Throttle Full Close Switch: Adjustments

CLOSED THROTTLE POSITION SWITCH CHECK

The Closed Throttle Position Switch (CTP Switch) is electrically closed (continuity) when the throttle valve is closed (at idle), and electrically open (no continuity) as soon as the throttle is opened.

Throttle Position Sensor:

1. Disconnect harness connector from the CTP Switch / Throttle Position Potentiometer (TP Potentiometer), located on the side of the throttle body.

Closed Throttle Position Switch Terminal ID:

2. Using suitable multimeter set to resistance range, and throttle valve closed (idle position) check for continuity between CTP Switch terminals 4 and 6.

^ Must be approximately 0 ohms (continuity)

^ IF NOT, CTP Switch adjustment is needed

3. Open throttle valve approximately 10% of travel, check for continuity between CTP Switch terminals 4 and 6.

^ Must be infinite ohms (open)

^ IF NOT or only when throttle is opened more than 10% of travel, CTP Switch adjustment is needed

CLOSED THROTTLE POSITION SWITCH ADJUSTMENT PROCEDURE

NOTE: ^ Adjusting the CTP Switch also adjusts the TP Potentiometer.

1. Loosen both screws on the CTP Switch.

Closed Throttle Position Switch Adjustment:

2. Turn CTP switch in direction of arrow (see image) until stop is reached.

^ Throttle valve (throttle linkage) must not be moved

3. Tighten CTP Switch mounting screws in this position.
6. Check CTP Switch resistance readings again as outlined above in CTP SWITCH CHECK procedure.

4. If specified resistance values cannot be obtained after adjusting, replace CTP Switch.