relay ISUZU AXIOM 2002 Service Owner's Guide

6E±4
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P1107 MAP Circuit Intermittent Low
Voltage 6E±386. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D T C P 1111 I AT Sensor Circuit Intermittent
High Voltage 6E±388. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1112 IAT Sensor Circuit Intermittent
Low Voltage 6E±391. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1114 ECT Sensor Circuit Intermittent
Low Voltage 6E±393. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1115 ECT Sensor Circuit Intermittent
High Voltage 6E±395. . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Code(DTC)P1120-TPS 1
Throttle Position Sensor (TPS1) Output
Abnormal 6E±398. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1125 ETC (Electric Throttle Control)
Limit Performance Mode 6E±401. . . . . . . . . . . . . . . . .
DTC P1133 HO2S Insufficient Switching
Bank 1 Sensor 1 6E±404. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1134 HO2S Transition Time Ratio
Bank 1 Sensor 1 6E±408. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1153 HO2S Insufficient Switching
Bank 2 Sensor 1 6E±412. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1154 HO2S Circuit Transition Time
Ratio Bank 2 Sensor 1 6E±416. . . . . . . . . . . . . . . . . .
DTC P1167 Fuel System Rich During Decel
Fuel Cut Off (Bank 1) 6E±420. . . . . . . . . . . . . . . . . . . .
DTC P1169 Fuel System Rich During Decel
Fuel Cut Off (Bank 2) 6E±422. . . . . . . . . . . . . . . . . . . .
DTC P1171 Fuel System Lean During
Acceleration 6E±424. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1220 Throttle Position Senser2
(TPS2) Circuit Fault 6E±427. . . . . . . . . . . . . . . . . . . . .
DTC P1221 TPS1 ± TPS2 Correlation
(Circuit Performance) 6E±430. . . . . . . . . . . . . . . . . . .
DTC P1271 APS 1± 2 Correlation Error 6E±433. . .
DTC P1272 APS 2 ± 3 Correlation Error 6E±436. . .
DTC P1273 APS 1 ± 3 Correlation Error 6E±439. . . .
DTC P1275 APS 1 Output Fault 6E±442. . . . . . . . . . .
DTC P1280 APS 2 Output Fault 6E±444. . . . . . . . . . .
DTC P1285 APS 3 Output Fault 6E±446. . . . . . . . . . .
DTC P1290 ETC Forced Idle Mode 6E±448. . . . . . . .
DTC P1295 ETC Power Management Mode 6E±451
DTC P1299 ETC Forced Engine Shutdown
Mode 6E±455. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1310 ION Sensing Module Diagnosis 6E±459
DTC P1311 ION Sensing Module SEC
Line 1 Circuit Fault 6E±462. . . . . . . . . . . . . . . . . . . . . .
DTC P1312 ION Sensing Module SEC
Line 2 Circuit Fault 6E±465. . . . . . . . . . . . . . . . . . . . . .
DTC P1326 ION Sensing Module Combustion
Quality Input Circuit Fault 6E±468. . . . . . . . . . . . . . . .
DTC P1340 ION Sensing Module Cylinder ID
Fault (Cylinder Synchronization Fail) 6E±471. . . . . .
DTC P1404 EGR Stuck Closed 6E±474. . . . . . . . . . .
DTC P1441 EVAP System Flow During
Non-Purge 6E±477. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1514 TPS - MAF Correlation Error 6E±480. . . DTC P1515 Command - Actual TPS
Correlation Error 6E±484. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1516 Command - Actual TPS
Correlation Error 6E±487. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1523 Actuator Control Return
Performance 6E±490. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1571 Brake Switch No Operation 6E±493. . . .
DTC P1625 PCM Unexpected Reset 6E±495. . . . . . .
DTC P1635 Reference Voltage # 1 Circuit
Fault 6E±496. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1639 Reference Voltage # 2 Circuit
Fault 6E±498. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1640 Driver-1-Output Circuit Fault
(ODM) 6E±500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1650 Quad Driver Module ªAº Fault 6E±503. .
Symptom Diagnosis 6E±506. . . . . . . . . . . . . . . . . . . . .
Default Matrix Table 6E±535. . . . . . . . . . . . . . . . . . . . .
On Vehicle Service
Crankshaft Position (CKP) Sensor 6E±538. . . . . . . . .
Engine Coolant Temperature (ECT) Sensor 6E±538.
Heated Oxygen Sensor (HO2S) 6E±539. . . . . . . . . . .
Intake Air Temperature (IAT) Sensor 6E±542. . . . . . .
ION Sensing Module 6E±542. . . . . . . . . . . . . . . . . . . . .
Mass Air Flow (MAF) Sensor 6E±543. . . . . . . . . . . . .
Manifold Absolute Pressure (MAP) Sensor 6E±544.
Malfunction Indicator Lamp (MIL) 6E±545. . . . . . . . . .
Reduced Power Lamp 6E±545. . . . . . . . . . . . . . . . . . .
Powertrain Control Module (PCM) 6E±545. . . . . . . . .
Service Precaution 6E±545. . . . . . . . . . . . . . . . . . . .
EEPROM 6E±547. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Position (TP) Sensor 6E±547. . . . . . . . . . . . .
Vehicle Speed Sensor (VSS) 6E±548. . . . . . . . . . . . .
Air Cleaner/Air Filter 6E±549. . . . . . . . . . . . . . . . . . . . .
Common Chamber 6E±549. . . . . . . . . . . . . . . . . . . . . .
Accelerator Pedal Replacement 6E±550. . . . . . . . . . .
Accelerator Position Sensor Replacement 6E±551. .
Accelerator Position Sensor Adjustment 6E±551. . . .
Fuel Filler Cap 6E±552. . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Filter 6E±552. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Gauge Unit 6E±553. . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injectors 6E±554. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Metering System 6E±555. . . . . . . . . . . . . . . . . . . .
Fuel Pump Assembly 6E±555. . . . . . . . . . . . . . . . . . . .
Fuel Pump Relay 6E±556. . . . . . . . . . . . . . . . . . . . . . . .
Fuel Rail Assembly 6E±557. . . . . . . . . . . . . . . . . . . . . .
Fuel Tank 6E±558. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body (TB) 6E±558. . . . . . . . . . . . . . . . . . . . . . .
Electronic Ignition System 6E±560. . . . . . . . . . . . . . . .
Catalytic Converter 6E±561. . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Thermo Relay 6E±561. . . . . . . . . . .
EVAP Canister Hoses 6E±561. . . . . . . . . . . . . . . . . . . .
EVAP Canister 6E±562. . . . . . . . . . . . . . . . . . . . . . . . . .
EVAP Canister Vent Solenoid 6E±562. . . . . . . . . . . . .

