GI-16
HOW TO USE THIS MANUAL
Optional Splice
DESCRIPTION
SGI942
Num-
berItem Description
1 Power condition
This shows the condition when the system receives battery positive voltage (can be oper-
ated).
2 Fusible link
The double line shows that this is a fusible link.
The open circle shows current flow in, and the shaded circle shows current flow out.
3Fusible link/fuse loca-
tion
This shows the location of the fusible link or fuse in the fusible link or fuse box. For arrange-
ment, refer to PG section, POWER SUPPLY ROUTING.
4Fuse
The single line shows that this is a fuse.
The open circle shows current flow in, and the shaded circle shows current flow out.
5 Current rating
This shows the current rating of the fusible link or fuse.
6 Connectors
This shows that connector E3 is female and connector M1 is male.
The G/R wire is located in the 1A terminal of both connectors.
Terminal number with an alphabet (1A, 5B, etc.) indicates that the connector is SMJ connec-
tor. Refer to PG section, SMJ (SUPER MULTIPLE JUNCTION).
7 Optional splice
The open circle shows that the splice is optional depending on vehicle application.
8 Splice
The shaded circle shows that the splice is always on the vehicle.
9 Page crossing
This arrow shows that the circuit continues to an adjacent page.
The A will match with the A on the preceding or next page.
10 Common connector
The dotted lines between terminals show that these terminals are part of the same connector.
11 Option abbreviation
This shows that the circuit is optional depending on vehicle application.
12 Relay
This shows an internal representation of the relay. For details, refer to PG section, STAN-
DARDIZED RELAY.
13 Connectors
This shows that the connector is connected to the body or a terminal with bolt or nut.
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SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Heat sensitive
Freezing
Water intrusion
Electrical load
Cold or hot start up
Get a thorough description of the incident from the customer. It is important for simulating the conditions of the
problem.
Vehicle Vibration
The problem may occur or become worse while driving on a rough road or when engine is vibrating (idle with
A/C on). In such a case, you will want to check for a vibration related condition. Refer to the following illustra-
tion.
CONNECTORS & HARNESS
Determine which connectors and wiring harness would affect the electrical system you are inspecting. Gently
shake each connector and harness while monitoring the system for the incident you are trying to duplicate.
This test may indicate a loose or poor electrical connection.
HINT
Connectors can be exposed to moisture. It is possible to get a thin film of corrosion on the connector termi-
nals. A visual inspection may not reveal this without disconnecting the connector. If the problem occurs inter-
mittently, perhaps the problem is caused by corrosion. It is a good idea to disconnect, inspect and clean the
terminals on related connectors in the system.
SENSORS & RELAYS
Gently apply a slight vibration to sensors and relays in the system you are inspecting.
This test may indicate a loose or poorly mounted sensor or relay.
ENGINE COMPARTMENT
There are several reasons a vehicle or engine vibration could cause an electrical complaint. Some of the
things to check for are:
Connectors not fully seated.
Wiring harness not long enough and is being stressed due to engine vibrations or rocking.
Wires laying across brackets or moving components.
Loose, dirty or corroded ground wires.
Wires routed too close to hot components.
To inspect components under the hood, start by verifying the integrity of ground connections. (Refer to Ground
Inspection described later.) First check that the system is properly grounded. Then check for loose connection
by gently shaking the wiring or components as previously explained. Using the wiring diagrams inspect the
wiring for continuity.
BEHIND THE INSTRUMENT PANEL
An improperly routed or improperly clamped harness can become pinched during accessory installation. Vehi-
cle vibration can aggravate a harness which is routed along a bracket or near a screw.
SGI839
GI-26
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Cold or Hot Start Up
On some occasions an electrical incident may occur only when the car is started cold, or it may occur when
the car is restarted hot shortly after being turned off. In these cases you may have to keep the car overnight to
make a proper diagnosis.
CIRCUIT INSPECTION
Introduction
In general, testing electrical circuits is an easy task if it is approached in a logical and organized method.
Before beginning it is important to have all available information on the system to be tested. Also, get a thor-
ough understanding of system operation. Then you will be able to use the appropriate equipment and follow
the correct test procedure.
You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring har-
ness or electrical component to do this.
NOTE:
Refer to “How to Check Terminal” to probe or check terminal.
Testing for “Opens” in the Circuit
Before you begin to diagnose and test the system, you should rough sketch a schematic of the system. This
will help you to logically walk through the diagnosis process. Drawing the sketch will also reinforce your work-
ing knowledge of the system.
