Allison

Allison 3000 & 4000 Gen 4 Fault Code: P0634 TCM...

DIAGNOSTIC RESPONSE:SOL OFF (hydraulic default) CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) is equipped with an internal temperature sensor mounted directly to its circuit board. The TCM takes action to protect...

Allison 3000 & 4000 Gen 4 Fault Code: P0614 Tor...

DIAGNOSTIC RESPONSE:Allows operation only in reverse and second range CIRCUIT DESCRIPTION:Shift Energy Management (SEM) allows the Transmission Control Module (TCM) to request torque reduction from the engine controller. By reducing...

Allison 3000 & 4000 Gen 4 Fault Code: P0613 TCM...

DIAGNOSTIC RESPONSE:All solenoids off CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) continually performs a series of processing steps known as a “processing loop” during normal operation. The TCM must complete the...

Allison 3000 & 4000 Gen 4 Fault Code: P0610 TCM...

DIAGNOSTIC RESPONSE:Use TID A calibration CIRCUIT DESCRIPTION:The Trans ID (TID) signal is provided by a connection to HSD1 using W176 during TCM initialization. W176 is connected to High Side Driver...

Allison 3000 & 4000 Gen 4 Fault Code: P0604 Int...

DIAGNOSTIC RESPONSE:Use default sump temperature CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) performs an internal memory self-test at power up that writes and reads patterns at specific RAM locations to verify...

Allison 3000 & 4000 Gen 4 Fault Code: P0602 TCM...

DIAGNOSTIC RESPONSE:Lock in Neutral CIRCUIT DESCRIPTION:At power up and after clearing DTC, the Transmission Control Module (TCM) performs a self-test to determine if the calibration in memory is valid. CONDITIONS...