How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the engine immobilizer system.
• *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP 

   GO TO NEXT STEP 

2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

   If the voltage is below 11 V, recharge or replace the battery before proceeding.

   GO TO NEXT STEP 

3. CRANK ENGINE FOR MORE THAN 10 SECONDS 

   GO TO NEXT STEP 

4. CHECK FOR DTCS* 
   1. Check for DTCs and note any codes that are output (see DTC CHECK/CLEAR  ).
   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.

      Result: 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC output does not reoccur	A
      SFI system DTC output reoccurs	B
      Engine immobilizer system DTC output reoccurs	C

   B: GO TO  SFI SYSTEM  (1GR-FE) OR  SFI SYSTEM  (2TR-FE)  

   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
      
      

      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 

   Result: 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Fault is not listed in problem symptoms table	A
   Fault is listed in problem symptoms table	B

   B: GO TO STEP   8 

   A: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. DATA LIST/ACTIVE TEST (See DTC CHECK/CLEAR  )
      1. Inspection with intelligent tester (DATA LIST)
      2. Inspection with intelligent tester (ACTIVE TEST)
   2. See TERMINALS OF ECU 
8. ADJUST, REPAIR OR REPLACE 

   GO TO NEXT STEP 

9. CONFIRMATION TEST 

   END