LEMON Manuals: Even more car manuals for everyone
Home >> Jaguar >> 2000 >> XJ8 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P0133: Ho2S Sensor Circuit Slow Response (Bank 1, Upstream 1) >> Diagnostic Test Procedure

Diagnostic Test Procedure

  1. Disconnect negative battery cable. Disconnect the HO2S connector. Disconnect the ECM connector EM82. Measure resistance between HO2S harness connector terminal No. 3 and ECM harness connector EM82 terminal No. 4. Is resistance greater than 5 ohms? If yes, repair high resistance between HO2S harness connector terminal No. 3 and ECM harness connector EM82 terminal No. 4. If no, go to next step.
  2. Reconnect negative battery cable. Turn ignition on. Measure voltage between ECM harness connector EM82 terminal No. 4 and ground. Is voltage greater than 1 volt? If yes, repair the short to voltage. If no, go to next step.
  3. Turn ignition off. Measure resistance between ECM harness connector EM82 terminal No. 4 and ground. Is resistance less than 10,000 ohms? If yes, repair the short to ground. If no, go to next step.
  4. Measure resistance between HO2S harness connector terminal No. 4 and ECM harness connector EM82 terminal No. 10. Is resistance greater than 5 ohms? If yes, repair high resistance between HO2S harness connector terminal No. 4 and ECM harness connector EM82 terminal No. 10. If no, go to next step.
  5. Measure voltage between HO2S harness connector terminal No. 4 and ground. Is voltage greater than 1 volt? If yes, repair short to voltage. If no, go to next step.
  6. Measure resistance between HO2S harness connector terminal No. 4 and ground. Is resistance less than 10,000 ohms? If yes, repair short to ground. If no, install a new HO2S. See HEATED OXYGEN SENSOR (HO2S) under ENGINE SENORS in REMOVAL, OVERHAUL & INSTALLATION article. If DTC resets, possible ECM failure.
scientia non olet · About LEMON Manuals