Intermittent Condition Testing

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If possible, determine which of the position sensor circuits have the intermittent condition by reviewing the Diagnostic Fault Information table. For example, DTCs P0C57 and P0C52 only set for a short to ground condition on either the S1 or S3 circuit.
Using the Position Sensor Specification table listed below, monitor the position sensor circuits at PIM X1 connector while manipulating the applicable harness and connectors.
- If any of the circuits are not within specification, repair the harness or terminal as required. If a harness repair is indicated and external harness damage is not evident, the most likely location for internal wire damage is near the harness clamping locations.
Disconnect transmission X176 connector and inspect for the following:
- Proper terminal contact
- Proper terminal retention in the connector
- Foreign material or moisture
- Repair, replace or clean the connector as appropriate.
Reconnect all connectors and test drive the vehicle.
- If the DTC sets, replace the applicable drive motor generator and retest for DTCs. If the DTC sets, replace the PIM.

Position Sensor Specification

When Testing at PIM X1 56-way Connector/Terminal	When Testing at Transmission X176 24-way Connector/Terminal	Minimum Resistance	Maximum Resistance
Use the DT-48493 to test at X176. See Special Tools .
55-56	8-9	7.0 ohms	9.0 ohms
53-54	10-11	23 ohms	26 ohms
51-52	12-14	20 ohms	23 ohms
52-56	8-12	Over 1 M ohm	-
54-56	8-10	Over 1 M ohm	-
52-54	10-12	Over 1 M ohm	-

PIM to Transmission Terminal Reference

PIM Connector X1 56-way Connector/Terminal	Transmission X176 24-Way Connector/Terminal	Minimum Resistance	Maximum Resistance
Harness Continuity Test
56	8	-	less than 1 ohm
55	9	-	less than 1 ohm
54	10	-	less than 1 ohm
53	11	-	less than 1 ohm
52	12	-	less than 1 ohm
51	14	-	less than 1 ohm