6E±14
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinouts
PCM Pinout Table, 80-Way Blue Connector ± Row ªF1 ~ 20º
060RY00045
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
F1PCM GroundBLK0.0V0.0VChassis Electrical
F25Volt Referenceª2º (AP
Sensor 2)GRN5.0V5.0VAccelerator Position (AP)
Sensor
F35Volt Referenceª2º (TP
Sensor 2)RED/WHT5.0V5.0VThrottle Position (TP) Sensor
F4A/C ClutchGRY/REDB+(A/C off)B+(A/C off)General Description and
Operation, A/C Clutch Circuit
Operation
F5Relay Shift SolenoidGRN/RED0.0V0.0V4L30E T/Mission
F6Not UsedÐÐÐÐ
F7TachometerBLK/RED8.8V10.0V (at
idle)Chassis Electrical
F8Not UsedÐÐÐÐ
F9Not UsedÐÐÐÐ
F10Not UsedÐÐÐÐ
F11T.O.DRED/WHTÐÐÐ
F12Not UsedÐÐÐÐ
F13Starter FeedPNKÐÐÐ
F14Mass Air Flow(MAF)BLK/BLU4.9V4.2VGeneral Description, Mass
Air Flow Sensor
F15Not UsedÐÐÐÐ
F16Not UsedÐÐÐÐ
F17Bank 1 HO2S LowRED0.3V0.1±0.9VGeneral Description and
Operation, Catalyst Monitor
HO2S 2
F18Not UsedÐÐÐÐ
F19Ignition FeedRED/GRNB+B+6D Section
F20Ignition FeedRED/WHTB+B+6D Section

