P1DC7

P1DC7-CLUTCH TEMP THRESHOLD ACHIEVED - SHIFT TIME REDUCTION

For a complete wiring diagram Refer to the Wiring Information.

Theory of Operation

The purpose of the monitoring is to check whether the coating temperature of a clutch is above three critical calibrated temperature thresholds. The clutch temperature is calculated using a temperature model in the Transmission Control module (TCM) which is based upon input speed and output speed, current gear and target gear, calculated effective pressure on engaging clutch and on disengaging clutch. The fault codes set by this diagnostic are used to protect the durability of the clutches by controlling the shift operation. No repair action is required. This fault is only used to initiate a calibration strategy and for diagnostic information in case other faults are set.

- When Monitored:
Gear shift or gear engagement active.

- Set Condition:
Low Temperature Severity (Spontaneity and Skip Shift deactivated)

The fault is detected if the temperature is greater than a calibrated threshold.

Medium Temperature Severity (Auto stick deactivated)

The fault is detected if the temperature is greater than a calibrated threshold.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 8HP45 Pre-Diagnostic Troubleshooting Procedure

CHECK FOR OTHER DTCS

NOTE: No repair action is required. This fault is only used to initiate a calibration strategy and for diagnostic information in case other faults are set.

1. With the scan tool, read TCM DTCs.

View Repair

- Testing and Inspection Perform the appropriate diagnostic procedure.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.