Knock Sensor (KS) 1-G61 and Knock Sensor (KS) 2-G66, Checking

Knock Sensor (KS) 1-G61 and Knock Sensor (KS) 2-G66, Checking


NOTE:
- It is not possible to carry out an electrical test of the knock sensors themselves. Use function "Check DTC memory".
- To ensure that the knock sensors function properly it is important to keep exactly to the specified tightening torque of 20 Nm (15 ft lb)
- Use only gold-plated terminals when repairing the terminals in the plug connectors for the knock sensors.
- Check for corrosion in connection between knock sensor and wiring harness.


Checking knock sensors
- Disconnect harness connector for relevant knock sensor in engine compartment.







- Check for short circuits between all three terminals in knock sensor connector (terminals 1 + 2, 1 + 3 and 2 + 3).

Specification: There must be no contact between the wires (infinite Ohms).

If there is a connection between the terminals.
- Replace knock sensor.

If there is no short circuit
- Check wiring for knock sensors.

Checking wiring between knock sensors and engine control module
- Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG1598/31 Test Box" Testing and Inspection












- Check wiring connection from relevant sensor connector to engine control module for open circuit and/or short to B+ or Ground (GND).

Resistance in wiring: max. 1.5 ohm

- Repair any open/short circuit as necessary.
- Display readiness code. If DTC memory was erased generate readiness code.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Readiness Code" Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" Testing and Inspection