Vauxhall Workshop Service and Repair Manuals

No.

TECH 1 Display

Conditions for Checking

Nominal Value

Trouble Codes

Ter-

minal

19

COOLANT TEMP.SW.

Automatic transmission AF 14/20 with installed

coolant temperature switch, connected to Ter. 11 of control unit (Model Year '89 with EI Plus engine control units)

Ignition ON

Engine cold

Apply parking brake

Selector lever in P N

Engine running at idle speed, operating temperature

Coolant temperature higher than 75 °C/167 °C

Continued overleaf

OPEN         12 V

CLOSED      0 V

15, 23

11, 35

19

COOLANT TEMP.SW.

(continued)

Automatic transmission AF 13 / 14 / 20 without installed coolant temperature switch

(control unit Ter. 11 grounded)

Ignition ON

Note:

In the AF 22 automatic transmission, the control unit

Ter. 11 is not connected to the coolant temperature switch. Ter. 11 of the transmission control unit is connected to Ter. 42 of the Motronic control unit

(C 25 XE engine with Motronic M 2.8). This lead transfers information about the P/N switch position to the Motronic control unit. See test step 28. TECH 1 displays "NOT USED" for the presently selected parameter.

CLOSED      0 V

15, 23

11, 35