6E±16
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 80-Way Blue Connector ± Row ªF41 ~ 60º
060RY00046
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
F41Throttle Position(TP) 1
Sensor GroundGRN0.0V0.0VGeneral Description and
Operation, TPS
F42Fuel Pump RelayPNK/WHT0.0VB+On Vehicle Service, Fuel
Pump Relay
F43Adaptor CaseVIO/RED0.0V0.0V4L30E T/Mission
F44Bank 1 HO2S 2 Heater
GroundORN/WHT0.0V0.0VGeneral Description and
Operation, Catalyst Monitor
HO2S 2
F45A/C RequestGRN/BLK0.0V0.0VChassis Electrical
F46Stop Lamp SwitchBRN/RED0.0V0.0VChassis Electrical
F47Adaptor CaseVIO/WHTB+B+4L30E T/Mission
F48Throttle Valve DC Motor(±:
REV)BLUDuty CycleDuty CycleGeneral Description and
Operation, ETC
F49Not UsedÐÐÐÐ
F50Bank 2 HO2S 2 GroundORN0.0V0.0VÐ
F51Not UsedÐÐÐÐ
F52Bank 1 HO2S 2 GroundRED0.0V0.0VÐ
F53ECT GroundYEL/BLK0.0V0.0VGeneral Description and
Operation, ECT Sensor
F54Vapor Pressure (Fuel Tank
Pressure) Sensor GroundGRN0.0V0.0VGeneral Description and
Operation, VP Sensor
F55Not UsedÐÐÐÐ
F56Injector Cylinder #5GRN/BLKB+B+General Description and
Operation, Fuel Injector
F57Ignition FeedRED/WHTB+B+Chassis Electrical
F58Class 2 DataORN/BLK0.0V0.0VGeneral Description
F59Not UsedÐÐÐÐ
F60Not UsedÐÐÐÐ

6E±23
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 80-Way Red Connector ± Row ªS41 ~ 60º
060RY00050
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
S41AP Sensor 3 Sensor
GroundORN/BLU0.0V0.0VOn-Vehicle Service
S42Bank 2 HO2S 1 Heater
GroundWHT/RED0.0V0.0VGeneral Description and
Operation, Catalyst Monitor
HO2S
S43Solenoid Power SupplyGRY/WHTB+B+4L30E T/Mission
S44Rr Def. RelayRED/WHTÐÐÐ
S45Starter RelayBLK/BLUÐÐÐ
S46Fuel GaugeYEL/REDB+B+Chassis Electrical
S47Water Temp. GaugeWHT/BLKB+B+4L30E T/Mission
S48Fuel GaugeYEL/REDB+B+General Description and
Chassis Electrical
S49DLCRED/WHTB+B+General Description
S50Fuel Sender UnitORN/GRN0.0V0.0VÐ
S51TCC SolenoidBRN/BLU0.0V0.0VT/Mission
S52Vapor Pressure (Fuel Tank
Pressure) Sensor SignalGRY0.2±4.8V0.2±4.8VGeneral Description and
Operation, VP Sensor
S53Power SwitchVIO/REDB+B+4L30E T/Mission
S54Bank 2 HO2S 1 LowBLU0.0V0.1VGeneral Description and
Operation, Catalyst Monitor
HO2S
S55Transmission Output
Speed SensorBLU/GRN0.0V0.0V4L30E T/Mission
S56Not UsedÐÐÐÐ
S57Not UsedÐÐÐÐ
S58Bank 1 HO2S 1 HighORN/BLU0.3V0.1±0.9VGeneral Description and
Operation, Catalyst Monitor
HO2S

