Inspection Procedure

CHECK COMBINATION METER ASSY
(REFERENCE) INSPECTION USING OSCILLOSCOPE
1. Check the input signal waveform.
  1. Remove the combination meter assy.
  2. Connect the oscilloscope to the terminals C11-5 and C9-9 of combination meter connector.
  3. Start engine.
    
    Fig 1: Checking Combination Meter Assy Terminals C11-5 And C9-9
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Check the signal waveform.
    
    Fig 2: Item Contents Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 3: Identifying Signal Waveform
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 4: Signal Waveform Condition
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. B: CHECK AND REPLACE COMBINATION METER ASSY
2. A: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (BETWEEN ECM AND COMBINATION METER)
1. Remove the combination meter.
2. Check the continuity between terminals 14 (THWO) of engine ECU and C11-5 of combination meter connector (See TERMINALS OF ECU .
Standard: There is continuity.
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
  CHECK AND REPLACE ECM