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 MANUALSVOLKSWAGEN2003PASSAT SEDAN (3B3) L4-1.8L TURBO (AWM)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCAMSHAFT POSITION SENSORTESTING AND INSPECTION
2003 Volkswagen Passat Sedan (3B3) L4-1.8L Turbo (AWM)
Camshaft Position Sensor: Testing and Inspection
2003 Volkswagen Passat Sedan (3B3) L4-1.8L Turbo (AWM)SECTION Testing and Inspection
Camshaft Position (CMP) Sensor, Checking
Special tools and equipment
- VAG 1598/31 adapter cable
- VAG 1526 multimeter or VAG 1715 multimeter
- VAG 1594 connector test kit
- Wiring diagram
Test requirement
- Battery voltage must be at least 11.5 volts.
Test sequence
- Disconnect 3-pin connector -1- from Camshaft Position (CMP) sensor -2-.
- Use adapter cables from VAG 1594 to connect multimeter to outer terminals of connector for voltage measurement.
- Switch ignition on. Specification: at least 4.5 V
- Switch ignition off.
- Connect VAG 1598/31 adapter cable to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check for open circuits in wires between test box and connector according to wiring diagram.
Terminal 1 + socket 98
Terminal 2 + socket 86
Terminal 3 + socket 108
Wire resistance: max: 1.5 Ohms
- Check wires for shorts among one another.
If no errors are found in the wires and there was voltage between terminals 1 + 3:
- Replace Camshaft Position (CMP) Sensor 2 -G163-.
If no errors are found in wires and there was no voltage between terminals 1 + 3:
- Replace Engine Control Module (ECM).
RENDER: 1.0x
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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.