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Diagnosis with TECH 1 > < Checking with Diagnostic Switch KM-640

Corsa B

Types of Fault

 

The anti-theft warning system control unit has two memories ("A" and "B") reserved for each anticipated trouble code. This allows 4 different types of fault to be represented.

 

The following combinations are possible:

 

FAULT TYPE

number

Contents of memory     "A"             "B"

FAULT TYPE

description

1

---                        0                 0

No fault present

2

"Loose contact"              0                 1

Fault present but conditions for setting fault not yet fulfilled

3

"Not present "                 1                 0

Condition for setting fault was fulfilled.

Fault was or is present, but cannot be recognised under operating conditions

4

"Present"                        1                 1

Fault is present. Condition for setting fault fulfilled

LED in hazard warning lamps switch flashes when arming.

 

Fault type no. 2 is evaluated by TECH 1 for recognition of short-term faults (loose contacts).

 

Faults from fault type no. 3 are reset to type no. 1 by the anti-theft warning system control when the system is armed/disarmed 20 times; i.e. the fault is deleted.

 

Diagnosis with TECH 1 > < Checking with Diagnostic Switch KM-640