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
5 VOLT (PRIMARY AND SECONDARY) SUPPLY SHORTED TO GROUND
TEST
ACTION
APPLICABILITY
1
NOTE: The DRBIII
t 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 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.
252
STARTING