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 
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See  CUSTOMER PROBLEM ANALYSIS 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 operation 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 (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

   C: Go to step 8 

   A: Go to next step 

5. READ DATA LIST USING HAND-HELD TESTER 
   1. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the DLC3.
   2. Turn the ignition switch ON and push the hand-held tester main switch ON.
   3. Read the DATA LIST.

   Steering lock ECU: 

   DATA LIST - STEERING LOCK ECU
   
   

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

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

   NG: Go to DTC B2780 (See  DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING SWITCH MALFUNCTION   ) 

   OK: Go to next step 

6. 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.

   B: Go to step 8 

   A: Go to next step 

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

   END