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How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Step 3, 4, 9:

Diagnostic steps permitting the use of the hand-held tester.

  1. VEHICLE BROUGHT TO WORK SHOP 
    1. Go To Next Step. 
  2. CUSTOMER PROBLEM ANALYSIS, see  CUSTOMER PROBLEM ANALYSIS CHECK  . 
    1. Go To Next Step. 
  3. CHECK BODY MULTIPLEX COMMUNICATION SYSTEM, see  HOW TO PROCEED WITH TROUBLESHOOTING  . 
    1. Check that the DTCs output.

    HINT:

    The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

    1. DTC OUTPUTS (PROCEED TO "BODY MULTIPLEX COMMUNICATION SYSTEM") 
    2. DTC DOES NOT OUTPUT (GO TO STEP 4) 
  4. THE DTCs CHECK, see  PRE-CHECK  . 
    1. MALFUNCTION CODE (GO TO STEP 5) 
    2. NORMAL CODE (GO TO STEP   6 ) 
  5. DTC CHART, see  DIAGNOSTIC TROUBLE CODE CHART  . 
    1. Go To Next Step. 
    2. GO TO STEP   9 
  6. PROBLEM SYMPTOM CONFIRMATION 
    1. SYMPTOM DOES NOT OCCUR (GO TO STEP 7) 
    2. SYMPTOM OCCURS (GO TO STEP   8 ) 
  7. SYMPTOM SIMULATION, see  HOW TO PROCEED WITH TROUBLESHOOTING  . 
    1. GO TO STEP   9 
  8. PROBLEM SYMPTOMS TABLE  
    1. Go To Next Step. 
  9. CIRCUIT INSPECTION, see  DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT, DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH   - 05-1745)  .
    1. Go To Next Step. 
  10. TERMINAL OF ECU, see  TERMINALS OF ECU  . 
    1. Go To Next Step. 
  11. IDENTIFYING PROBLEM 
    1. Go To Next Step. 
  12. REPAIR OR REPLACE 
    1. Go To Next Step. 
  13. CONFIRMATION TEST 
    1. Go To Next Step. 
    2. END 
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