|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
26
|
TORQUE CONTROL
|
Apply parking brake
Engine running at idle speed,
operating temperature
Selector lever in "P"
or "N"
Driving in "Sport
Program"
Accelerate
Shift selector lever from
"1" to "2"
|
INACTIVE
ACTIVE
|
75
|
13,
35
|
|
Trouble-shooting:
|
Nominal Value:
|
Cause of
Fault:
(If nominal
value is not attained)
|
|
· Ignition OFF
· Disconnect from
transmission control unit wiring harness plug
|
|
|
|
· Measure voltage:
from: transmission control unit wiring harness plug Ter. 13
to: ground, Ter. 31
|
less than 0.1
V
|
· Short circuit to voltage
from: transmission control unit wiring harness plug Ter. 13
to: corresponding terminal of relevant engine control unit
|
|
Note:
The voltage for the following measurement is either in the
range from 0 to 5 V (e.g.: Motronic M 2.8) or in the range from 0 to 12 V
(e.g.: Multec CIS).
|
|
|
|
· Ignition ON
· Measure voltage:
from: transmission control unit wiring harness plug Ter. 13
to: ground, Ter. 31
|
greater than 4 V
or
greater than 10 V
(but less than 12 V!)
|
If voltage is less than 1 V:
· Short circuit to ground
from: transmission control unit wiring harness plug Ter. 13
to: corresponding terminal of relevant engine control unit
· Circuit interruption
from: transmission control unit wiring harness plug Ter. 13
to: corresponding terminal of relevant engine control unit
· Engine control unit
defective
|
|
|
|
If voltage
is greater than 12 V
(battery
voltage):
· Short circuit to voltage
from: transmission control unit wiring harness plug Ter. 13
to: corresponding terminal of relevant
engine control unit
· Engine control unit
defective.
|
|
· Ignition OFF
· Reconnect control unit
wiring harness plug
· Ignition ON
· Using TECH 1 select test
step 26:
|
INACTIVE
|
· Transmission control unit
defective.
|
|
Note:
The following measurements are
made with the wiring harness plug connected. Wiring harness plug terminal 13
is connected to ground from the rear, the wiring harness side, using the
probes from Electronic Kit KM-609.
|
|
|
|
· Reconnect control unit wiring harness
plug
from: transmission
control unit wiring harness plug Ter. 13
to: ground,
Ter. 31
Note:
The Data List parameter in question may perform differently
for the above check in some engine control units. This must be used to
recognize an engine control unit malfunction.
|
ACTIVE
|
· Transmission control unit defective.
|
|
|
|
|
|
|
|
|
