2002 ISUZU AXIOM horn

6E±84
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
No Malfunction Indicator Lamp (MIL)
060R200049
Circuit Description
The ªCheck Engineº lamp (MIL) should always be
illuminated and steady with the ignition ªONº and the
engine stopped. Ignition feed voltage is supplied to the
MIL bulb through the meter fuse. The powertrain control
module (PCM) turns the MIL ªONº by grounding the MIL
driver circuit.
Diagnostic Aids
An intermittent MIL may be cased by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:

Inspect the PCM harness and connections for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire
connection, and damaged harness.

If the engine runs OK, check for a faulty light bulb, an
open in the MIL driver circuit, or an open in the
instrument cluster ignition feed.

If the engine cranks but will not run, check for an open
PCM ignition or battery feed, or a poor PCM to engine
ground.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. A ªNo MILº condition accompanied by a no-start
condition suggests a faulty PCM ignition feed or
battery feed circuit.
9. Using a test light connected to B+, probe each of the
PCM ground terminals to ensure that a good ground
is present. Refer to
PCM Terminal End View for
terminal locations of the PCM ground circuits.
12.In this step, temporarily substitute a known good
relay for the PCM relay. The horn relay is nearby,
and it can be verified as ªgoodº simply by honking
the horn. Replace the horn relay after completing
this step.
17.This vehicle is equipped with a PCM which utilizes
an electrically erasable programmable read only
memory (EEPROM). When the PCM is replaced,
the new PCM must be programmed. Refer to
PCM
Replacement and Programming Procedures
Powertrain Control Module (PCM) and Sensors.

6E±89
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
No Reduced Power Lamp (RPL)
060R200073
Circuit Description
The Reduced Power lamp (RPL) should always be
illuminated and steady with the ignition ªONº and the
engine stopped. Ignition feed voltage is supplied to the
RPL bulb through the meter fuse. The powertrain control
module (PCM) orders the RPL ªONº signal for Multiplex
Control Unit. When Multiplex Control Unit is received RPL
ªONº signal that turn RPL ªONº by grounding the RPL
driver circuit.
Diagnostic Aids
An intermittent RPL may be caused by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:

Inspect the PCM and Multiplex Control Unit harness
and connections for improper mating, broken locks,
improperly formed or damaged terminals, poor
terminal to wire connection, and damaged harness.

If the engine runs OK, check for a faulty light bulb, an
open in the MIL driver circuit, or an open in the
instrument cluster ignition feed.

If the engine cranks but will not run, check for an open
PCM ignition or battery feed, or a poor PCM to engine
ground.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.2. A ªNo RPLº condition accompanied by a no±start
condition suggests a faulty PCM ignition feed or
battery feed circuit.
9. Using a test light connected to B+, probe each of the
Multiplex Control Unit ground terminals to ensure
that a good ground is present. Refer to Multiplex
Control Unit Terminal End View for terminal
locations of the Unit Terminal End View for terminal
locations of the Multiplex Control Unit ground
circuits.
12.Using a test light connected to B+, probe each of
the PCM ground terminals to ensure that a good
ground is present. Refer to PCM Terminal End View
for terminal locations of the PCM ground circuits.
21.In this step, temporarily substitute a known good
relay for the PCM relay. The horn relay is nearby,
and it can be verified as ªgoodº simply by honking
the horn. Replace the horn relay after completing
this step.
24.This vehicle is equipped with a PCM which utilizes
an electrically erasable programmable read only
memory (EEPROM). When the PCM is replaced,
the new PCM must be programmed. Refer to PCM
Replacement and Programming Procedures in
Powertrain Control Module (PCM) and Sensors.

6E±110
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Fuel System Electrical Test

 
StepNo Ye s Value(s) Action
11Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
On-Vehicle Service in
Powertrain Control Module and Sensors for
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
ÐVerify repairÐ
121. Reconnect the fuel pump relay.
2. Disconnect the fuel pump electrical connector at the
fuel tank.
3. Using a test light connected to ground, probe the
fuel pump feed wire (harness side).
4. Command the fuel pump ªONº with a Tech 2.
Did the light illuminate for 2 seconds?
ÐGo to Step 15Go to Step 13
131. Honk the horn to verify that the horn relay is
functioning.
2. Substitute the horn relay for the fuel pump relay.
3. Leave the test light connected as in step 12.
4. Command the fuel pump ªONº with the Tech 2.
Did the test light illuminate for 2 seconds when the fuel
pump was commanded ªONº?
ÐGo to Step 17Go to Step 14
141. Re-connect the horn relay in its proper location.
2. Check for a short circuit, blown fuse or open circuit
between the relay and the fuel tank.
Is the action complete?
ÐVerify repairÐ
151. With the fuel pump electrical connector at the fuel
tank disconnected, connect a test light between the
feed wire and the ground wire (harness side).
2. Command the fuel pump ªONº with a Tech 2.
Did the test light illuminate for 2 seconds?
ÐGo to Step 18Go to Step 16
16Repair the open circuit in the fuel pump ground wire.
Is the action complete?
ÐVerify repairÐ
171. Re-connect the horn relay in its proper location.
2. Replace the fuel pump relay.
Is the action complete?
ÐVerify repairÐ
18Replace the fuel pump.
Is the action complete?
ÐVerify repairÐ

