Vauxhall Omega B Workshop and Repair Manuals | Service Manuals

General Information on Checking

 

When checking with TECH 1, observe the following sequence:

 

 

F2:TROUBLE CODE

 

The control unit of each electronic system monitors the system for incorrect performance.

If a fault is recognised, the control unit stores a trouble code which can be shown on the TECH 1 display with the function F2:TROUBLE CODE.

Stored trouble codes can only be deleted using TECH 1.

 

 

F0:DATA LIST

 

The function F0:DATA LIST allows the current conditions of the monitored signals to be read out. The values displayed by TECH 1 can be compared with the nominal values in the F0:DATA LIST table.

 

 

·   If the actual values deviate from the nominal values, the table provides instructions on elimination of the fault.

 

 

·   If TECH 1 displays the message "NOT PRESENT", the displayed parameter is not evaluated by the system.

 

 

·   When the "ENTER" key is pressed, the number of the current test step is shown at the top right corner of the display.

 

 

F5:ACTUATOR TEST

 

Using the actuator test, the actuators (e.g. lamps, relay, servo motors ...) of the tested system are actuated by TECH 1 and subjected to a function check.

During the actuator test, the control unit of the system being tested is set various parameters by TECH 1. For this reason, always reinitialise the system by switching the ignition off and on again after completion of the actuator test.

 

 

F3:SNAPSHOT

 

The snapshot function should be used if the preceding measures did not reveal a malfunction, although a complaint was made by the customer.

For snapshots, recreate the circumstances which, according to the customer, lead to the occurrence of the fault.

The snapshot function can also be used for localisation of sporadic faults.

 

 

F6:ADJUSTMENTS

 

TECH 1 can be used to set adjustments to the vehicle system.

This option is not used by the systems treated in these Checking Procedures

 

 

F4:CLEAR CODES

 

This program module function is used to delete the trouble codes and alarm codes stored in the control unit.

 

 

F7:PROGRAMMING

 

The control unit can be adapted to specific circumstances by programming contents of the memory.

(Programming keys for central door locking system, entering country codes for the anti-theft warning system)

 

 

F8:ECU CONTROL

 

In this operation mode, TECH 1 controls the control unit being checked.

(Opening or closing the sun roof)

 

 

Final System Check

 

 

After completing repairs, the system should be subjected to a final check. Observe the following procedure:

 

 

·   Switch ignition off and on again (system is reinitialised)

 

 

·   Delete trouble codes (F4:CLEAR CODES)

 

 

·   Switch ignition off and on again (system is reinitialised)

 

 

·   Read trouble codes (there must be no trouble codes)

 

 

·   Check data list parameters (F0:DATA LIST)

 

 

·   Recreate driving situation in which, according to the customer, the fault occurred.

     (the complaint must not reoccur)

 

 

Notes

 

·   For test steps in which wiring harness plug contacts are connected to the ground or battery voltage (+12 V) , proceed with the utmost care and concentration.

     An incorrectly selected contact can lead to destruction of internal circuits in the control unit in question.

 

 

·   After disconnecting the battery, reprogram the:

 

 

electric window winders

electric sun roof

clock/display

radio coding.