CONTINUITY CHECK METHOD
The continuity check is used to find an open in the circuit. The digital multimeter (DMM) set on the resistance
function will indicate an open circuit as over limit (no beep tone or no ohms symbol). Make sure to always start
with the DMM at the highest resistance level.
To help in understanding the diagnosis of open circuits, please refer to the previous schematic.
Disconnect the battery negative cable.
Start at one end of the circuit and work your way to the other end. (At the fuse block in this example)
Connect one probe of the DMM to the fuse block terminal on the load side.
Connect the other probe to the fuse block (power) side of SW1. Little or no resistance will indicate that
portion of the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an
over limit or infinite resistance condition. (point A)
Connect the probes between SW1 and the relay. Little or no resistance will indicate that portion of the cir-
cuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or infi-
nite resistance condition. (point B)
Connect the probes between the relay and the solenoid. Little or no resistance will indicate that portion of
the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or
infinite resistance condition. (point C)
Any circuit can be diagnosed using the approach in the previous example.
OPENA circuit is open when there is no continuity through a section of the circuit.
SHORTThere are two types of shorts.
SHORT CIRCUITWhen a circuit contacts another circuit and causes the normal resistance to
change.
SHORT TO GROUND When a circuit contacts a ground source and grounds the circuit.
SGI846-A
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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VOLTAGE CHECK METHOD
To help in understanding the diagnosis of open circuits please refer to the previous schematic.
In any powered circuit, an open can be found by methodically checking the system for the presence of voltage.
This is done by switching the DMM to the voltage function.
Connect one probe of the DMM to a known good ground.
Begin probing at one end of the circuit and work your way to the other end.
With SW1 open, probe at SW1 to check for voltage.
voltage; open is further down the circuit than SW1.
no voltage; open is between fuse block and SW1 (point A).
Close SW1 and probe at relay.
voltage; open is further down the circuit than the relay.
no voltage; open is between SW1 and relay (point B).
Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the previous example.
Testing for “Shorts” in the Circuit
To simplify the discussion of shorts in the system, please refer to the following schematic.
RESISTANCE CHECK METHOD
Disconnect the battery negative cable and remove the blown fuse.
Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the
fuse.
Connect one probe of the DMM to the load side of the fuse terminal. Connect the other probe to a known
good ground.
With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.
Close SW1 and disconnect the relay. Put probes at the load side of fuse terminal and a known good
ground. Then, check for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.
Close SW1 and jump the relay contacts with jumper wire. Put probes at the load side of fuse terminal and
a known good ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.
VOLTAGE CHECK METHOD
Remove the blown fuse and disconnect all loads (i.e. SW1 open, relay disconnected and solenoid discon-
nected) powered through the fuse.
Turn the ignition key to the ON or START position. Verify battery voltage at the battery + side of the fuse
terminal (one lead on the battery + terminal side of the fuse block and one lead on a known good ground).
With SW1 open and the DMM leads across both fuse terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
SGI847-A
GI-28
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
no voltage; short is further down the circuit than SW1.
With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check
for voltage.
voltage; short is between SW1 and the relay (point B).
no voltage; short is further down the circuit than the relay.
With SW1 closed, relay contacts jumped with fused jumper wire check for voltage.
voltage; short is down the circuit of the relay or between the relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
Remove the ground bolt or screw.
Inspect all mating surfaces for tarnish, dirt, rust, etc.
Clean as required to assure good contact.
Reinstall bolt or screw securely.
Inspect for “add-on” accessories which may be interfering with the ground circuit.
If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the
wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one
eyelet make sure no ground wires have excess wire insulation.
For detailed ground distribution information, refer to “Ground Distribution” in PG section.
Voltage Drop Tests
Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage
drop in a circuit is caused by a resistance when the circuit is in operation.
Check the wire in the illustration. When measuring resistance with DMM, contact by a single strand of wire will
give reading of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand of wire
is not able to carry the current. The single strand will have a high resistance to the current. This will be picked
up as a slight voltage drop.
Unwanted resistance can be caused by many situations as follows:
Undersized wiring (single strand example)
Corrosion on switch contacts
Loose wire connections or splices.
