Isuzu Trooper (1998-2002 year). Manual — part 431
6E–94
6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS
Service Vehicle Soon (SVS) Lamp “ON” Steady
D06R200111
Circuit description
The Service Vehicle Soon (SVS) lamp is a lamp which
added the function of immobi warning to the Reduced
Power Lamp (RPL).
The SVS lamp should always be illminated and steady
with ignition “ON” and the engine stopped. Ignition feed
voltage is supplied directly to the SVS lamp indicator. The
powertrain control module (PCM) turns the SVS lamp
“ON” by grounding the SVS lamp driver circuit.
The RPL should not remain “ON” with the engine running
and no DTC(s) set. A steady SVS lamp with the engine
running and no DTC(s) suggests a short to ground in the
SVS lamp driver circuit.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:
D
Poor connection or damaged harness – Inspect the
PCM harness and connectors for improper mating,
broken locks, improperly formed or damaged
terminals, poor terminal-to-wire connection, and
damaged harness.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. If the SVS lamp does not remain “ON” when the
PCM is disconnected, the SVS lamp driver wiring is
not faulty.
3. If the SVS lamp driver circuit is OK, the instrument
panel cluster is faulty.
6. 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–95
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Service Vehicle Soon (SVS) Lamp “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 PCM.
2. Ignition “ON”, observe the SVS lamp.
Is the SVS lamp “ON”?
—
Go to
Step 3
Go to
Step 5
3
1. Ignition “OFF”, disconnect the instrument panel
cluster.
2. Check the SVS lamp driver circuit between the PCM
and the instrument panel cluster for a short to
ground.
3. If a problem is found, repair as necessary.
Was the SVS lamp driver circuit shorted to ground?
—
Go to
OBD
System
Check
Go to
Step 4
4
Replace the instrument panel cluster.
Is the action complete?
—
Go to
OBD
System
Check
—
5
1. Ignition “OFF”, reconnect the PCM.
2. Ignition “ON”, reprogram the EEPROM. Refer to
On-Vehicle Service in Powertrain Control Module
and Sensors for procedures.
3. Using the Tech 2 output controls function, select
RPL dash lamp control and command the RPL
(SVS lamp) “OFF”. (Refer to the Miscellaneous
test)
Did the SVS lamp turn “OFF”?
—
Go to
OBD
System
Check
Go to
Step 6
6
Replace 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?
—
Go to
OBD
System
Check
—
6E–96
6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
D06R200100
6E–97
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
D06R200081
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