How To Proceed With Troubleshooting

HINT:

Use this procedure to troubleshoot the engine immobilizer system.

The hand-held tester should be used in steps  4,  5 and  7.

1. VEHICLE BROUGHT TO WORKSHOP 
   1. Go To Next Step. 
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
   1. Go To Next Step. 
3. CRANK ENGINE FOR MORE THAN 10 SECONDS 
   1. Go To Next Step. 
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.
   1. B: Go to SFI SYSTEM (See  SFI SYSTEM (2AZ-FE)  ) (See  SFI SYSTEM (3MZ-FE)  ) 
   2. C: Go to step   8 
   3. A: Go to Next Step. 
5. READ VALUE OF HAND-HELD TESTER 
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON and push the hand-held tester main switch ON.
   3. On the hand-held tester, enter the following menus: DIAGNOSIS/ENHANCED OBD II/DATA LIST/IMMOBILIZER/KEY SW. Read the values.

      Transponder key ECU assy: 

      TRANSPONDER KEY ECU ASSY
      
      

      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. 

   1. NG: Go to DTC B2780 (See  DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING SWITCH MALFUNCTION  ) 
   2. OK: Go to Next Step. 
6. PROBLEM SYMPTOMS TABLE (See  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.
   1. B: Go to step   8 
   2. A: Go to Next Step. 
7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. DATA LIST/ACTIVE TEST (see DATA LIST/ACTIVE TEST )
      1. Inspection with the hand-held tester (DATA LIST)
      2. Inspection with the hand-held tester (ACTIVE TEST)
   2. Terminals of ECU (see TERMINALS OF ECU )
   1. Go To Next Step. 
8. ADJUST, REPAIR OR REPLACE 
   1. Go To Next Step. 
9. CONFIRMATION TEST 
   1. END