Vauxhall Workshop Service and Repair Manuals

No.

TECH 1 Display

Conditions for Checking

Trouble Codes

Terminal

02

DIMMER

Ignition ON, switch off all consumers

-

7/2

VOLTAGE

Turn instrument illumination dimmer potentiometer in both directions to stop:

INACTIVE  0V

MID illuminates brightly

26-polig

Switch on radio

Turn instrument illumination dimmer potentiometer in both directions to stop:

INACTIVE 0V

MID illuminates brightly

Switch on parking lamps

Turn instrument illumination dimmer potentiometer in both directions to stop:

Bottom stop

INACTIVE

2,5 to 3,6 V

MID dark

Top stop

ACTIVE

approx. 13.5 V

MID brightness changes

Notes for Trouble-shooting:

Nominal Value:

Cause of Fault:

(If nominal value is not attained)

·   Ignition OFF

·   Remove instrument assembly

·   Release 26-pin wiring harness plug and disconnect from MID

·   Ignition ON

·   Measure voltage between Ter. 6

lower than 1 V

·   Lamp switch assy. S 2.1 defective

    and ground:

·   Lead from S 2.1/Ter. 58K via fuse F26 to 26-pin MID wiring harness plug Ter. 6 has short circuit to + battery voltage

·   Switch on parking lamps

·   Measure voltage between 26-pin

higher than 11 V

·   Fuse F26 defective

    MID wiring harness plug Ter. 6 and  

·   Lamp switch assy. S 2.1 defective

    ground:

·   Lead from S 2.1/Ter. 58K via F26 to 26-pin MID wiring harness plug Ter. 6 is interrupted or lead has short circuit to ground

·   Measure voltage between 26-pin MID wiring harness plug Ter. 7 and ground:

Bottom stop

2,9 to 3,6 V

Top stop

11,5 to 13,5 V

·   Lead from S2.3/Ter. 58d to instrument Ter. 8 or to 26-pin MID wiring harness plug Ter. 7 is interrupted or has short circuit to ground

·   Dimmer potentiometer S2.3 defective

If nominal values are attained:

·   MID defective