Vauxhall Workshop Service and Repair Manuals

Immobiliser Control Unit, Remove and Install  

  Important!   

If the control unit is replaced, it must be reprogrammed - see corresponding Checking Procedures.  

Notice: 

Due to the existence of different versions of the ignition lock housing there are two different assembly sequences.  

When being replaced, immobiliser control units without tabs can be exchanged for ones with tabs. For control units with tabs new ignition lock screens are necessary. These can also be used on control units without tabs.  

Version 1: Ignition lock housing without tabs  

  Remove, Disconnect   

Remove signal switch panelling - 5 fastening bolts (arrows).   Disconnect ignition key and ignition lock cover. Disconnect wiring harness plug from immobiliser control unit. Unclip immobiliser control unit from ignition lock housing and pull forwards.     1  Immobiliser control unit   2  Ignition lock cove   3  Transponder key   4  Transponder   5  Lock cylinder   6  Ignition lock housing

  Install, Connect   

Slide immobiliser control unit onto ignition lock housing and clamp tightly.  

Connect wiring harness plug (2) to immobiliser control unit.   Place on ignition lock cover (1).   Install signal switch panelling.

Version 2: ignition lock housing with tabs.  

  Remove, Disconnect   

Remove signal switch panelling.  

Remove ignition key (3) and ignition lock screen (2).   Remove lock barrel (4).   Extract immobiliser control unit (1) from ignition lock housing (5).   Release wiring harness plug and disconnect.     Install, Connect    Connect wiring harness plug.   Slide immobiliser control unit over ignition lock housing.   Install lock barrel.   Fit ignition lock screen and signal switch panelling