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Jetta L4-1781cc 1.8L SOHC (ACC) Can (1995)

Powertrain Management > Sensors and Switches - Powertrain Management > Sensors and Switches - Fuel Delivery and Air Induction > Closed Throttle Position Switch <--> [Throttle Full Close Switch] > Component Information > Locations > Page 2067

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Closed Throttle Position Switch: Testing and Inspection

Closed Throttle Position (CTP) Switch, checking/adjusting 

Checking 

Note: 

^  The CTP switch gap can only be checked and adjusted when the plunger is fully retracted.
^  Use VAG 1655 adapter to retract the plunger.
^  The adapter reduces the Battery Positive Voltage (B+) by about 6 Volts.

 
 

Switch ignition OFF.

Disconnect CTP Switch.

Connect VAG 1655 adapter to CPT switch and Battery Positive Voltage (B+).

Touch adapter wire (-) to Ground (GND) until plunger -arrow- is fully retracted.

Note:  The Throttle Body has no Ground (GND) connection.

Push plunger in by hand to stop.

Check gap -a- with feeler gauge and adjust if necessary using screw -1-.
^  Checking value 0.40-0.50 mm (0.016-0.020 in.) 
^  Adjusting value 0.50 mm (0.020 in.)

Operation, checking 

Switch multimeter to resistance range -Ohm-.

CAUTION! Switch multimeter to the appropriate measuring range before connecting the test leads to avoid damaging the electronic components.

Connect lower terminals of CTP switch using jumper wires from VW 1594 adapter kit.

Resistance:
^  Feeler gauge NOT inserted: infinite Ohms
^  Feeler gauge inserted: 200 Ohms maximum

Powertrain Management > Sensors and Switches - Powertrain Management > Sensors and Switches - Fuel Delivery and Air Induction > Closed Throttle Position Switch <--> [Throttle Full Close Switch] > Component Information > Locations > Page 2067

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