Operation and maintenance manual

Section 120-0010
17
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)
84
S.C. TO BATTERY VOLTAGE AT CLUTCH KV 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 KV 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
85
S.C. TO GROUND AT CLUTCH KV 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 KV 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
86
O.C. AT CLUTCH KV 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
87
S.C.TO BATTERY VOLTAGE AT CLUTCH KR 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 KR 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
88
S.C. TO GROUND AT CLUTCH KR 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 KR 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
89
O.C. AT CLUTCH KR 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
91
S.C. TO GROUND AT RELAY REVERSE WARNING ALARM backup alarm will be on •check cable from TCU to
1)
see figure 8
TCU detected a wrong voltage at the output pin, that until TCU power down backup alarm device
looks like a s.c. to vehicle ground even if fault vanishes •check connectors from
• cable is defective and is contacted to vehicle ground (loose connection) backup alarm device to
• backup alarm device has an internal defect OP-Mode: normal TCU
• connector pin is contacted to vehicle ground •check resistance
1)
of
backup alarm device
92
S.C. TO BATTERY VOLTAGE AT RELAY REVERSE WARNING ALARM no reaction •check cable from TCU to
1)
see figure 8
TCU detected a wrong voltage at the output pin, that OP-Mode: normal backup alarm device
looks like a s.c. to battery voltage •check connectors from
• cable is defective and is contacted to battery voltage backup alarm device to
• backup alarm device has an internal defect TCU
• connector pin is contacted to battery voltage •check resistance
1)
of
backup alarm device