6E±28
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Component Locator Table
Number
NameLocation
1Linear Exhaust Gas Recirculation (EGR) ValveRear right side of the engine
2Throttle Position (TP) SensorOn the throttle body
3Intake Air Temperature (IAT) SensorOn the intake air duct near the throttle body
4Check Engine (MIL) LightOn the instrument panel beneath the
tachometer
5Positive Crankcase Ventilation (PCV) ValveOn the left of the cylinder head cover
6Air CleanerLeft front of the engine bay
7Mass Air Flow (MAF) SensorAttached to the air filter box
8Fuel RailOn the Common Chamber
9Fuel Pressure RegulatorRear side of the engine
10ION Sensing moduleBolted to the top of the Common Chamber
11Common ChamberTop of the engine
12EVAP Duty Solenoid ValveBolted to the front of the coolant pipe
13Fuse/Relay BoxAlong the inside of the right fender
14Manifold Absolute Pressure (MAP) SensorBolted to the top of the Common Chamber
15Throttle BodyBetween the intake air duct and the Common
Chamber
16Engine Coolant Temperature SensorOn the coolant crossover pipe at the front of
the engine, near the throttle body
17Power Train Control Module (PCM)Along the inside of the left fender

6E±30
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Fuse and Relay Panel (Underhood Electrical Center)
060R200085

6E±35
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Inspect all wires in the engine compartment for proper
connections, burned or chafed spots, pinched wires,
contact with sharp edges or contact with hot exhaust
manifolds or pipes.
Basic Knowledge of Tools Required
NOTE: Lack of basic knowledge of this powertrain when
performing diagnostic procedures could result in an
incorrect diagnosis or damage to powertrain
components. Do not attempt to diagnose a powertrain
problem without this basic knowledge.
A basic understanding of hand tools is necessary to effec-
tively use this section of the Service Manual.
Serial Data Communications
Class 2 Serial Data Communications
Government regulations require that all vehicle
manufacturers establish a common communication
system. This vehicle utilizes the ªClass 2º communication
system. Each bit of information can have one of two
lengths: long or short. This allows vehicle wiring to be
reduced by transmitting and receiving multiple signals
over a single wire. The messages carried on Class 2 data
streams are also prioritized. If two messages attempt to
establish communications on the data line at the same
time, only the message with higher priority will continue.
The device with the lower priority message must wait.
The most significant result of this regulation is that it
provides Scan tool manufacturers with the capability to
access data from any make or model vehicle that is sold.
The data displayed on other Scan tools will appear the
same, with some exceptions. Some Scan tools will only
be able to display certain vehicle parameters as values
that are a coded representation of the true or actual value.
On this vehicle the Scan tool displays the actual values for
vehicle parameters. It will not be necessary to perform
any conversions from coded values to actual values.
On-Board Diagnostic (OBD II)
On-Board Diagnostic Tests
A diagnostic test is a series of steps, the result of which is
a pass or fail reported to the diagnostic executive. When
a diagnostic test reports a pass result, the diagnostic
executive records the following data:

The diagnostic test has been completed since the last
ignition cycle.

The diagnostic test has passed during the current
ignition cycle.

The fault identified by the diagnostic test is not
currently active.
When a diagnostic test reports a fail result, the diagnostic
executive records the following data:

The diagnostic test has been completed since the last
ignition cycle.

The fault identified by the diagnostic test is currently
active.

The fault has been active during this ignition cycle.

The operating conditions at the time of the failure.Remember, a fuel trim DTC may be triggered by a list of
vehicle faults. Make use of all information available (other
DTCs stored, rich or lean condition, etc.) when
diagnosing a fuel trim fault.
Comprehensive Component Monitor
Diagnostic Operation
Comprehensive component monitoring diagnostics are
required to monitor emissions-related input and output
powertrain components. The
CARB OBD II
Comprehensive Component Monitoring List Of
Components Intended To illuminate MIL
is a list of
components, features or functions that could fall under
this requirement.
Input Components:
Input components are monitored for circuit continuity and
out-of-range values. This includes rationality checking.
Rationality checking refers to indicating a fault when the
signal from a sensor does not seem reasonable, i.e.
Throttle Position (TP) sensor that indicates high throttle
position at low engine loads or MAP voltage. Input
components may include, but are not limited to the
following sensors:

Vehicle Speed Sensor (VSS)

