Checking Cruise Control disengagement
Symptom: The Cruise Control does not disengage when the TCS function is activated
or the brakes are applied.
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Checking Cruise Control disengagement
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Fault symptom
The Cruise Control does not disengage when the TCS function is activated
or the brakes are applied.
Diagnostic procedure
1.
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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
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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.
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2.
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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
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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".
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