SGI853
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DTC P0172 FUEL INJECTION SYSTEM FUNCTION . 223
On Board Diagnosis Logic ................................... 223
DTC Confirmation Procedure ............................... 223
Wiring Diagram .................................................... 225
Diagnostic Procedure ........................................... 226
DTC P0222, P0223 TP SENSOR ........................... 229
Component Description ........................................ 229
CONSULT-II Reference Value in Data Monitor Mode
. 229
On Board Diagnosis Logic ................................... 229
DTC Confirmation Procedure ............................... 229
Wiring Diagram .................................................... 231
Diagnostic Procedure ........................................... 233
Component Inspection ......................................... 236
Removal and Installation ...................................... 236
DTC P0300 - P0304 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 4 CYLINDER MISFIRE ..................... 237
On Board Diagnosis Logic ................................... 237
DTC Confirmation Procedure ............................... 237
Diagnostic Procedure ........................................... 238
DTC P0327, P0328 KS ........................................... 242
Component Description ........................................ 242
On Board Diagnosis Logic ................................... 242
DTC Confirmation Procedure ............................... 242
Wiring Diagram .................................................... 243
Diagnostic Procedure ........................................... 244
Component Inspection ......................................... 246
Removal and Installation ...................................... 246
DTC P0335 CKP SENSOR (POS) .......................... 247
Component Description ........................................ 247
CONSULT-II Reference Value in Data Monitor Mode
. 247
On Board Diagnosis Logic ................................... 247
DTC Confirmation Procedure ............................... 247
Wiring Diagram .................................................... 248
Diagnostic Procedure ........................................... 250
Component Inspection ......................................... 252
Removal and Installation ...................................... 253
DTC P0340 CMP SENSOR (PHASE) ..................... 254
Component Description ........................................ 254
On Board Diagnosis Logic ................................... 254
DTC Confirmation Procedure ............................... 254
Wiring Diagram .................................................... 255
Diagnostic Procedure ........................................... 256
Component Inspection ......................................... 259
Removal and Installation ...................................... 260
DTC P0420 THREE WAY CATALYST FUNCTION . 261
On Board Diagnosis Logic ................................... 261
DTC Confirmation Procedure ............................... 261
Overall Function Check ........................................ 262
Diagnostic Procedure ........................................... 263
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ..................... 265
Description ........................................................... 265
CONSULT-II Reference Value in Data Monitor Mode
. 265
On Board Diagnosis Logic ................................... 266
DTC Confirmation Procedure ............................... 266
Wiring Diagram .................................................... 267Diagnostic Procedure ...........................................269
Component Inspection ..........................................271
Removal and Installation ......................................271
DTC P0500 VSS ......................................................272
Description ............................................................272
On Board Diagnosis Logic ....................................272
DTC Confirmation Procedure ...............................272
Overall Function Check ........................................272
Diagnostic Procedure ...........................................273
DTC P0550 PSP SENSOR .....................................274
Component Description ........................................274
CONSULT-II Reference Value in Data Monitor Mode
.274
On Board Diagnosis Logic ....................................274
DTC Confirmation Procedure ...............................274
Wiring Diagram .....................................................275
Diagnostic Procedure ...........................................276
Component Inspection ..........................................278
Removal and Installation ......................................278
DTC P0605 ECM .....................................................279
Component Description ........................................279
On Board Diagnosis Logic ....................................279
DTC Confirmation Procedure ...............................279
Diagnostic Procedure ...........................................280
DTC P1065 ECM POWER SUPPLY .......................282
Component Description ........................................282
On Board Diagnosis Logic ....................................282
DTC Confirmation Procedure ...............................282
Wiring Diagram .....................................................283
Diagnostic Procedure ...........................................284
DTC P1111 IVT CONTROL SOLENOID VALVE .....286
Component Description ........................................286
CONSULT-II Reference Value in Data Monitor Mode
.286
On Board Diagnosis Logic ....................................286
DTC Confirmation Procedure ...............................286
Wiring Diagram .....................................................287
Diagnostic Procedure ...........................................288
Component Inspection ..........................................289
Removal and Installation ......................................289
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR .............................................................290
Component Description ........................................290
On Board Diagnosis Logic ....................................290
DTC Confirmation Procedure ...............................290
Diagnostic Procedure ...........................................291
Removal and Installation ......................................291
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION ..............................................................292
Description ............................................................292
On Board Diagnosis Logic ....................................292
DTC Confirmation Procedure ...............................292
Wiring Diagram .....................................................293
Diagnostic Procedure ...........................................297
Component Inspection ..........................................300
Removal and Installation ......................................301
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .....................................................................302
