Home/Jaguar/XJR/Jaguar XJR II (1994-2003)/Repair manual/Testing & Diagnostics/DTC P0117: ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW IN…
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DTC P0117: ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW INPUT (XJ SERIES) Jaguar XJR II

  1. Turn ignition off. Disconnect Engine Coolant Temperature (ECT) sensor harness connector. (Схема №5) Measure resistance between ECT sensor terminals. If resistance is more than 30,000 ohms, replace ECT sensor and retest system. If resistance is 30,000 ohms or less, go to next step.
  2. Disconnect ECM harness connector EM11. Check continuity of Blue/Yellow wire between ECT sensor harness connector and ECM harness connector EM11 terminal No. 9. (Схема №3) If continuity exists, go to next step. If continuity does not exist, repair open in Blue/Yellow wire and retest system.
  3. Disconnect mass airflow sensor and throttle assembly harness connectors. Disconnect ECM harness connector EM10. Check continuity of Black/Green wire between ECT sensor harness connector, ECM harness connector EM11 terminal No. 12 and ECM harness connector EM10 terminal No. 20. If continuity exists, go to next step. If continuity does not exist, repair open in Black/Green wire and retest system.
  4. Turn ignition on. Measure voltage between ECM harness connector EM11 terminals No. 9 (Blue/Yellow wire) and No. 12 (Black/Green wire). If voltage is more than one volt, repair short to voltage and retest system. If voltage is one volt or less, system is okay.