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Home >> Jaguar >> 1996 >> XJS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics >> Self-Diagnostic Tests >> DTC P0116: ECT Sensor Range/Performance
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DTC P0116: ECT Sensor Range/Performance

NOTE: After each repair, clear DTCs. See CLEARING CODES/PCM RESET PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Turn ignition off and then on. Read DTCs to verify repair is complete. For DLC and PCM connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  .
  1. Using scan tool, read DTCs. If DTC P0116 is present, go to next step. If DTC P1116 is not present, problem may be intermittent. See the following:
    • For 1995 models, see INTERMITTENTS in TESTS W/O CODES article.
    • For 1996 models, see INTERMITTENTS in TESTS W/O CODES article.
    • For 1997 XJR models, see INTERMITTENTS in TESTS W/O CODES article.
    • For 1997 XJ6 models, see INTERMITTENTS in TESTS W/O CODES article.
  2. Turn ignition off. Check and adjust coolant level as necessary. If coolant level is okay, check and repair coolant temperature gauge operation as necessary. If gauge is okay, go to next step.
  3. Remove thermostat and check thermostat operation. Replace thermostat if necessary. If thermostat is okay, disconnect ECT sensor and go to next step.
  4. Using DVOM, check Blue/Yellow wire for continuity between ECT sensor harness connector and PCM harness connector. Repair wiring as necessary. If wiring is okay, go to next step.
  5. Check Black/Brown wire (XJR and XJ6) or Black/Gray wire (XJS) for continuity between ECT sensor harness connector and PCM harness connector. Repair wiring as necessary. If wiring is okay, go to next step.
  6. Check if ECT sensor Blue/Yellow wire is shorted to Black/Brown wire (XJR and XJ6) or Black/Gray wire (XJS). Repair wiring as necessary. If wiring is okay, go to next step.
  7. Check resistance across ECT sensor terminals. Resistance should be 2045 ohms with coolant at 68°F (20°C), 318 ohms at 176°F (80°C), or 142 ohms at 230°F (110°C). If sensor does not test as specified, replace ECT sensor. If sensor tests as specified, go to next step.
  8. Clear DTCs. Turn ignition off and then on. Read DTCs. If DTC P0116 is not present, repair is complete. If DTC P0116 is present, replace PCM.
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