Allison

Allison 1000 & 2000 Gen 5 Fault Code:P2641 Torq...

CIRCUIT DESCRIPTION:LRTP protects the transmission during low vehicle speed conditions. When an engine torque rating exceeds a predetermined value, LRTP limits engine torque in lower ranges to protect the transmission...

Allison 1000 & 2000 Gen 5 Fault Code:P2637 Torq...

CIRCUIT DESCRIPTION:SEM allows the TCM to request torque reduction from the engine controller. By reducing torque, shifts can be made quicker, at a more consistent output torque which reduces clutch...

Allison 1000 & 2000 Gen 5 Fault Code:P1892 Thro...

CIRCUIT DESCRIPTION:The TCM can be calibrated to receive throttle information from a Pulse Width Modulated (PWM) signal. DTC P1891 sets when the TCM detects PWM throttle signal greater than calibrated...

Allison 1000 & 2000 Gen 5 Fault Code:P1891 Thro...

CIRCUIT DESCRIPTION:The TCM can be calibrated to receive throttle information from a PWM signal. DTC P1891 sets when the TCM detects PWM throttle signal less than calibrated percent for a...

Allison 1000 & 2000 Gen 5 Fault Code:P1790 Gear...

CIRCUIT DESCRIPTION:This DTC sets if the TCM determines the primary shift selector calibration is invalid. ACTION TAKEN WHEN THE DTC SETS:1. The CHECK TRANS light illuminates.2. DTC is stored in...

Allison 1000 & 2000 Gen 5 Fault Code:P0980 Shif...

CIRCUIT DESCRIPTION:SS3 is a Normally Closed (N/C) solenoid that provides control main pressure to stroke Shift Valve 3 (SV3) to attain a particular range needed for the next upshift or...