Appendix C - Allison Diagnostic Troubleshooting Codes; Diagnostic Troubleshooting Codes (Dtc) List - Allison 5 - PREVOST X3-45 COACH 2018 Operator's Manual

Appendix C – Allison Diagnostic Troubleshooting Codes
CATEGORY OF RESPONSE
DNS - Do Not Shift
SOL OFF - SOLenoid
OFF
RPR - Return to
Previous Range
NNC - Neutral No
Clutches
DNA - Do Not Adapt

DIAGNOSTIC TROUBLESHOOTING CODES (DTC) LIST - ALLISON 5

DTC
C1312 Retarder Request Sensor Failed Low
C1313 Retarder Request Sensor Failed High
P0122 Pedal Position Sensor Circuit Low Voltage
P0123 Pedal Position Sensor Circuit High Voltage
P0218 Transmission Fluid Over Temperature
P0562
System Voltage Low
P0602 TCM Not Programmed
P0604
Control module random access memory (RAM)
P0614 Torque Control Data Mismatch - ECM/TCM
P0634 TCM Internal Temperature Too High
P0642 Sensor Reference Voltage "A" Circuit Low
P0643
Sensor Reference Voltage "A" Circuit High
P0657 Actuator Supply Circuit Voltage 1 Open (HSD 1)
P0658 Actuator Supply Voltage 1 (HSD1) Low
P0659 Actuator Supply Voltage 1 (HSD1) High
Release lock up (LU) clutch and inhibit lock up operation.
Inhibit shifts from the current attained range.
Turn on the CHECK light.
Display the current attained range in the MONITOR window of the shift
selector.
Blank the SELECT window of the shift selector.
Ignore any range selection inputs from the shift selector.
All solenoids are commanded off, resulting in hydraulic default operation of
the transmission – PCS1 & PCS2 are on hydraulically when off electrically.
When the speed sensor ratio or PS1 tests do not pass, the TCM commands
the same range as commanded before the shift.
When certain speed sensor ratio or PS1 tests do not pass, the TCM a
neutral condition with no clutches applied.
The TCM stops adaptive shift control while the code is active.
Description
PA1627 X3-45 Operator's Manual
ACTIONS TAKEN
TH
GENERATION CONTROLS
CHECK Inhibited Operation
Light
May inhibit retarder operation if not
No
using J1939 datalink
May inhibit retarder operation if not
No
using J1939 datalink
Use default throttle values. Freezes
No
shift adapts.
Use default throttle values. Freezes
No
shift adapts.
Yes Use default sump temp
No Inhibit TCC Operation, DNA
Yes Lock in Neutral
Yes Lock in Neutral
Allows operation only in reverse and
Yes
second range.
Yes SOL OFF (hydraulic default)
Yes Default sensor data used
Yes
Default sensor data used
SOL OFF, DNA, Inhibit TCC
Yes
operation, Inhibit main modulation
Yes DNS, SOL OFF (hydraulic default)
Yes DNS, SOL OFF (hydraulic default)
9
Description