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Home >> Suzuki >> 2002 >> XL-7 Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Engine Controls - Self-Diagnostics - 1.6L) >> Diagnostic Tests >> DTC P1118: Engine Coolant Temperature Sensor No. 2 - High Input >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
  1. If engine system check has been performed, go to next step. If engine system check has not been performed, go to A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS.
  2. Turn ignition off. Disconnect ECT sensor No. 2 2-pin harness connector. ECT sensor is located in thermostat housing. See Figure . Turn ignition on. Measure voltage between ground and ECT sensor No. 1 (Light Green wire). Voltage should be 4-5 volts. If voltage is not as specified, go to next step. If voltage is as specified, leave harness connector disconnected and go to step  4 .
  3. Repair short to ground in Light Green wire between ECM and ECT sensor No. 2. After repair, repeat DTC CONFIRMATION PROCEDURE  .
  4. Turn ignition off. Disconnect ECM 16-pin harness connector C20. ECM is located under instrument panel, behind glove box. See Figure . Check continuity of Green/Red wire between ECT sensor No. 2 and ECM. See Figure and WIRING DIAGRAMS article. If continuity exists, go to step  6 . If no continuity exists, go to next step.
  5. Repair short to ground in Green/Red wire between ECM and ECT sensor No. 2. After repair, repeat DTC CONFIRMATION PROCEDURE  .
  6. Check ECT sensor No. 2 operation. See appropriate procedure under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING article. If problem is found, replace ECT sensor No. 2. After repair, repeat DTC CONFIRMATION PROCEDURE  . If no problem is found, problem is probably intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If no intermittent problem is found, go to next step.
  7. Substitute a known good ECM, and repeat DTC CONFIRMATION PROCEDURE  . If DTC does not reset, testing is complete.
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