Vauxhall Workshop Service and Repair Manuals

No.

TECH 1-DISPLAY

Conditions for Checking

Nominal Value

Trouble Codes

Terminal

34

TORQUE CONTROL

Vehicles with AT:

-

43

Constant speed

Transmission shifts

0 mg/ stroke greater than 0 mg/ stroke

Vehicles with MT:

0 mg/ stroke

Note:

The automatic transmission sends a request to the engine control unit to reduce the injection quantity during shifting. As TECH 1 cannot up-date the data quickly enough, the change to the parameter value on the display cannot be observed.

Trouble-shooting

Nominal Value

Cause of Fault:

(If nominal value is not attained)

·   Ignition OFF

·   Disconnect wiring harness plug from DDE control unit K70

·   Disconnect wiring harness plug from AT control unit K85

·   Ignition ON

·   Using multimeter, measure voltage

from:       wiring harness plug for DDE control unit K70 Ter. 43

to:           ground

lower than 0.1 V

·   Short circuit to voltage

from:       wiring harness plug for DDE control unit K70 Ter. 43

to:           wiring harness plug for automatic transmission K85 Ter. 4

·   Ignition OFF

·   Using multimeter, measure resistance

from:       wiring harness plug for DDE control unit K70 Ter. 43

to:           ground

greater than 100 kW (¥)

·   Short circuit to ground

from:       wiring harness plug for DDE control unit K70 Ter. 43

to:           wiring harness plug for automatic transmission control unit K85 Ter. 4

·   Using multimeter, measure resistance

from:       wiring harness plug for DDE control unit K70 Ter. 43

to:           wiring harness plug for automatic transmission control unit K85 Ter. 4

lower than 2 W

·   Circuit interruption

from:       wiring harness plug for DDE control unit K70 Ter. 43

to:           wiring harness plug for automatic transmission control unit K85 Ter. 4

If nominal values are attained

·   DDE control unit K70 defective

or

·   Automatic transmission control unit K85 defective

Note:

Before replacing the control unit, check the automatic transmission control unit for function (see Checking Procedures for Electronic 4-speed Automatic Transmission).