Pinpoint Test 3: The Speed Control Does Not Disengage When The Brakes Are Applied
Pinpoint Test 3: The Speed Control Does Not Disengage When The Brakes Are AppliedNOTE: Tapping the brake pedal deactivates the speed control. It is necessary to apply the brakes in order to slow the vehicle down.
Normal Operation
Voltage for the speed control servo clutch (internal to the speed control actuator) is supplied by the smart junction box (SJB) to the speed control deactivator switch through circuit (V/BR). The speed control deactivator switch (closed when the brake pedal is not applied) then routes the voltage to circuit (WO) to the speed control actuator. When the brake pedal is firmly pressed, the speed control deactivator switch opens and voltage is no longer supplied to the speed control servo clutch.
Possible Causes
- Wiring, terminals or connectors
- Obstructions to the accelerator pedal or linkage
- Speed control deactivator switch
- Stoplamp switch
- Speed control cable
- Accelerator cable
- Speed control actuator
Diagnostic Procedure
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Step 1-Step 3:
Step 4-Step 5:
