Vauxhall Workshop Service and Repair Manuals

Trouble-shooting:                                      Nominal Value:                       Cause of Fault:

(If nominal value is not attained)

· Remove control unit plug                                        Closed loop systems:                          · Incorrect wiring harness installed

cable cover                                                                Ter. 20 unoccupied,

5V

· Ignition ON                                                                Open loop systems:                            · Control unit defective

Ter. 20 grounded,

· Check Ter. 20 at control unit                                  0V

optically and with multimeter

Note:           To remove the control unit plug cable cover, 3 bolts must be loosened and the cover pulled off upwards.

When doing this, do not disconnect the control unit from the wiring harness if possible, as this may delete stored trouble codes.