Crankshaft Position (CKP) sensor

Throttle Position (TP) sensor

Engine Coolant Temperature (ECT) sensor

Manifold Absolute Pressure (MAP) sensor

Mass Air Flow (MAF) sensor
In addition to the circuit continuity and rationality check,
the ECT sensor is monitored for its ability to achieve a
steady state temperature to enable closed loop fuel
control.
Output Components:
Output components are diagnosed for proper response to
control module commands. Components where
functional monitoring is not feasible will be monitored for
circuit continuity and out-of-range values if applicable.
Output components to be monitored include, but are not
limited to, the following circuits:

Control module controlled EVAP Canister Purge
Valve

Electronic Transmission controls

A/C relays

VSS output

MIL control

Cruise control inhibit
Refer to PCM and Sensors in General Descriptions.
Passive and Active Diagnostic Tests
A passive test is a diagnostic test which simply monitors a
vehicle system or component. Conversely, an active test,
actually takes some sort of action when performing
diagnostic functions, often in response to a failed passive
test. For example, the EGR diagnostic active test will
force the EGR valve open during closed throttle decel
and/or force the EGR valve closed during a steady state.
Either action should result in a change in manifold
pressure.

6E±44
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Not Run Since Code Cleared
This option will display up to DTCs that have not run since
the DTCs were last cleared. Since any displayed DTCs
have not run, their condition (passing or failing) is
unknown.
Test Failed Since Code Cleared
This selection will display all active and history DTCs that
have reported a test failure since the last time DTCs were
cleared. DTCs that last failed more than 40 warm-up
cycles before this option is selected will not be displayed.
Miscellaneous Test
This test consists of eight menus-Lights, Relays, EVAP,
Fuel System, Instruments, EGR Control, Variable Intake
Manifold Solenoid, and Injector Balance Tests.
In these tests, Tech 2 sends operating signals to the
systems to confirm their operations thereby to judge the
normality of electric circuits.
To judge intermittent trouble,
1. Confirm DTC freeze frame data, and match the
freeze frame data as test conditions with the data list
displayed by Miscellaneous Test.
2. Confirm DTC setting conditions, and match the
setting conditions as test conditions with the data list
displayed by Miscellaneous Test.
3. Refer to the latest Service Bulletin.
Check to see if the Latest software is released or not.
Down load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Lamps Test
This test is conducted check MIL, Up Shift Lamp, Low
Fuel Lamp, Reduced Power Lamp and Cruise Control
Lamp for its working.
Tech2 must be used for this test.
Test Procedure:
1. Connect Tech 2 to the vehicle DLC.
2. Run the Engine at idle.
3. Select F3: Miscellaneous Test in the Application
Menu.
060R100078
4. Select F0:Lamps Test in the Miscellaneous Test.
060RY00080
5. Select F0:Malfunction Indicator Lamp.
060RY00091
6. PushºOnº soft key.
7. Make sure Lamp illuminates.
8. If lamp illuminates, the Lamp is operating correctly.

6E±46
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Relays Test
This test is conducted to check Fuel Pump Relay and A/C
Clutch for proper operation.
Tech 2 must be used for this test.
Test Procedure:
1. Connect Tech 2 to the vehicle DLC.
2. Ignition SW is ªOnº.
3. Select F3: Miscellaneous Test in the Application
Menu.
060R100078
4. Select F1:Relay Test in the Miscellaneous Test.
060RY00081
5. Select F0:Fuel Pump Relay.
060RX021
6. Push ªOnº soft key.
060RY00093
7. Control Fuel Pump Relay and check data list.
8. If the data list changes, the Fuel Pump Relay is
normal.
9. Select F1:A/C Clutch Relay.
10. Run the Engine at idle.

6E±47
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
11. Turn on Air Conditioning.
060RY00094
12. Turn ªOnº and ªOffº A/C Switch.
13. Contol A/C Clutch Relay and check data list.
14. If the data list changes, the Fuel Pump Relay is
normal.
EVAP Test
This test is conducted to check EVAP system for its power
operation.
Tech 2 must be used for this test.
Test Procedure:
1. Connect Tech 2 to the vehicle DLC.
2. Run the Engine at idle.
3. Select F3: Miscellaneous Test in the Application
Menu.
060R100078
4. Select F2: EVAP Test in the Miscellaneous Test.
060RY00082
5. Select F0: Purge Solenoid.
060RX025