How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

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

3. CRANK ENGINE FOR MORE THAN 10 SECONDS 
4. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output (see DTC CHECK/CLEAR  ).
   2. Clear the DTCs (see DTC CHECK/CLEAR  ).
   3. Recheck for DTCs. Try to duplicate the DTC (SFI system and engine immobilizer system) by simulating the symptoms indicated by the DTC.

      Result 

      DTC RESULT CHART
      
      

      Result	Proceed to
      DTC is not output	A
      SFI system (for 2UZ-FE) DTC is output	B
      SFI system (for 3UR-FE) DTC is output	C
      Engine immobilizer system DTC is output	D

   B: Go to SFI SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   C: Go to SFI SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   D:  Go to DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to Next Step 

5. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULTS
   
   

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

   B:  Go to step  7

   A: Go to Next Step 

6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. See DATA LIST / ACTIVE TEST 
   2. See TERMINALS OF ECU 
7. ADJUST, REPAIR OR REPLACE 
8. CONFIRMATION TEST 

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