Workshop Manual

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