Engine Speed Sensor: Testing and Inspection

Engine Speed (RPM) sensor, checking


NOTE: Component locations


Required special tools and test equipment
- VAG 1598/22 test box
- Multimeter US 1119 (Fluke 83 or equivalent)
- VW 1594 connector test kit
- Wiring diagram

Checking
- Disconnect 3-pin harness connector from engine speed sensor.
- Connect VAG 1598/22 test box to ECM harness connector.Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/22 Test Box" Testing and Inspection







- Check wiring for open circuit between ECM/test box and 3-pin harness connector.
- Connector terminal 1 to ECM/test box socket 67
- Connector terminal 2 to ECM/test box socket 63
- Connector terminal 3 to ECM/test box socket 56
- Specified value: max. 1.5 Ohms

- Check wiring for short circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
- Connector terminal 2 to ECM/test box socket 67
- Connector terminal 1 to ECM/test box socket 63
- Connector terminal 1 to ECM/test box socket 56
- Specified value: Infinity Ohms

If wiring is OK:
- Replace engine speed (RPM) sensor -G28-.
- Check readiness code.If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.
Refer to "Moniters, Trips and/or Drive Cycle (Readiness Codes)/Checking Readiness Code" Testing and Inspection
Refer to "Moniters, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code Testing and Inspection