Allison

Allison 3000 & 4000 Gen 4 Fault Code: P2669 Act...

DIAGNOSTIC RESPONSE:SOL OFF, Inhibit TCC operation, Inhibit main modulation, DNA CIRCUIT DESCRIPTION:The high side drivers are connected to the high side circuits of the solenoids and commanded on during normal...

Allison 3000 & 4000 Gen 4 Fault Code: P2641 Tor...

DIAGNOSTIC RESPONSE:Inhibit LRTP CIRCUIT DESCRIPTION:Lower Range Torque Protection (LRTP) is an Engine Management function that reduces engine torque when transmission input power, input torque, converter torque output, or converter speed...

Allison 3000 & 4000 Gen 4 Fault Code: P2637 Tor...

DIAGNOSTIC RESPONSE:Inhibit SEM CIRCUIT DESCRIPTION:Shift Energy Management (SEM) allows the Transmission Control Module {TCM) to request torque reduction from the engine controller. By reducing torque, shifts can be made quicker...

Allison 3000 & 4000 Gen 4 Fault Code: P2185 Eng...

DIAGNOSTIC RESPONSE:Use default coolant engine values CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) receives an input from an Engine Coolant Temperature (ECT) sensor. The TCM supplies a 5V reference voltage signal...

Allison 3000 & 4000 Gen 4 Fault Code: P2184 Eng...

DIAGNOSTIC RESPONSE:Use default engine coolant values CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) receives an input from an Engine Coolant Temperature (ECT) sensor. The TCM supplies a 5V reference voltage signal...

Allison 3000 & 4000 Gen 4 Fault Code: P1892 Thr...

DIAGNOSTIC RESPONSE:Use default throttle values CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) can be calibrated to receive a Pulse Width Modulation (PWM) TPS pedal position signal. NOTE: A throttle source can...