Diagnostic Test

1) DETERMINING IF DTC IS CURRENT
NOTE: Diagnose any related Powertrain DTC(s) before continuing.

With a scan tool, read and record DTC(s).

With the scan tool, clear DTC(s).

Perform 5 ignition cycles, leaving the ignition switch on for a minimum of 90 seconds per cycle.

Using the scan tool, read DTC(s).

Does the DTC reset?

Yes
1. Go To 3).
No
1. Go to 2).
2) INTERMITTENT CONDITION
NOTE:
Check for any of the follow conditions:
- Poor wire to terminal connection
- Corroded terminals
- Backed out or loose terminals
- Broken wire internal to the insulation
- Dirty (partial) module ground
With the ignition on, wiggle the related wires.

Using a scan tool, read DTC(s).

Does the DTC reset?

Yes
1. Repair the wiring as necessary.
2. Perform SKREEM VERIFICATION TEST. (Refer to SKREEM/SKIM VERIFICATION) .
No

DTC is not active at this time. Test complete.
3) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT SHORTED TO BATTERY VOLTAGE
NOTE: A dirty (partial) ground can cause abnormal conditions within a system. Ensure the module has a good ground before continuing.

Turn the ignition off.

Disconnect the SKREEM harness connector.

Using a 12 volt test light connected to ground, probe the Fused Ignition Switch Output (Run-Start) circuit in the SKREEM harness connector.

Does the test light illuminate brightly?

Yes
1. Repair the Fused Ignition Switch Output (Run-Start) circuit for a short to voltage.
2. Perform SKREEM VERIFICATION TEST. (Refer to SKREEM/SKIM VERIFICATION) .
No
1. Replace and program the SKREEM. (Refer to REMOVAL) and (Refer to STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
2. Perform SKREEM VERIFICATION TEST. (Refer to SKREEM/SKIM VERIFICATION) .