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*CHECKING PARK/NEUTRAL SWITCH OPERATION —
TEST
4
Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Move the Gear selector through all gear positions, from Park to 1st and back.
While moving the gear selector through each gear, measure the resistance between
ground and the P/N Position Switch Sense circuit in the appropriate terminal of
special tool #8815.
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.
Did the resistance change from above 10.0 ohms to below 10.0 ohms?
Yes → Go To 5
→ Replace the Transmission Range Sensor per the Service Informa-
No
5
Using the schematics as a guide, inspect the wiring and connectors. Repair as
necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.
Repair
ACTION
tion.
Replace the Powertrain Control Module per the Service Informa-
tion.
TRANSMISSION - NGC
309
Continued
APPLICABILITY
All
All
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