Component Description ........................................302
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Component Inspection ......................................... 622
Removal and Installation ...................................... 624
DTC P0222, P0223 TP SENSOR ........................... 625
Component Description ........................................ 625
CONSULT-II Reference Value in Data Monitor Mode
. 625
On Board Diagnosis Logic ................................... 625
DTC Confirmation Procedure ............................... 625
Wiring Diagram .................................................... 627
Diagnostic Procedure ........................................... 629
Component Inspection ......................................... 632
Removal and Installation ...................................... 632
DTC P0327, P0328 KS ........................................... 633
Component Description ........................................ 633
On Board Diagnosis Logic ................................... 633
DTC Confirmation Procedure ............................... 633
Wiring Diagram .................................................... 634
Diagnostic Procedure ........................................... 635
Component Inspection ......................................... 637
Removal and Installation ...................................... 637
DTC P0335 CKP SENSOR (POS) .......................... 638
Component Description ........................................ 638
CONSULT-II Reference Value in Data Monitor Mode
. 638
On Board Diagnosis Logic ................................... 638
DTC Confirmation Procedure ............................... 638
Wiring Diagram .................................................... 640
Diagnostic Procedure ........................................... 642
Component Inspection ......................................... 644
Removal and Installation ...................................... 645
DTC P0340 CMP SENSOR (PHASE) ..................... 646
Component Description ........................................ 646
On Board Diagnosis Logic ................................... 646
DTC Confirmation Procedure ............................... 646
Wiring Diagram .................................................... 648
Diagnostic Procedure ........................................... 649
Component Inspection ......................................... 653
Removal and Installation ...................................... 653
DTC P0500 VSS ..................................................... 654
Description ........................................................... 654
On Board Diagnosis Logic ................................... 654
DTC Confirmation Procedure ............................... 654
Overall Function Check ........................................ 655
Diagnostic Procedure ........................................... 655
DTC P0550 PSP SENSOR ..................................... 656
Component Description ........................................ 656
CONSULT-II Reference Value in Data Monitor Mode
. 656
On Board Diagnosis Logic ................................... 656
DTC Confirmation Procedure ............................... 656
Wiring Diagram .................................................... 657
Diagnostic Procedure ........................................... 658
Component Inspection ......................................... 660
Removal and Installation ...................................... 660
DTC P0605 ECM .................................................... 661
Component Description ........................................ 661
On Board Diagnosis Logic ................................... 661
DTC Confirmation Procedure ............................... 661
Diagnostic Procedure ........................................... 663DTC P1065 ECM POWER SUPPLY .......................664
Component Description ........................................664
On Board Diagnosis Logic ....................................664
DTC Confirmation Procedure ...............................664
Wiring Diagram .....................................................665
Diagnostic Procedure ...........................................666
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR .............................................................668
Component Description ........................................668
On Board Diagnosis Logic ....................................668
DTC Confirmation Procedure ...............................668
Diagnostic Procedure ...........................................669
Removal and Installation ......................................670
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION ..............................................................671
Description ............................................................671
On Board Diagnosis Logic ....................................671
DTC Confirmation Procedure ...............................671
Wiring Diagram .....................................................673
Diagnostic Procedure ...........................................677
Component Inspection ..........................................680
Removal and Installation ......................................681
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .....................................................................682
Component Description ........................................682
CONSULT-II Reference Value in Data Monitor Mode
.682
On Board Diagnosis Logic ....................................682
DTC Confirmation Procedure ...............................682
Wiring Diagram .....................................................684
Diagnostic Procedure ...........................................687
Component Inspection ..........................................689
DTC P1128 THROTTLE CONTROL MOTOR .........690
Component Description ........................................690
On Board Diagnosis Logic ....................................690
DTC Confirmation Procedure ...............................690
Wiring Diagram .....................................................691
Diagnostic Procedure ...........................................695
Component Inspection ..........................................696
Removal and Installation ......................................697
DTC P1211 TCS CONTROL UNIT ..........................698
Description ............................................................698
On Board Diagnosis Logic ....................................698
DTC Confirmation Procedure ...............................698
Diagnostic Procedure ...........................................698
DTC P1212 TCS COMMUNICATION LINE ............699
Description ............................................................699
On Board Diagnosis Logic ....................................699
DTC Confirmation Procedure ...............................699
Diagnostic Procedure ...........................................699
DTC P1217 ENGINE OVER TEMPERATURE ........700
System Description ...............................................700
CONSULT-II Reference Value in Data Monitor Mode
.700
On Board Diagnosis Logic ....................................701
Overall Function Check ........................................701
Wiring Diagram .....................................................704
