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HOMESERVICE MANUALSTOYOTA2007HIGHLANDER HYBRID, FWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMULTIPLEX COMMUNICATION (HYBRID)MULTIPLEX COMMUNICATION SYSTEMHOW TO PROCEED WITH TROUBLESHOOTING
2007 Toyota Highlander Hybrid, FWD

How To Proceed With Troubleshooting

2007 Toyota Highlander Hybrid, FWDSECTION How To Proceed With Troubleshooting

HINT:

  • Use this procedure to troubleshoot the multiplex communication system.
  • The intelligent tester should be used in step  2.
  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CHECK FOR DTC 
    1. Check for DTCs and note any codes that are output.
    2. Delete the DTC.
    3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.

      Result 

      RESULT REFERENCE

      Result Proceed to
      DTC does not reoccur A
      DTC reoccurs B

    B: Go to step  4

    A: Go to Next Step 

  3. OVERALL ANALYSIS AND TROUBLESHOOTING 
    1. TERMINALS OF ECU 
  4. ADJUST, REPAIR OR REPLACE 
  5. CONFIRMATION TEST 

    NEXT: END 

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.