6E±558
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
5. Connect the connectors to manifold absolute
pressure sensor, solenoid valve, electric vacuum
sensing valve.
6. Connect the throttle position sensor electrical
connector to throttle body.
7. Install the engine cover.
8. Connect the negative battery cable.
9. Crank the engine until it starts. Cranking the engine
may take longer than usual due to trapped air in the
fuel rail and in the injectors.
Fuel Tank
Removal Procedure
Refer to Fuel Tank In Fuel Pump Relay
014RW134
Throttle Body (TB)
Removal Procedure
1. Disconnect the negative battery cable.
2. Drain the cooling system. Refer to
Cooling System
section.
3. Disconnect the electrical connectors:

Throttle position (TP) sensor.

Intake air temperature (IAT) sensor. Refer to
Intake
Air Temperature Sensor
section.
060RY00014
4. Disconnect the vacuum hose below the air horn.
5. Remove the intake air duct clamp.
6. Disconnect the intake air duct.
7. Disconnect the coolant lines from the throttle body.
8. Remove the bolts from the common chamber.
9. Remove the throttle body from the common chamber.
10. Remove the gasket from the common chamber.
025RY00004
11. Remove the TP sensor. Refer to Throttle Position
(TP) Sensor
section.

ENTERTAINMENT8C±1
AXIOM
BODY AND ACCESSORIES
ENTERTAINMENT
CONTENTS
Service Precaution 8C±1. . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 8C±2. . . . . . . . . . . . . . . . . . . . . . . .
General Description 8C±2. . . . . . . . . . . . . . . . . . . . .
Removal 8C±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rod Type Antenna 8C±3. . . . . . . . . . . . . . . . . . . . . .
Removal 8C±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Socket 8C±4. . . . . . . . . . . . . . . . . . . . . . .
Front Accessory Socket 8C±4. . . . . . . . . . . . . . . .
Removal 8C±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Accessory Socket 8C±4. . . . . . . . . . . . . . . .
Removal 8C±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio 8C±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8C±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speaker 8C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Speaker 8C±6. . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Tweeter Assembly 8C±6. . . . . . . . . . . . . . . .
Removal 8C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Speaker 8C±6. . . . . . . . . . . . . . . . . . . .
Removal 8C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Tweeter Assembly 8C±7. . . . . . . . . . . . . . . .
Removal 8C±7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 8C±7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 8C±8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8C±8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display (MID) 8C±8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8C±8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
MID Control Unit 8C±9. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8C±9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
GPS Control Unit 8C±10. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8C±10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8C±10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Diagnosis 8C±11. . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Diagnosis Flow Chart±1 8C±11. . . . . . . . . . . .
Self-Diagnosis Flow Chart±2 (Audio) 8C±12. . . . .
Self-Diagnosis Flow Chart±3 (Display) 8C±13. . .
Self-Diagnosis Flow Chart±4 (MID) 8C±14. . . . . .
Audio Self-Diagnosis 8C±15. . . . . . . . . . . . . . . . . . .
Display Self-Diagnosis 8C±16. . . . . . . . . . . . . . . . .
MID Self-Diagnosis 8C±17. . . . . . . . . . . . . . . . . . . .
Symptom Diagnosis 8C±18. . . . . . . . . . . . . . . . . . . . .
MID Not Appears 8C±18. . . . . . . . . . . . . . . . . . . . . .
No COMPASS, CLOCK, FUEL
CONSUMPTION, or SERVICE Display 8C±19. .
No COMPASS Display 8C±20. . . . . . . . . . . . . . . . .
No SERVICE Display 8C±20. . . . . . . . . . . . . . . . . .
Other Trouble Symptom 8C±21. . . . . . . . . . . . . . . .
MID Circuit 8C±22. . . . . . . . . . . . . . . . . . . . . . . . . . .
Harness Connector Faces 8C±23. . . . . . . . . . . . . .
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fasteners joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fasteners.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.

