Vauxhall Workshop Service and Repair Manuals

This test step serves as a learning and checking value to understand the system better and to evaluate the system on external influences.

The injection period is composed of several elements which have an influence on the size of the signal. If the measurement values of the following test steps deviate from the nominal values (see quick check), trouble-shooting is to be carried out.

Test Step                     Test of                                                         Further additional causes of trouble are:

No.:

· Lead interruptions from

01                                  BATTERY VOLTAGE                              - Fuel pump relay Ter. 87 (+) to the injection valves

05                                  INT. MANIFOLD V.                                  - Control unit Ter. 37 to the injection valves

06                                  COOLANT TEMP.

07                                  AIR FLOW SENSOR                              · Pressure regulator defective

09                                  TPS SIGNAL                                            · Jammed injection valves

10                                  ENGINE LOAD SIG.                              · Electromagnetic disturbances caused by

14                                  ENGINE SPEED                                         - Ignition leads (increase distance to wiring harness)

29                                  O2 SENSOR                                                 - Alternator (worn carbon brushes produce sparks)

30                                  O2 INTEGRATOR

31                                  O2 BLM IDLE THR.                               · Control unit defective