TEST ACTION APPLICABILITY
3 Turn the ignition off.
Remove the ASD Relay from the PDC.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K25) ASD Output circuit from the PDC to the
appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes → Go To 4
No → Repair the open in the (K25) ASD Relay Output circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
4 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are 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-5-NGC.
5 Turn the ignition off.
Install a substitute relay in place of the ASD Relay.
Ignition on, engine not running.
With the DRBIIIt, erase DTCs.
Attempt to start the engine.
With the DRBIIIt, read DTCs.
Does the DTC reset?
All
Yes → Go To 6
No → Replace the ASD Relay.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
6 Turn the ignition off.
Remove the ASD Relay from the PDC.
Measure the voltage of the (A14) Fused B+ circuit in the PDC.
Is the voltage above 11.0 volts?
All
Yes → Go To 7
No → Repair the (A14) Fused B+ circuit. Inspect the related fuse and
repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
252
DRIVEABILITY - NGC
P0688-ASD RELAY SENSE CIRCUIT LOW — Continued
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