Operation and maintenance manual

Section 120-0010
Transmission - Transmission and Mounting
SM 2124 Rev 3 8-03
22
Fault MEANING OF CODE TCU reaction Checks Remarks
Code possible reason for fault detection
(hex)
D5
ERROR AT SWITCH 1 FOR VALVE POWER SUPPLY VPS1 shift to neutral •check fuse
TCU switched on VPS1 and measured VPS1 is off or OP-Mode: TCU shutdown •check cables from
TCU switched off VPS1 and measured VPS1 is still on gearbox to TCU
• cable or connectors are defect and are contacted to •check connectors from
battery voltage gearbox to TCU
• cable or connectors are defect and are contacted to •replace TCU
vehicle ground
• permanent power supply KL30 missing
• TCU has an internal defect
D6
ERROR AT SWITCH 2 FOR VALVE POWER SUPPLY VPS2 shift to neutral •check fuse
TCU switched on VPS2 and measured VPS2 is off or OP-Mode: TCU shutdown •check cables from
TCU switched off VPS2 and measured VPS2 is still on gearbox to TCU
• cable or connectors are defect and are contacted to •check connectors from
battery voltage gearbox to TCU
• cable or connectors are defect and are contacted to •replace TCU
vehicle ground
• permanent power supply KL30 missing
• TCU has an internal defect
E3
S.C. TO BATTERY VOLTAGE AT DISPLAY OUTPUT no reaction •check cable from TCU
TCU sends data to the display and measures always a OP-Mode: normal to the display
high voltage level on the connector. •check connectors at
• cable or connectors are defect and are contacted to the display
battery voltage •change display
• display has an internal defect
E4
S.C.TO GROUND AT DISPLAY OUTPUT no reaction •check cable from TCU
TCU sends data to the display and measures always a OP-Mode: normal to the display
high voltage level on the connector. •check connectors at
• cable or connectors are defect and are contacted to the display
vehicle ground •change display
• display has an internal defect
F1
GENERAL EEPROM FAULT no reaction •replace TCU often shown
TCU cannot read non volatile memory OP-Mode: normal together with fault
• TCU is defective code F2
F3
APPLICATION ERROR transmission stay neutral • replace TCU fault occurs only if
something of this application is wrong OP-Mode: TCU shutdown a test engineer did
something wrong in
the application of
the vehicle
F5
CLUTCH FAILURE transmission stay neutral •check clutch TCU shows also the
AEB was not able to adjust clutch filling parameters OP-Mode: TCU shutdown affected clutch on
• One of the AEB-Values is out of limit the Display
F6 C
LUTCH ADJUSTMENT DATA LOST TCU shifts to neutral •execute AEB
TCU was not able to read correct clutch adjustment OP-Mode: limp home
parameters
• interference during saving data on non volatile
memory
• TCU is brand new or from another vehicle