Vauxhall Workshop Service and Repair Manuals

No.

TECH 1-Display

Conditions for Checking

Nominal Value

Trouble Codes

Terminal

03

SELECT ADJUSTMN. IAC BLM

Engine running at idle speed

Engine throttle valve CLOSED (accelerator pedal in idle position)

Vehicle stationary

Press key F6 in the system main menu, select the desired test using the arrow keys and confirm with YES.

Follow the instructions in the TECH 1 display.

IAC INTEGRATOR

128 STEPS

IAC BLOCK LEARN

128 STEPS

Note:

In this mode, it is possible to reset the above mentioned engine learn parameters using the arrow keys, i. e. to set them to 128 steps.

The learn parameters indicate the short - term and long - term behaviour of the idle speed adjuster control circuit. If a fault occurs in this circuit, these values taper off upwards or downwards.

If the fault in the idle speed adjuster control circuit is eliminated in the workshop, the learn parameters return to the normal value of 128 steps. This process may however take several minutes.

Note:

For this reason, it is possible to reset the parameters directly to the normal value of 128 steps using this TECH 1 mode. The engine should then still be run for some time to check that the idle speed adjuster control circuit has been correctly repaired.

The reset is triggered by the ARROW UP key. In addition, the various data list parameters can be displayed via the YES and NO keys. Key F9 can be used to store data as in the snapshot mode.

Notes on Trouble - shooting:

Nominal Value:

Cause of Fault:

·   See F0: DATA LIST, test steps 37 to 44