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Home >> Mitsubishi >> 1994 >> Precis Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> Code 43 - EGR Temperature Sensor Failure >> Harness Inspection
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Harness Inspection

  1. Disconnect EGR temperature sensor harness connector. Turn ignition on. Using DVOM, measure voltage between EGR temperature sensor harness connector terminal No. 1 and vehicle ground. See EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION  table. Voltage should be 4.3-4.7 volts. If voltage is within specification, circuit is okay. If voltage is not within specification, turn ignition off.
  2. Disconnect ECM harness connector. Connect jumper wire between ECM harness connector terminal and vehicle ground. See EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION  table.
  3. Using ohmmeter, check resistance between EGR temperature sensor harness connector terminal No. 1 and vehicle ground. If continuity does not exist, inspect and repair circuit as needed. If continuity exists, substitute ECM with known good unit and retest.
  4. Using ohmmeter, check resistance between EGR temperature sensor connector terminal No. 2 and vehicle ground. See EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION  table. If continuity does not exist, inspect and repair circuit as needed.
    EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION

    Application Wire Color Corresponding ECM Terminal No.
    Power Supply Circuit
    Terminal No. 1 Red (1) 9
    Ground Circuit
    Terminal No. 2 Black (1) 12
    (1)
    22-pin connector.
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