CIRCUIT DESCRIPTION:This DTC sets when the TCM detects no communication on the CAN1 backbone harness for a period of time....

CIRCUIT DESCRIPTION:This DTC sets when the TCM detects no communication on the CAN2 backbone harness for a period of time....

CIRCUIT DESCRIPTION:This test detects the loss of certain messages from the CAN Bus. ACTION TAKEN WHEN THE DTC SETS:1. The...

Allison 1000 & 2000 Gen 4 Fault Codes: P1688 Unmanaged Engine Torque Delivered To TCM Signal CIRCUIT DESCRIPTION:The GM 8.1...

Allison 1000 & 2000 Gen 4 Fault Codes: P0122 Pedal Position Sensor Circuit Low Voltage CIRCUIT DESCRIPTION:The Transmission Control Module...

Allison 1000 & 2000 Gen 4 Fault Codes: P0123 Pedal Position Sensor Circuit High Voltage CIRCUIT DESCRIPTION:The Transmission Control Module...