Vauxhall Workshop Service and Repair Manuals

Table 3, Code Tables

 

In order to reduce the number of different variants of control unit in production and customer service (reduced storage costs), codings are required.

 

By this means, the number of control units for all variants can be reduced to one unit.

 

The appropriate characteristic curves of the individual variants (e.g. transmission type, air conditioning, octane number, etc.) are preprogrammed in the software of the control unit.

 

The appropriate characteristic curves can be activated by coding or by reassigning the octane number plug.

 

The following table shows all Motronic M 2.5 control unit variations for Kadett-E/Astra/Belmont and Vectra/Cavalier.

 

 

Table 3, Control Unit Specifications

 

Vehicle	Engine	BOSCH	Sticker	OPEL
		Parts No.		Parts No.
Kadett-E/Astra/Belmont	20 XE, C 20 XE	0 261 200 185/186	FP	90 299 569
Vectra/Cavalier	20 XEJ, C 20 XE	0 261 200 191/192	FX	90 324 334

 

 

Wiring Harness Coding

 

In order to reduce the number of different variants of control unit in production and customer service (reduced storage costs), wiring harness codings are required.

 

By this means, the number of control units for Kadett-E/Astra/Belmont and Vectra/Cavalier can be limited to 3 basic control units (see Control Unit Specifications)

 

The appropriate characteristic curves of the individual variants (e.g. transmission type, air conditioning, exhaust types and foreign versions) are preprogrammed in the software of the basic control units and are activated by the corresponding wiring harness coding.

 

The given terminal designations refer to the 55-pin control unit plug.

 

Designation of Transmission Versions:

 

Manual transmission version:

 

Ter. 21 Unoccupied

Ter. 42 Against ground

 

 

Designation of Air Conditioning Version

 

Vehicles without AC                                                                                         Vehicles with AC

 

Ter. 41 Occupied on control unit side, unoccupied on vehicle side                  Ter. 41 Compressor relay

Ter. 40 Occupied on control unit side, unoccupied on vehicle side                  Ter. 40 Compressor switch

 

 

Designation of Exhaust Versions

 

Ter. 20 Unoccupied      -------->--------           US'83 - regulation (open loop catalytic converter)

Ter. 20 To ground         -------->--------           ECE R 15.04

 

 

Speedometer Signal:

 

Ter. 9 is connected to the odometer frequency sensor.

The odometer frequency sensor is only installed in Motronic vehicles together with the board computer, LCD instrument or electronic speedometer.

 

 

Ignition Plug Coding

 

Model	Engine	Plug Coding	Colour	Label	Resistance
Kadett-E/Astra/	20 XE			A	470 Ohm
Belmont	20 XEJ	90 307 657	brown
Vectra/Cavalier	C 20 XE			B	220 Ohm
	C 20 XE			A	0 Ohm
	Switzerland	90 307 658	blue
	Version			B	¥ Ohm

 

 

Note:

 

The coding plugs may only be operated in position "A".

A change to position "B" is not permissible.