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Checking Cruise Control disengagement

Symptom: The Cruise Control does not disengage when the TCS function is activated or the brakes are applied.

Checking Cruise Control disengagement


Fault symptom

The Cruise Control does not disengage when the TCS function is activated or the brakes are applied.



Diagnostic procedure


1. Connect the ISAT and select "BRAKE LIGHT SWITCH" in the "OBTAIN READOUTS" menu. Check that the switch is in proper working order. If it is, proceed to point 2.

If it is not, check the operation of the brake light switch as described in Service Manual 3:2.

Warning

The car can be jacked up to activate the TCS function. Proceed with the outmost caution if this method is chosen. If only the front of the car is raised and supported on stands, the handbrake must always be applied and nobody should stand in front of the car or beside the front wheels while the test is in progress. Speed should be restricted to the minimum possible above 4 km/h.


2. Select "DISENG CRUISE CONT" in the "OBTAIN READOUTS" menu and check that the Cruise Control system is disengaged when the TCS function is activated or the brakes are applied.



Note

The TCS lamp comes on about 1 second before disengagement occurs. If it works correctly, check the lead from pin 5 of the TCS control module to pin G of the Cruise Control for continuity/shorting. If there is a malfunction, see "Before replacing a control module".