8C±8ENTERTAINMENT
Horn
Removal
1. Disconnect the battery ground cable.
2. Remove the horn.

Disconnect the connector.

Remove the horn mounting bolt.
NOTE: High (1), Low (2)
828R200003
Installation
To install, follow the removal steps in the reverse order.
Display (MID)
Removal
1. Disconnect the battery ground cable.
2. Remove the cluster upper cover.

Disconnect the sun sensor connector and the GPS
control unit connector.
3. Remove the center cluster.

Refer to
Instrument Panel Assembly in Body
Structure.
4. Remove the Display (1).

Remove the screws (2).

Disconnect the Display connector and MID control
unit connector.
890R200036
Installation
To install, follow the removal steps in the reverse order.

8D±1
WIRING SYSTEM
AXIOM
BODY AND ACCESSORIES
WIRING SYSTEM
CONTENTS
Fuse, Relay and Diode 8D±2. . . . . . . . . . . . . . . . . . .
Relay / Fuse Box Location 8D±2. . . . . . . . . . . . . .
Relay / Fuse Box (Instrument Panel) 8D±3. . . . .
Relay / Fuse Box (Engine Room) 8D±4. . . . . . . .
Circuit Diagram 8D±5. . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block Circuit 8D±5. . . . . . . . . . . . . . . . . . . . .
Ground Location (Engine Room) 8D±6. . . . . . . .
Ground Location (Cabin) 8D±7. . . . . . . . . . . . . . .
Starter and Generator 8D±8. . . . . . . . . . . . . . . . . .
PCM±1 8D±9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCM±2 8D±10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight and Fog Light 8D±11. . . . . . . . . . . . . . . .
Turn, Hazard, Stop, Back Up, Horn and
A/T Shift Lock 8D±12. . . . . . . . . . . . . . . . . . . . . . . .
Dome Light, Luggage Room Light, Courtesy
Light, Spot Light, and Warning Buzzer 8D±13. . .
Power Window and Door Lock 8D±14. . . . . . . . . .
Alarm and Relay Control Unit 8D±15. . . . . . . . . . . Rear Wiper/Washer and Rear Defogger 8D±16. .
Audio, Clock, Cigarette Lighter and
ACC Socket 8D±17. . . . . . . . . . . . . . . . . . . . . . . . . .
MID 8D±18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Mirror 8D±19. . . . . . . . . . . . . . . . . . . . . . . . . . .
Meter 8D±20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-theft with Keyless Entry 8D±21. . . . . . . . . . . .
Air Conditioning 8D±22. . . . . . . . . . . . . . . . . . . . . . .
ABS 8D±23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS±Air Bag 8D±24. . . . . . . . . . . . . . . . . . . . . . . . . .
Intelligent Suspension 8D±25. . . . . . . . . . . . . . . . . .
T.O.D 8D±26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof 8D±27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination Light 8D±28. . . . . . . . . . . . . . . . . . . . . .
Windshield Wiper and Washer 8D±29. . . . . . . . . .
Power Seat 8D±30. . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Heater 8D±31. . . . . . . . . . . . . . . . . . . . . . . . . . .

8D±4
WIRING SYSTEM
Relay / Fuse Box (Engine Room)
D08R200046
Legend
(1) Fuse/Relay Box
(2) Option Box
(3) Diode (Not Used)
(4) Diode
(5) Heater Relay
(6) A/C Compressor Relay
(7) Headlamp Relay RH
(8) Not Used
(9) Fog Lamp Relay
(10) Not Used
(11) Not Used
(12) Thermo Relay
(13) Headlamp Relay LH
(14) Starter Relay
(15) ECM Main
(16) Fuel Pump Relay
(17) Not Used
(18) IG.1 (+B.1 60A)
(19) Main (100A)(20) ECM (30A)
(21) ABS (50A)
(22) IG.2 (+B.2 50A)
(23) Condenser Fan (30A)
(24) Hazard (15A)
(25) Horn (10A)
(26) ACG±S (10A)
(27) Seat Heater (15A)
(28) Blower (15A)
(29) Blower (15A)
(30) A/C (10A)
(31) Headlamp±LH (20A)
(32) Headlamp±RH (20A)
(33) Fog Lamp (15A)
(34) O
2 Sensor (20A)
(35) Fuel Pump (20A)
(36) ECM (15A)
(37) TOD (15A)
(38) Intelligent Suspension Relay (30A)
(39) Condenser Fan Relay