuel tube
adapter (KV10118400) D, then connect fuel pressure gauge A.
• : To quick connector
• : To fuel tube (engine side)
• C: Clamp
• Use suitable fuel hose for fuel pressure check (genuine NIS-
SAN fuel hose without quick connector).
• To avoid unnecessary force or tension to hose, use moder-
ately long fuel hose for fuel pressure check.
• Do not use the fuel hose for checking fuel pressure with dam-
age or cracks on it.
• Use Pressure Gauge to check fuel pressure.
3. Remove fuel hose. Refer to EM-18
.
• Do not twist or kink fuel hose because it is plastic hose.
SEF214Y
PBIB2958E
PBIB2982E

EC-84
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
7.PERFORM DATA MONITOR (SPEC) MODE
With CONSULT-II
Make sure that “MAS A/F SE-B1”, “B/FUEL SCHDL”, and “A/F
ALPHA-B1” are within the SP value using CONSULT-II “DATA MON-
ITOR (SPEC)” mode. Refer to EC-127, "
Inspection Procedure".
Are they within the SP value?
Ye s > > G O T O 9 .
No >> GO TO 8.
8.DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Detect malfunctioning part according to EC-127, "
Diagnosis Procedure".
Is malfunctioning part detected?
Ye s > > G O T O 11 .
No >> GO TO 9.
9.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHART
Detect malfunctioning system according to EC-88, "
Symptom Matrix Chart" based on the confirmed symptom
in step 4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 10.
10.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in GI-
25, "How to Perform Efficient Diagnosis for an Electrical Incident".
Is malfunctioning part detected?
Ye s > > G O T O 11 .
No >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT-II. Refer to EC-102, "
ECM Terminal and Reference Value", EC-121, "CONSULT-II Refer-
ence Value in Data Monitor Mode".
11 .REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it, refer to EC-47, "
Emission-related Diagnostic Information".
>> GO TO 12.
12.FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then make sure that the malfunction have been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure
that the symptom is not detected.
OK or NG
NG (DTC*1 is detected)>>GO TO 10.
NG (Symptom remains)>>GO TO 6.
OK >> 1. Before returning the vehicle to the customer, make sure to erase unnecessary DTC*
1 in ECM
and TCM (Transmission Control Module). (Refer to EC-47, "
Emission-related Diagnostic
SEF601Z

EC-88
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
• When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there
is malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected
as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
Symptom Matrix ChartINFOID:0000000001702589
SYSTEM — BASIC ENGINE CONTROL SYSTEM
P0117
P0118Engine coolant temperature
sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning
ignition switch ON or START.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON
or START40°C (104°F)
More than approx. 4 minutes after
ignition ON or START80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cool-
ing fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening
in order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2100
P2103Throttle control relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric throttle control func-
tionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2119 Electric throttle control actu-
ator(When electric throttle control actuator does not function properly due to the return
spring malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to
20 degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in N or P (A/T, CVT), Neutral (M/T) position, and engine speed
will not exceed 1,000 rpm or more.
P2122
P2123
P2127
P2128
P2138Accelerator pedal position
sensorThe ECM controls the electric throttle control actuator in regulating the throttle opening
in order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor. DTC No. Detected items Engine operating condition in fail-safe mode
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut