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
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