Crankshaft Position Sensor
NOTE:
All voltage and continuity tests should be performed with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless specifically stated differently in testing procedures. For help with diagnostic testing. See WIRING DIAGRAMS .
Location of Crankshaft Position (CKP) sensor and harness connection. See COMPONENT LOCATIONS .
- Disconnect CKP sensor harness connector (Black). See Fig 1.
- Using DVOM, switched to resistance range. Connect DVOM to terminals No. 1 and 2, using adapter cables from (VW1594). Resistance must be approximately 1000 ohms. See Fig 2.
- If resistance is not correct, replace CKP sensor. If YES: Connect DVOM to terminals No. 1 and 3 and then terminals No. 2 and 3. Both must be infinite ohms (open). If NO: Replace CKP sensor.
- If YES: Check wiring between sensor harness connector and Engine Control Module (ECM).
- Connect (VAG 1598) test box using (VAG 1598/5) adaptor cable connected to ECM wiring harness. See CONNECTING VAG 1598 TEST BOX . ECM remains disconnected.
- Check the following terminals for continuity and/or short circuit(s):
- Between sensor harness connector terminal No. 1 and test box socket 48.
- Between sensor harness connector terminal No. 2 and test box socket 47.
- Between sensor harness connector terminal No. 3 and test box socket 19 (ground).See Figure.
- If okay, check sensor pin on ring gear. Remove bracket with CKP sensor and Engine Speed (RPM) sensor. Rotate engine until reference pin appears in starter opening. Inspect pin for looseness, damage or bent condition; replace if necessary.
- If okay, replace ECM. After replacement of ECM, see ECM IDENTIFICATION and ECM CODING under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS article.