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Key Recognition Circuit > < System Voltage Circuit

Vectra B

 

 

 

 

C-04, Immobiliser circuit function  

C-04, Immobiliser circuit function  

Test  

Instructions  

Nominal value  

T01  

Measure resistance  

 

 

•  Disconnect wiring harness plug (28 pin) from anti-theft warning system control unit & central door locking K94  

•  Disconnect wiring harness plug from immobiliser control unit K117  

•  Measure resistance between wiring harness plug K94/terminal 23 and wiring harness plug  
K117/terminal 1  
 
 
 

 
 
 
 
Lower than 2 Ω  
 

 

Yes:   E01  

No:   T02  

T02  

Measure resistance  

 

 

•  Disconnect wiring harness plug (28 pin) from anti-theft warning system control unit & central door locking K94  

•  Separate instrument panel wiring harness plug &  
body X1  

•  Measure resistance between wiring harness plug X1/terminal 68 (pin) and wiring harness plug K94/terminal 23  
 
 
 

 
 
 
 
Lower than 2 Ω  
 

 

Yes:   E03  

No:   E02  

 

C-04, Immobiliser circuit function  

No.  

Result  

E01  

•  Anti-theft warning system control unit & central door locking K94 defective  

 

  or  

 

•  Immobiliser control unit K117 defective  
 
 
 

E02  

•  Interruption in lead between anti-theft warning system wiring harness plug & central door locking K94/terminal 23 and instrument panel wiring harness plug & body X1/terminal 68  
 
 
 

E03  

•  Interruption in lead between instrument panel wiring harness plug & body X1/terminal 68 and immobiliser control unit wiring harness plug K117/terminal 1  
 
 
 

 

 
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Key Recognition Circuit > < System Voltage Circuit