Checking resistances and wires (Vehicles with engine code AFP)
- Checking resistances and wires (Vehicles with engine code BDF). See CHECKING RESISTANCES AND WIRES (VEHICLES WITH ENGINE CODE BDF) .
Knock Sensor (KS) 1 -G61-
- Disconnect white 3 -pin harness connector for knock sensor 1 (arrow).
Courtesy of VOLKSWAGEN OF AMERICA, INC.
Knock Sensor (KS) 2 -G66-
- Disconnect brown 3 -pin harness connector for knock sensor 2 (arrow).
- Measure resistance between terminals 1 + 2, 1 + 3, and 2 + 3 at connectors to knock sensors.
Specified value: INFINITY Ω
- Connect test box to control module wiring harness. See CONNECT TEST BOX FOR WIRING TEST .
- Check wires between test box and 3-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Courtesy of VOLKSWAGEN OF AMERICA, INC.
Wire resistance: max: 1.5 Ω
Checking Knock Sensors Chart (Engine Code AFP)Component Connector Test box Knock Sensor (KS) 1 -G61- Terminal 1 Socket 106 Terminal 2 Socket 99 Terminal 3 Socket 108 Knock Sensor (KS) 2 -G66- Terminal 1 1 Socket 107 Terminal 2 Socket 99 Terminal 3 Socket 108 - Also check wires for short circuit to each other.
Specified value: INFINITY Ω
If no malfunctions are found in wires:
- Replace the respective knock sensor:
- Erase DTC memory of Engine Control Module (ECM). See DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA .
- Generate readiness code. See READINESS CODE, GENERATING .