Section 120-0010
Transmission - Transmission and Mounting
SM 1965 4-00
14
Fault
MEANING OF CODE
TCU reaction
Checks
Remarks
Code
possible reason for fault detection
(hex)
57
EEC1
TIMEOUT
OP-Mode: substitute clutch
•
check EEC controller
Timeout of CAN-message EEC1 from EEC controller
control
•
check wire of CAN-Bus
•
interference on CAN-Bus
•
check cable to EEC
•
CAN wire/connector is broken
controller
•
CAN wire/connector is defective and has contact to
vehicle ground or battery voltage
58
EEC3
TIMEOUT
OP-Mode: substitute clutch
•
check EEC controller
Timeout of CAN-message EEC3 from EEC controller
control
•
check wire of CAN-Bus
•
interference on CAN-Bus
•
check cable to EEC
•
CAN wire/connector is broken
controller
•
CAN wire/connector is defective and has contact to
vehicle ground or battery voltage
65
ENGINGE
TORQUE
SIGNAL
OP-Mode: substitute clutch
•
check engine controller
CAN signal for engine torque is defective
control
•
check wire of CAN-Bus
•
engine controller is defective
•
check cable to engine
•
interference on CAN-Bus
controller
66
KICKDOWN
SIGNAL
no reaction
•
check engine controller
CAN signal for kickdown is defective
•
check wire of CAN-Bus
•
engine controller is defective
•
check cable to engine
•
interference on CAN-Bus
controller
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
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