Allison

Allison 3000 & 4000 Gen 4 Fault Code: P2812 Pre...

DIAGNOSTIC RESPONSE:DNS, SOL OFF (hydraulic default) CIRCUIT DESCRIPTION:Pressure Control Solenoid 6 (PCS6) is a normally closed solenoid used to apply to C6 clutch in Low (L) range (7-speed models only)....

Allison 3000 & 4000 Gen 4 Fault Code: P2809 Pre...

DIAGNOSTIC RESPONSE:DNS, RPR CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses input from the turbine speed and output speed sensors to determine the current commanded for steady-state gear ratio. The TCM...

Allison 3000 & 4000 Gen 4 Fault Code: P2808 Pre...

DIAGNOSTIC RESPONSE:DNS, RPR CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses input from the turbine speed and output speed sensors to determine the current commanded for steady-state gear ratio. The TCM...

Allison 3000 & 4000 Gen 4 Fault Code: P2793 Gea...

DIAGNOSTIC RESPONSE:Ignores PWM input from shift selector CIRCUIT DESCRIPTION:The OEM 4th Generation Controls shift selectors communicates with the Transmission Control Module (TCM) by exchanging standardized digital messages over the SAE...

Allison 3000 & 4000 Gen 4 Fault Code: P278A Kic...

DIAGNOSTIC RESPONSE:Inhibit kickdown operation CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) can be calibrated to receive an acceleration pedal kickdown input from either an analog input wire or a digital datalink...

Allison 3000 & 4000 Gen 4 Fault Code: P2789 Clu...

DIAGNOSTIC RESPONSE:None CIRCUIT DESCRIPTION:The Transmission Health Monitor is (TM) is part of the 4th Generation Control System Prognostics package. This feature monitors adaptively learned clutch volume changes. These volumes are...