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How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2007 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use this procedure to troubleshoot the engine immobilizer system.

The intelligent tester should be used in steps  4,  5 and  7.

  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 
  3. CRANK ENGINE FOR MORE THAN 10 SECONDS 
  4. CHECK FOR DTCS 
    1. Check for DTCs and note any codes that are output.
    2. Delete the DTC.
    3. Recheck for DTCs. Based on the DTC output in (a), try to force output of the same SFI system DTC or engine immobilizer system DTC by simulating the original activity indicated by the DTC.
      1. If the DTC does not reoccur, proceed to A.
      2. If the SFI system DTC reoccurs, proceed to B.
      3. If the engine immobilizer system DTC reoccurs, proceed to C.

    B:  Go to SFI SYSTEM

    C: Go to step  8

    A: Go to next step. 

  5. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch ON and push the intelligent tester main switch ON.
    3. On the intelligent tester, enter the following menus: DIAGNOSIS/ENHANCED OBD II/DATA LIST/ immobilizer/KEY SW. Read the values.

      Transponder key ECU assembly 

      TRANSPONDER KEY ECU REFERENCE CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      KEY SW Unlock warning switch signal/ON or OFF OFF: No key is in ignition key cylinder
      ON: Key is in ignition key cylinder      		 -

      OK: "ON" (key is in ignition key cylinder) appears on the screen. 

    NG: Go to DTC B2780 

    OK: Go to next step. 

  6. PROBLEM SYMPTOMS TABLE 
    1. If the fault is not listed on the problem symptoms table, proceed to A.
    2. If the fault is listed on the problem symptoms table, proceed to B.

    B: Go to step  8

    A: Go to next step. 

  7. OVERALL ANALYSIS AND TROUBLESHOOTING 
    1. DATA LIST / ACTIVE TEST 
      1. Inspection with the intelligent tester (DATA LIST)
      2. Inspection with the intelligent tester (ACTIVE TEST)
    2. TERMINALS OF ECU 
  8. ADJUST, REPAIR OR REPLACE 
  9. CONFIRMATION TEST 

    NEXT: END 

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