COMPUSHIFT II Manual – COMPUSHIFT II Manual
Diagnostics & Troubleshooting– 77
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6.2.11 System Over Temp
Indicates the internal temperature of COMPUSHIFT II has exceeded a safe range.
COMPUSHIFT II will automatically turn itself off 25 seconds after this fault is displayed. The status LED will go
dark.
6.3 System Diagnostics
The COMPUSHIFT II is equipped with a self-contained diagnostics system that can help troubleshoot
transmission system problems.
In the diagnostic mode, any input to COMPUSHIFT II can be read, and any transmission function can be
commanded.
Enter the diagnostic mode by pressing the "Select" button.
System Diagnostics
6.3.1 Shift Pressure
Use this screen to actively adjust shift pressure. (This value will be held until you exit diagnostics.)
6.3.2 Shift Solenoids
Use this screen to set the shift solenoids to any commanded gear. (This command will be held until you exit
diagnostics.)
6.3.3 Torque Converter Clutch
Use this screen to engage the Torque Converter Clutch. You can set it to Off or On.
This fault can occur if a partial short exists in the transmission wiring, or if COMPUSHIFT II is overheated
due to improper mounting.
This mode should only be used by qualified transmission technicians. It should never be used to drive a
vehicle. The transmission will resume being in a "safe" mode once diagnostics are exited.
Be especially careful locking the TCC on a vehicle with its driven wheels on the ground (e.g., the front
wheels on a front-wheel-drive vehicle). The vehicle could move suddenly and the engine could stall.
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