Symptom:
*NO RESPONSE FROM PCM WITH A NO START CONDITION
POSSIBLE CAUSES
PCM FUSED B+ CIRCUIT
PCM FUSED IGNITION SWITCH OUTPUT CIRCUIT
PCM GROUND CIRCUITS
PCM
TEST ACTION APPLICABILITY
1 NOTE: The DRBIIIt and cable must be operating properly for the results of
this test to be valid.
NOTE: Ensure the ignition switch was on when trying to communicate with
the PCM.
Turn the ignition off.
Disconnect the PCM harness connector.
Using a 12-volt test light connected to ground, probe the PCM Fused B+ circuit in the
PCM harness connector.
Does the test light illuminate brightly?
All
Yes → Go To 2
No → Repair the Fused B+ circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
2 Turn the ignition off.
Disconnect the PCM harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the PCM Fused Ignition Switch
Output circuit in the PCM harness connector.
Does the test light illuminate brightly?
All
Yes → Go To 3
No → Repair the Ignition Switch Output circuit
Perform POWERTRAIN VERIFICATION TEST VER - 1.
3 Turn the ignition off.
Disconnect the PCM harness connector.
Using a 12-volt test light connected to battery voltage, probe all the PCM ground
circuits in the PCM harness connector.
Does the test light illuminate brightly?
All
Yes → Go To 4
No → Repair the PCM ground circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
4 If there is no possible causes remaining, view repair. All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
333
STARTING