Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 266

6E–94

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Reduced Power Lamp (RPL) “ON” Steady

 

Step

Action

Value(s)

Yes

No

1

Was the “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

1. Ignition “OFF”, disconnect Multiplex Control Unit.
2. Ignition “ON”, observe the RPL (Reduced Power

Lamp).

Is the RPL “ON”?

—

Go to 

Step 3

Go to 

Step 4

3

1. Ignition “OFF”, disconnect the instrument panel

cluster.

2. Check the RPL driver circuit between the Multiplex

Control Unit and the instrument panel cluster for a
short to ground.

3. If a problem is found, repair as necessary.

Was the RPL driver circuit shorted to ground?

—

Verify repair

Go to 

Step 4

4

1. Replace the Multiplex Control Unit.
2. Install the Tech 2
3. Ignition “ON”. 
4. Using the Tech 2 output controls function, select

RPL dash lamp control and command the RPL
“OFF”. (Refer to the Miscellaneous test)

Did the MIL turn “OFF”?

—

Verify repair

Go to 

Step 5

5

1. Ignition “OFF”.
2. Disconnect the PCM.
3. Check the circuit (Lamp driver Circuit) between

PCM and Multiplex Control Unit.

Was a problem found?

—

Go to 

Step 6

Go to 

Step 7

6

Locate and repair the circuit between Multiplex Control
Unit and PCM open circuit.

Is the action complete?

—

Go to 

Step 7

—

7

1. Install the Tech 2
2. Ignition “ON”.
3. Using the Tech 2 output controls function, select

RPL dash lamp control and command the RPL
“OFF”. (Refer to the Miscellaneous test)

Did the MIL turn “OFF”?

—

Go to 

Verify

repair

Go to 

Step 8

8

1. Ignition ”OFF”.
2. Disconnect the PCM.
3. Check the circuit (DLC line) between PCM and

DLC.

Was a problem found?

—

Go to 

Step 9

Go to 

Step 10

6E–95

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Reduced Power Lamp (RPL) “ON” Steady

  (Cont'd)

Step

No

Yes

Value(s)

Action

9

Locate and repair the circuit between PCM and DLC.

Is the action complete?

—

Go to 

Step 2

—

10

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed.

Refer to ON-Vehicle Service in Power 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?

—

Go to 

OBD

System

Check

—

6E–96

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Starter Control System Check

060R200062

Circuit Description

Starter control system is controlled by the Power Train
Control Module (PCM). The PCM monitors starter switch
signal (“START”position ) and MODE switch (park or
neutral) signal. PCM is operated by the ignition switch.
Ignition feed voltage is supplied to the MODE switch and
starter relay through the engine fuse. PCM turns the
starter relay “ON” by grounding the starter relay driver
circuit.
The starter motor is operated until 30 seconds based on
starter relay signal.

Diagnostic Aids

An intermittent may be caused by the following:

D

Poor connections.

D

Mis routed harness.

D

Rubbed through wire insulation.

D

Broken wire inside the insulation.

Test Description

2.If Anti-theft system is “ON”, PCM does not operate

starter control system.

19.Refer to 

6D section.

21.Refer to 

6D section.

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.

Starter Control System Check

 

Step

Action

Value(s)

Yes

No

1

Was the “On-Board (OBD) System Check” performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

Was the “Anti-theft System” normally? Refer to
Owner’s Manual.

—

Go to 

Step 3

Go to 

Step 7

6E–97

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Starter Control System Check

  (Cont'd)

Step

No

Yes

Value(s)

Action

3

1. Gear position is “park or neutral”.
2. Do not depress the accelerator pedal.
3. Turn the key to “START” position.
4. Release the key switch to the to “ON” position.

Does the engine crank?

—

Go to 

Step 27

Go to 

Step 4

4

1. Install the Tech 2.
2. Select “Display DTCs” with the Tech 2.

Are any DTCs stored?

—

Go to 

Step 5

Go to 

Step 6

5

Review and record for Tech 2 Failure Records data and
DTCs.

Were any DTCs information stored?

—

Go to 

DTCs

Chart

—

6

1. Gear position is “park or neutral”.
2. Do not depress the accelerator pedal.
3. Turn the key to “START” position.

Is the engine cranking?

—

Go to 

Step 27

Go to 

Step 7

7

Check the anti–theft module circuit. Check the circuit
between PCM and anti–theft module.

Is the problem found?

—

Go to 

Step 8

Go to 

Step 9

8

Repair the circuit as necessary.

Is the action complete?

—

Verify repair

—

9

1. Probe the anti-theft module circuit to GND.
2. Turn the key to “START” position.

Is the engine cranking?

—

Go to 

Step 10

Go to 

Step 11

10

Check the anti-theft system. Refer to 

section 8H

anti-theft.

—

Verify repair

—

11

Check the starter relay, starter fuse and engine fuse.

Is the problem found?

Go to 

Step 12

Go to 

Step 13

12

Replace the starter relay, starter fuse and engine fuse.

Is the action complete?

—

Verify repair

—

13

Check the starter circuit.

1. Ignition is ”OFF”.
2. Remove the starter relay.
3. Check the circuit between starter relay and starter

motor.

Is the problem found?

—

Go to 

Step 14

Go to 

Step 15

14

Repair the circuit as necessary.

Is the action complete?

—

Verify repair

—

15

Check the starter circuit.

1. Remove the main fuse (100A).
2. Check the circuit between main fuse and starter

motor.

3. Check the circuit between GND and starter motor.

Is the problem found?

—

Go to 

Step 16

Go to 

Step 17