PREVOST X3-45 - Allison Transmission Diagnostic Troubleshooting Codes (Dtc) and Descriptions

Technical Information 134
ALLISON TRANSMISSION DIAGNOSTIC TROUBLESHOOTING CODES (DTC) AND DESCRIPTIONS
DTC Description
CHECK
TRANS
Light
Inhibited Operation
Description
C1312 Retarder Request Sensor Failed Low No
May inhibit retarder operation if not
using J1939 datalink
C1313 Retarder Request Sensor Failed High No
May inhibit retarder operation if not
using J1939 datalink
P0122 Pedal Position Sensor Low Voltage No
Use default throttle values. Freezes
shift adapts.
P0123 Pedal Position Sensor High Voltage No
Use default throttle values. Freezes
shift adapts.
P0218 Transmission Fluid Over Temperature No
Use hot mode shift schedule. Holds
fourth range. TCC is inhibited.
Freezes shift adapts.
P0602 TCM Not Programmed Yes Lock in Neutral
P0610 TCM Vehicle Options (Trans ID) Error Yes Use TID A calibration
P0613 TCM Processor No All solenoids off
P0614 Torque Control Data Mismatch - ECM/TCM Yes
Allows operation only in reverse and
second range.
P0634 TCM Internal Temperature Too High Yes SOL OFF (hydraulic default)
P063E Auto Configuration Throttle Input Not Present Yes Use default throttle values
P063F
Auto Configuration Engine Coolant Temp Input Not
Present
No None
P0658 Actuator Supply Voltage 1 (HSD1) Low Yes DNS, SOL OFF (hydraulic default)
P0659 Actuator Supply Voltage 1 (HSD1) High Yes DNS, SOL OFF (hydraulic default)
P0702 Transmission Control System Electrical (TransID) Yes Use TID A calibration
P0703 Brake Switch Circuit Malfunction No
No Neutral to Drive shifts for refuse
packer. TCM inhibits retarder
operation if a TPS code is also
active.
P0708 Transmission Range Sensor Circuit High Input Yes Ignore defective strip selector inputs
P070C Transmission Fluid Level Sensor Circuit – Low Input No None
P070D Transmission Fluid Level Sensor Circuit – High Input No None
P0711
Transmission Fluid Temperature Sensor Circuit
Performance
Yes Use default sump temp
P0712 Transmission Fluid Temperature Sensor Circuit Low Input Yes Use default sump temp
P0713 Transmission Fluid Temperature Sensor Circuit High Input Yes Use default sump temp
P0716 Turbine Speed Sensor Circuit Performance Yes DNS, Lock in current range
P0717 Turbine Speed Sensor Circuit No Signal Yes DNS, Lock in current range
P0719 Brake Switch ABS Input Low No TCM assumes ABS is OFF
P071A RELS Input Failed On Yes Inhibit RELS operation
P071D General Purpose Input Fault Yes None
P0721 Output Speed Sensor Circuit Performance Yes DNS, Lock in current range
P0722 Output Speed Sensor Circuit No Signal Yes DNS, Lock in current range
P0726 Engine Speed Sensor Circuit Performance No Default to turbine speed
P0727 Engine Speed Sensor Circuit No Signal No Default to turbine speed
P0729 Incorrect 6
th
Gear Ratio Yes DNS, Attempt 5
th
, then 3
rd
P0731 Incorrect 1
st
Gear ratio Yes DNS, Attempt 2
nd
, then 5
th
P0732 Incorrect 2
nd
Gear ratio Yes DNS, Attempt 3
rd
, then 5
th