Section 120-0010
Transmission - Transmission and Mounting
SM 1965 4-00
12
Fault MEANING OF CODE TCU reaction Checks Remarks
Code possible reason for fault detection
(hex)
26 S.C. TO GROUND AT TRANSMISSION SUMP TEMPERATURE SENSOR no reaction, •check cable from TCU to
INPUT TCU uses default temp. sensor
the measured voltage is too low: OP-Mode: normal •check connectors
•
cable is defective and is contacted to vehicle ground •check temperature sensor
•
temperature sensor has an internal defect
•
connector pin is contacted to vehicle ground
27 S.C. TO BATTERY VOLTAGE OR O.C. AT RETARDER no reaction, •check cable from TCU to
TEMPERATURE SENSOR INPUT TCU uses default temp. sensor
the measured voltage is too high: OP-Mode: normal •check connectors
•
cable is defective and is contacted to battery voltage •check temperature sensor
•
cable has no connection to TCU
•
temperature sensor has an internal defect
•
connector pin is contacted to battery voltage or is
broken
28 S.C. TO GROUND AT RETARDER TEMPERATURE SENSOR INPUT no reaction, •check cable from TCU to
the measured voltage is too low: TCU uses default temp. sensor
•
cable is defective and is contacted to vehicle ground OP-Mode: normal •check connectors
•
temperature sensor has an internal defect •check temperature sensor
•
connector pin is contacted to vehicle ground
31 S.C. TO BATTERY VOLTAGE OR O.C. AT ENGINE SPEED INPUT OP-Mode: substitute clutch •check cable from TCU to
TCU measures a voltage higher than 7.00 V at speed control sensor
input pin •check connectors
•
cable is defective and is contacted to battery voltage •check speed sensor
•
cable has no connection to TCU
•
speed sensor has an internal defect
•
connector pin is contacted to battery voltage or has
no contact
32 S.C. TO GROUND AT ENGINE SPEED INPUT OP-Mode: substitute clutch •check cable from TCU to
TCU measures a voltage less than 0.45V at speed input control sensor
pin •check connectors
•
cable/connector is defective and is contacted to •check speed sensor
vehicle ground
•
speed sensor has an internal defect
33 LOGICAL ERROR AT ENGINE SPEED INPUT OP-Mode: substitute clutch •check cable from TCU to This fault is reset after
TCU measures a engine speed over a threshold and the control sensor power up to TCU
next moment the measured speed is zero •check connectors
•
cable / connector is defective and has bad contact •check speed sensor
•
speed sensor has an internal defect •check sensor gap
•
sensor gap has the wrong size
34 S.C. TO BATTERY VOLTAGE OR O.C. AT TURBINE SPEED INPUT OP-Mode: substitute clutch •check cable from TCU to
TCU measures a voltage higher than 7.00 V at speed control sensor
input pin if a failure is existing at •check connectors
•
cable is defective and is contacted to battery voltage output speed, •check speed sensor
•
cable has no connection to TCU TCU shifts to neutral
•
speed sensor has an internal defect OP-Mode: limp home
•
connector pin is contacted to battery voltage or has
no contact
35 S.C. TO GROUND AT TURBINE SPEED INPUT OP-Mode: substitute clutch •check cable from TCU to
TCU measures a voltage less than 0.45V at speed control sensor
input pin if a failure is existing at •check connectors
•
cable / connector is defective and is contacted to output speed, •check speed sensor
vehicle ground TCU shifts to neutral
•
speed sensor has an internal defect OP-Mode: limp home
36 LOGICAL ERROR AT TURBINE SPEED INPUT OP-Mode: substitute clutch •check cable from TCU to This fault is reset after
TCU measures a turbine speed over a threshold and control sensor power up of TCU
at the next moment the measured speed is zero if a failure is existing at •check connectors
•
cable / connector is defective and has bad contact output speed, •check speed sensor
•
speed sensor has an internal defect TCU shifts to neutral •check sensor gap
•
sensor gap has the wrong size OP-Mode: limp home
Courtesy of Machine.Market
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