Vauxhall Workshop Service and Repair Manuals

Transmission Control Unit

The transmission control unit is located in the right footwell, near the A pillar. The control unit functions of the AR 25/35 in the Omega-B correspond on the whole to those of the Omega-A/Carlton and Senator-B.

Important modifications are:

·  Engine version coding

·  Adapted characteristic curves

·  New trouble codes

·  Stored trouble codes are retained after disconnection

Diagnostic Plug

Readout of trouble codes can now only be performed using TECH 1; diagnostic plug XD is located in the fuse box.