Operation and maintenance manual

Section 120-0010
15
SM 2124 Rev 3 8-03
Transmission - Transmission and Mounting
Fault MEANING OF CODE TCU reaction Checks Remarks
Code possible reason for fault detection
(hex)
69
REFERENCE ENGINE TORQUE SIGNAL OP-Mode: substitute clutch •check engine controller
CAN signal for reference of engine torque is defective control •check wire of CAN-Bus
• engine controller is defective •check cable to engine
• interference on CAN-Bus controller
6A
ACTUAL ENGINE TORQUE SIGNAL OP-Mode: substitute clutch •check engine controller
CAN signal for actual engine torque is defective control •check wire of CAN-Bus
• engine controller is defective •check cable to engine
• interference on CAN-Bus controller
6B
NOM FRICTION TORQUE SIGNAL OP-Mode: substitute clutch •check engine controller
CAN signal for nominal friction torque is defective control •check wire of CAN-Bus
• engine controller is defective •check cable to engine
• interference on CAN-Bus controller
6E EEC2
TIMEOUT no reaction •check EEC controller
Timeout of CAN-message EEC2 from EEC controller TCU uses default signal •check wire of CAN-Bus
• interference on CAN-Bus accelerator pedal in idle •check cable to EEC
• CAN wire/connector is broken position controller
• CAN wire/connector is defective and has contact to OP-Mode: normal
vehicle ground or battery voltage
6F
ACCELERATOR LOW IDLE SWITCH SIGNAL no reaction • check EEC controller if this signal is not
CAN signal for manual downshift is defective TCU uses default signal •check wire of CAN-Bus transmitted via CAN,
• EEC controller is defective accelerator pedal in idle •check cable to EEC TCU uses default
• interference on CAN-Bus position controller signal
OP-Mode: normal
71
S.C.TO BATTERY VOLTAGE AT CLUTCH K1 TCU shifts to neutral •check cable from TCU to
1)
see figure 8
the measured resistance value of the valve is out of OP-Mode: limp home gearbox
limit, the voltage at K1 valve is too high. if failure at another • check connectors from
• cable / connector is defective and has contact to clutch is pending TCU to gearbox
battery voltage TCU shifts to neutral •check regulator resistance
1)
• cable / connector is defective and has contact to OP-Mode: TCU shutdown •check internal wire
another regulator output of the TCU harness of the gearbox
• regulator has an internal defect
72
S.C. TO GROUND AT CLUTCH K1 TCU shifts to neutral •check cable from TCU to
1)
see figure 8
the measured resistance value of the valve is out of OP-Mode: limp home gearbox
limit, the voltage at K1 valve is too low. if failure at another • check connectors from
• cable / connector is defective and has contact to clutch is pending gearbox to TCU
vehicle ground TCU shifts to neutral •check regulator resistance
1)
• regulator has an internal defect OP-Mode: TCU shutdown • check internal wire
harness of the gearbox
73
O.C. AT CLUTCH K1 TCU shifts to neutral •check cable from TCU to
1)
see figure 8
the measured resistance value of the valve is out of OP-Mode: limp home gearbox
limit. if failure at another • check connectors from
• cable / connector is defective and has no contact to clutch is pending gearbox to TCU
TCU TCU shifts to neutral •check regulator resistance
1)
• regulator has an internal defect OP-Mode: TCU shutdown • check internal wire
harness of the gearbox
74
S.C.TO BATTERY VOLTAGE AT CLUTCH K2 TCU shifts to neutral •check cable from TCU to
1)
see figure 8
the measured resistance value of the valve is out of OP-Mode: limp home gearbox
limit, the voltage at K2 valve is too high. if failure at another • check connectors from
• cable / connector is defective and has contact to clutch is pending gearbox to TCU
battery voltage TCU shifts to neutral •check regulator resistance
1)
• cable / connector is defective and has contact to OP-Mode: TCU shutdown •check internal wire
another regulator output of the TCU harness of the gearbox
• regulator has an internal defect