1, 2 and 3 Digit Codes: 76

CODE NUMBER
Scan tool: 76
General scan tool: P1739

CODE NAME
Power-up at speed

CODE DESCRIPTION
Technical Description
If a vehicle loses power to the TCM, the vehicle will go to the 2nd gear mode since there is no power available to control the transmission solenoids. However if power is restored, the TCM will power-up and normal operation will be restored. Fault code 76 that identifies that power to the TCM was restored when the gear selector was in a "Drive" position while the vehicle was moving at speeds above 32 km/h (20 mph). Unfortunately, if a person shifts to Neutral and cycles the ignition key and quickly shifts to "Drive" while moving before the TCM comes out of its START ROUTINE, the fault can be set. Therefore it is critical that this fault diagnosis repair procedure should only be used if the vehicle is experiencing intermittent 2nd gear operation and subsequently a return to normal operation during normal driving.

Check Area/Set Conditions
When TCM initially power-up.
If the TCM power up while in the "Drive" position and the vehicle is going above 32 km/h (20 mph), the code is set.

Transmission Effects
No limp-in condition. Fault code is for information only when trying to diagnosis intermittent 2nd gear operation and subsequently a return to normal operation.

PROBABLE CAUSE
- Intermittent direct battery connection between TCM and battery
- Intermittent ignition switch output between TCM
- Intermittent ground to TCM





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