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 MANUALSVOLKSWAGEN2002GOLF GLS, 2.0 K, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 99 (2.0L - GENERIC SCAN TOOL, ENGINE CODE(S): AEG (A4 PLATFORM))28 - IGNITION/GLOW PLUG SYSTEMIGNITION, SERVICINGKNOCK SENSOR (KS) 1 G61 / KNOCK SENSOR (KS) 2 G66 , CHECKING
2002 Volkswagen Golf GLS, 2.0 K, Standard
Knock Sensor (KS) 1 G61 / Knock Sensor (KS) 2 G66 , checking
2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION Knock Sensor (KS) 1 G61 / Knock Sensor (KS) 2 G66 , checking
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 Volkswagen Jetta, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, 2000 Volkswagen GTI, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
The following procedure is used to diagnose all Knock Sensors.
Special tools, testers and auxiliary items required
- Multimeter.
- Wiring diagram.
Test requirements
- The mounting bolt of Knock Sensor (KS) 1 G61 / Knock Sensor (KS) 2 G66 tightened to 20 Nm.
- The Motronic Engine Control Module (ECM) J220 fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
- Perform a preliminary check to verify the customers complaint. Refer to → Motronic Engine Control Module (ECM) J220 , replacing
Start diagnosis
- Remove the engine cover with air filter.
NOTE:
- Before disconnecting the Knock Sensor electrical harness connectors, mark the component location.
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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.