Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN1994GOLF (1H1) L4-1.8L (ACC) CANREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE FULL CLOSE SWITCHTESTING AND INSPECTION
1994 Volkswagen Golf (1H1) L4-1.8L (ACC) Can
Throttle Full Close Switch: Testing and Inspection
1994 Volkswagen Golf (1H1) L4-1.8L (ACC) CanSECTION 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
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
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.