B-6 Allison Transmission Other Features
DOB 1300-1556
PA-1639 Operator's Manual 2020 X3-45 Commuter
DIAGNOSTIC TROUBLESHOOTING CODES (DTC) LIST - ALLISON 5
TH
GENERATION
CONTROLS
DTC
Description
CHECK
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 Circuit Low Voltage
No
Use
default
throttle
values. Freezes shift
adapts.
P0123
Pedal Position Sensor Circuit High Voltage
No
Use
default
throttle
values. Freezes shift
adapts.
P0218
Transmission Fluid Over Temperature
Yes
Use default sump temp
P0562
System Voltage Low
No
Inhibit TCC Operation,
DNA
P0602
TCM Not Programmed
Yes
Lock in Neutral
P0604
Control module random access memory (RAM)
Yes
Lock in Neutral
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)
P0642
Sensor Reference Voltage "A" Circuit Low
Yes
Default
sensor
data
used
P0643
Sensor Reference Voltage "A" Circuit High
Yes
Default
sensor
data
used
P0657
Actuator Supply Circuit Voltage 1 Open (HSD 1)
Yes
SOL OFF, DNA, Inhibit
TCC operation, Inhibit
main modulation
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)
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