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Troubleshooting
Transmission Control Module (TCM), Diagnostic Trouble Codes
(DTCs)
Note: For some DTCs, after the component repair is made,
the code may not change to inactive status until the component
is activated.
Transmission Control Module, Fault Tracing
“P1050, Transmission Range, Position”, page 5
“P1051, Transmission Splitter, Position”, page 6
“P1052, Clutch Cylinder, Position”, page 7
“P1053, Clutch Plates Wear, Condition”, page 9
“P1054, Transmission Tank, Air Pressure”, page 9
“P1055, Brake Switch Status”, page 9
“U3003, TCM Power Supply”, page 10
“P1057, Main Shaft Speed Sensor (SESM)”, page 10
“P1058 Counter Shaft Speed Sensor”, page 14
“P1059, Gearbox Oil Temperature Sensor”, page 17
“P105E, Transmission Shifter # 1 Position Sensor”, page 18
“P105F, Transmission Shifter # 2 Position Sensor”, page 18
“P1060, Clutch Load on Plate”, page 19
“P1061, Clutch Cylinder Slip Point Position”, page 19
“P1062, Clutch Position Sensor Supply + 5V”, page 20
“U3000, PCB Temperature Sensor”, page 20
“U0300, J1939 Communication”, page 21
“U3000, Program Memory”, page 20
“U3000, Calibration Memory EEPROM”, page 21
“U3000, Digital Input Flash NVRAM Programming Enable (DIEE)”, page 20
“P1063, Transmission Inclination Sensor”, page 21
“P1064, Clutch Fast Engagement Valve”, page 22
“P1065, Clutch Slow Engagement Valve”, page 23
“P1066, Clutch Fast Disengagement Valve”, page 24
“P1067, Clutch Fast Disengagement Valve”, page 25
“P1068, Fast Clutch Valves, Low Side Circuit”, page 25
“P1069, Slow Clutch Valves, Low Side Circuit”, page 26
“P106A, Gear 1 Valve, Inner Actuator for Shift Cylinder 1”, page 26
“P106B, Gear Reverse Valve, Outer Actuator for Shift Cylinder 1”, page 27