Vauxhall Workshop Service and Repair Manuals

Table 10, Checking Cross - linked Electronic Systems

 

General

 

To improve driveability and ensure a high standard of safety, vehicle electronic systems are linked to one another with data and control leads.

This process is called cross - linking.

 

For example, the engine and transmission management systems are cross - linked to provide smoother shifting.

 

The following individual systems are cross - linked:

 

-      Engine management, automatic transmission, ABS / TC, air conditioning, board computer and instrument panel

 

-      Air conditioning and auxiliary fans

 

-      Central door locking system and anti - theft warning system / immobilizer, electr. window winders, electr. sliding roof

 

-      MID (Multi lnfo Display), radio, CD changer

 

 

Checking; General

 

The self - diagnosis function of modern electronic systems means that they are capable of monitoring their own system and the interfaces to other systems. They are however not capable of understanding and evaluating faults in connected systems.

This means that, in the most unfavourable circumstances, faults in one system may cause subsequent faults in systems connected to it.

 

Checking

 

The following lists all FO: DATA LIST test steps which may be set if there is a malfunction in the cross - linking, e. g.

 

-      faults in driveability

 

-      telltale of one or more connected systems illuminates

 

Observe notes in relevant Checking Procedures when checking.

 

 

Table 10, Checking Cross - linked Electronic Systems

 

No.	TECH 1 Display	Equipment	Remarks	Trouble Codes	Terminal
09	VEHICLE SPEED	All vehicles		-	9, 19
10	VEHICLE SP. PULSE	All vehicles		-	9, 19
11	A / C INFORMAT. SW	Vehicles with AC		-	41, 19
12	A / C COMPRESS. SW	Vehicles with AC		-	40, 19
13	PARK / NEUTRAL SW.	Vehicles with AT		-	42, 19
14	TORQUE CONTROL	Vehicles with AT		75, 76	51, 19
20	A / C CUTOFF RELAY	Vehicles with AC		87, 88	25, 19