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Home >> Lexus >> 2004 >> SC 430 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Combination Meter - Diagnosis (From July, 2002) >> Malfunction In Water Temperature Receiver Gauge >> Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST BY LEXUS HAND-HELD TESTER 
    1. Check engine coolant temperature receiver gauge operation.
    1. Connect LEXUS hand-held tester to DLC3.
    2. Turn the ignition switch ON and push LEXUS hand-held tester main switch ON.
    3. Select the ACTIVE TEST mode on LEXUS hand-held tester.
    4. Check that the probe moves as LEXUS hand-held tester directs in each range.

      OK: The meter operations normally. 

    1. NG: CHECK AND REPLACE COMBINATION METER ASSY 
    2. OK: GO TO STEP   2 . 
  2. READ VALUE OF LEXUS HAND-HELD TESTER 
    1. Check output value of speedometer.
    1. Connect LEXUS hand-held tester to DLC3.
    2. Turn the ignition switch ON and push LEXUS hand-held tester main switch ON.
    3. Select the DATA LIST mode on LEXUS hand-held tester.
    4. Read the engine coolant temperature value on LEXUS hand-held tester.

      OK: Same as actual engine coolant temperature. 

    1. NG: GO TO ENGINE CONTROL SYSTEM 
    2. OK: GO TO STEP   3 . 
  3. CHECK THAT MALFUNCTION DISAPPEARS A KNOWN GOOD COMBINATION METER IS INSTALLED 
    1. Check that malfunction disappears when a known good combination meter is installed.
      Fig 1: Malfunction Reference Table
      G01450002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. B: CHECK AND REPLACE ECM 
    2. A: CHECK AND REPLACE COMBINATION METER ASSY 
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