| Test | TECH 1 | Notes | Nominal Values | Possible |
|---|---|---|---|---|
| Step | Display | Trouble | ||
| No. | Codes | |||
| 29 | TORQUE CONTROL | Engine idling | ||
| MT vehicle: | INACTIVE 5V | |||
| AT vehicle idling: | INACTIVE 5V | |||
| AT vehicle driven and | ||||
| with automatic shifting:** | ACTIVE 0V | 75 |
Note: On vehicles* with AT the engine torque is reduced via the pre-ignition during shifting.
If trouble code 75 is stored and the actual value display does not correspond with the nominal values on vehicles with AT, then the transmission does not shift automatically any more but must be shifted by hand.
Before disconnecting the transmission control unit make sure that trouble codes were read out and noted.
* Only with Vectra/Cavalier, Senator, Omega 3000/Carlton GSi 3000
** Recognisable on TECH 1 display only with full load acceleration.
Trouble-shooting: Nominal Value: Cause of Trouble:
(If nominal value not attained)
Ignition OFF
· Remove transmission control unit > 4.9 V · Interruption from Motronic control
from wiring harness unit Ter. 8 to transmission control unit
| K 85 | K 70 |
|---|---|
| Pin 13 | 18 |
Ignition ON
· Check voltage at transmission · Short circuit against ground in
control unit plug K 85/Ter. 13 or Motronic control unit lead Ter. 8 to
K 70/Ter. 18 with multimeter transmission control unit
| K 85 | K 70 |
|---|---|
| Pin 13 | 18 |
· Motronic control unit defective
· Place K 85/Ter. 13 or K 70/Ter. 18 Trouble code 75 · Motronic control unit defective
on transmission control unit plug
against ground
Start engine
Read out fault memory
· Measure voltage at transmission 9.5 to 10.5 V · Interruption or short to ground
control unit plug K 70/Ter. 19 (dependent on from Motronic control unit Ter. 21
or K 85/Ter. 29 with engine engine speed) to transmission control unit
operating using multimeter
| K 85 | K 70 |
|---|---|
| Pin 29 | 19 |
· Motronic control unit defective
If nominal values attained · Transmission control unit defective
* Transmission control unit K 85 with Vectra/Cavalier
K 70 with Senator-B, Omega 3000/Carlton GSi 3000