Vauxhall Workshop Service and Repair Manuals

Trouble-shooting:                          Nominal Value:                       Cause of Fault:

(If nominal value is not attained)

· Start engine                                                Eng. speed signal received ---->     · Check reference signal (Hall sensor) from distributor

Read off cranking speed                         Engine starts                            ---->     · Check EST signal

from TECH 1.

· Measure voltage at                                                                                                  · Connecting line from control unit K 100 Ter. B 5

reference signal B 5                    ---->     approx. 6 ~ V                                          to distributor pin 2 interrupted or short circuit

from distributor and EST signal D 4--> approx. 3 ~ V                                          to ground.

with multimeter (20 V/DC).                                                                                     - Distributor defective

Ignition stage K 20 Ter. 4                                                                                       - Connecting line from control unit K 100 Ter. D 4

or                                                                                                                                       to ignition module pin 4 interrupted or short

display image of REF signal                    Square signal                                          circuit to ground.

and EST signal on oscilloscope.             visible.                                                  - Ignition module defective.

· Select TECH 1 mode "F7", submode    Engine speed increases                    · Carry out test step 06

"F0" and increase and decrease            and decreases

idle speed using arrow keys.

· Idle speed too high or rough.                                                                               · Loose contact in throttle valve potentiometer