Diagnostic Procedure ...........................................707
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Wiring Diagram .................................................... 994
Diagnostic Procedure ........................................... 995
Removal and Installation ...................................... 996
DTC P0192, P0193 FRP SENSOR ......................... 997
Description ........................................................... 997
CONSULT-II Reference Value in Data Monitor Mode
. 997
ECM Terminals and Reference Value .................. 997
On Board Diagnosis Logic ................................... 997
DTC Confirmation Procedure ............................... 998
Wiring Diagram .................................................... 999
Diagnostic Procedure ..........................................1000
Component Inspection ........................................1002
Removal and Installation .....................................1002
DTC P0200 FUEL INJECTOR ...............................1003
On Board Diagnosis Logic ..................................1003
DTC Confirmation Procedure ..............................1003
Diagnostic Procedure ..........................................1003
DTC P0201 - P0204 FUEL INJECTOR .................1005
Component Description .......................................1005
CONSULT-II Reference Value in Data Monitor Mode
1005
ECM Terminals and Reference Value .................1005
On Board Diagnosis Logic ..................................1006
DTC Confirmation Procedure ..............................1007
Wiring Diagram ...................................................1008
Diagnostic Procedure ..........................................1009
Component Inspection ........................................1010
Removal and Installation .....................................1010
DTC P0217 ENGINE OVER TEMPERATURE ......1011
System Description .............................................1011
CONSULT-II Reference Value in Data Monitor Mode
1011
ECM Terminals and Reference Value .................1011
On Board Diagnosis Logic ..................................1012
Overall Function Check .......................................1012
Wiring Diagram ...................................................1014
Diagnostic Procedure ..........................................1015
Main 12 Causes of Overheating ..........................1023
Component Inspection ........................................1024
DTC P0222, P0223 APP SENSOR .......................1025
Description ..........................................................1025
CONSULT-II Reference Value in Data Monitor Mode
1025
ECM Terminals and Reference Value .................1025
On Board Diagnosis Logic ..................................1026
DTC Confirmation Procedure ..............................1026
Wiring Diagram ...................................................1027
Diagnostic Procedure ..........................................1028
Component Inspection ........................................1030
Removal and Installation .....................................1030
DTC P0234 TC SYSTEM .......................................1031
Description ..........................................................1031
ECM Terminal and Reference Value ...................1031
On Board Diagnosis Logic ..................................1032
Overall Function Check .......................................1032
Wiring Diagram ...................................................1033
Diagnostic Procedure ..........................................1034
Component Inspection ........................................1037DTC P0237, P0238 TC BOOST SENSOR .............1038
Component Description .......................................1038
CONSULT-II Reference Value in Data Monitor Mode
1038
ECM Terminals and Reference Value ..................1038
On Board Diagnosis Logic ...................................1039
DTC Confirmation Procedure ..............................1039
Wiring Diagram ....................................................1040
Diagnostic Procedure ..........................................1041
Component Inspection .........................................1043
Removal and Installation .....................................1043
DTC P0335 CKP SENSOR ....................................1044
Description ...........................................................1044
CONSULT-II Reference Value in Data Monitor Mode
1044
ECM Terminals and Reference Value ..................1044
On Board Diagnosis Logic ...................................1045
DTC Confirmation Procedure ..............................1045
Wiring Diagram ....................................................1046
Diagnostic Procedure ..........................................1047
Component Inspection .........................................1049
Removal and Installation .....................................1049
DTC P0336 CKP SENSOR ....................................1050
Description ...........................................................1050
CONSULT-II Reference Value in Data Monitor Mode
1050
ECM Terminals and Reference Value ..................1050
On Board Diagnosis Logic ...................................1051
DTC Confirmation Procedure ..............................1051
Wiring Diagram ....................................................1052
Diagnostic Procedure ..........................................1053
Component Inspection .........................................1055
Removal and Installation .....................................1055
DTC P0340 CMP SENSOR ....................................1056
Description ...........................................................1056
ECM Terminals and Reference Value ..................1056
On Board Diagnosis Logic ...................................1056
DTC Confirmation Procedure ..............................1057
Wiring Diagram ....................................................1058
Diagnostic Procedure ..........................................1059
Component Inspection .........................................1061
Removal and Installation .....................................1061
DTC P0341 CMP SENSOR ....................................1062
Description ...........................................................1062
ECM Terminals and Reference Value ..................1062
On Board Diagnosis Logic ...................................1062
DTC Confirmation Procedure ..............................1063
Wiring Diagram ....................................................1064
Diagnostic Procedure ..........................................1065
Component Inspection .........................................1068
Removal and Installation .....................................1068
DTC P0380 GLOW RELAY ....................................1069
On Board Diagnosis Logic ...................................1069
DTC Confirmation Procedure ..............................1069
Wiring Diagram ....................................................1070
Diagnostic Procedure ..........................................1071
Component Inspection .........................................1072
DTC P0401 EGR FUNCTION ................................1073
Description ...........................................................1073