Checking the ON/OFF function

Conditions For On/Off
The following conditions must be fulfilled before activation of the ON/OFF function in the Cruise Control system control module will be possible: ON/OFF
Pin A (1): 12 V
Pin B (2): 12 V
Pin C (3): 12 V

1 Connect the BOB and check that a supply of approx. 12 V is present on pins A (1), B (2) and C (3) of the Cruise Control connector when ON/ OFF is held in the depressed position.
Measure across the pins and a good ground.





2 If the voltage readings are not correct, check whether a 12 V supply is present across connection 7 of the switch and a good ground.
If the voltage is OK, continue with point 4.
3 If there is no voltage, check the wiring for continuity or a short circuit by measuring the resistance across the load side of the fuse and pin 7 of the switch connector.
If the resistance is > 1 ohm, remedy the fault.
4 Check the switch by keeping it in the ON/OFF position and measuring the resistance across pins 7 and 8, across pins 7 and 9, and across pins 7 and 10.
If the resistance obtained during any measurement is > 1 ohm, install a new switch.





5 If the resistance is <=1 ohm, check the wiring for continuity or a short circuit by measuring the resistance across:
- pin 10 of the switch connector and pin B of the Cruise Control connector.
- pin 9 of the switch connector and pin C of the Cruise Control connector.
- pin 8 of the switch connector and pin A of the Cruise Control connector.
If the resistance is > 1 ohm, rectify the fault.
6 If no fault has been detected in the above checks, continue fault diagnosis in Before Control Module Replacement.