S80 T6 L6-2.9L Turbo VIN 91 B6294T (2002)
Activate buttons and read status on cruise-control switch unit buttons.
If read-out gave a correct result the fault is in the cable between the audio/telephone switch unit and cruise-control switch unit.
Additional information:
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To access cruise control switch unit see RTI switch See: Steering Mounted Controls Assembly/Service and Repair/RTI Switch.
Did read-out of status on cruise-control switch unit give a correct result?
Yes - FAULT FOUND
No - Checking the wires and components
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Checking the wires and components
Check the voltage between B1 and B3. The voltage should be approximately 12V.
Check the voltage between B2 and B3. The voltage should be approximately 5V.
Check voltage between B3 and battery negative lead. The voltage should be approximately 0V.
If voltages measured above are OK, the fault is in the cruise-control switch unit.
Additional information:
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To connect the test box, see Connecting the breakout box See: Pinout Values and Diagnostic Parameters/Connecting the Breakout Box
