Unable to Lock Steering Wheel: Procedure

1. Using the Techstream, confirm the output of DTCs for all systems.

   OK

   No DTCs are output.

   NOTE:

   • When using the Techstream with the vehicle engine switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
   • Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2012 - ] .

NG → REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

OK: Go to next step 

1. Use the Data List to check if the steering lock command is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock Request Receive	Reception state of steering lock request signal by certification ECU (smart key ECU assembly) and sent to ID code box (immobilizer code ECU) / OK or NG HINT:  The reception state is maintained for 10 seconds. When 10 seconds or more have elapsed after receiving the signal, the item changes to "NG".	OK: Within 10 seconds of opening any door with engine switch off and shift lever in P NG: Except above	If this item does not change to "OK" even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

   OK

   The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the engine switch from on (IG) to off and opening a door with the shift lever in P, and OK is displayed on the Techstream screen.

NG → See step   5 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   12 

1. Using the Techstream, check the following main body ECU Data List item by opening and closing the driver door to confirm the state of the front door courtesy light switch assembly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FL Door Courtesy SW	Front door courtesy light switch assembly LH / ON or OFF	ON: Front door LH open OFF: Front door LH closed	If this item does not change according to the actual state of the driver door, there is a malfunction in the door courtesy light switch or a related part.

   OK

   The Data List item changes in accordance with the opening and closing of the driver door.

NG → See step   11 

OK: Go to next step 

1. Use the Data List to check if S code certification is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) / OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK is displayed on the Techstream.

   HINT: 

   Reasons for verification failure:

   • The certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning.
   • There is a problem with the communication between ECUs.
   • An ECU is replaced, but is not registered.
   • An ECU is replaced with an ECU which has a code already stored in it.

NG → See step   9 

OK: Go to next step 

1. Use the Data List to check if L code certification is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between ID code box (immobilizer code ECU) and steering lock ECU / OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box (immobilizer code ECU) or steering lock ECU is not registered or the ID code box (immobilizer code ECU) or steering lock ECU is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK is displayed on the Techstream.

   HINT: 

   Reasons for verification failure:

   • The steering lock ECU or ID code box (immobilizer code ECU) is malfunctioning.
   • There is a problem with the communication between ECUs.
   • An ECU is replaced, but is not registered.
   • An ECU is replaced with an ECU which has a code already stored in it.

NG → See step   10 

OK: Go to next step 

1. Replace the steering lock ECU (steering lock actuator assembly) with a new one. Refer to DISASSEMBLY [06/2012 - ] .
2. Perform registration procedures. Refer to REGISTRATION [06/2012 - ] .
3. Turn the engine switch on (IG).
4. Turn the steering wheel and check the steering lock condition.

   OK

   Steering is unlocked.

NG → See step   13 

OK → END 

1. Replace the certification ECU (smart key ECU assembly) with a new one. Refer to REMOVAL [06/2012 - ] .
2. Perform registration procedures. Refer to REGISTRATION [06/2012 - ] .
3. Use the Data List to check if S code certification is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) / OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK is displayed on the Techstream.

NG → See step   14 

OK → END 

1. Replace the steering lock ECU (steering lock actuator assembly) with a new one. Refer to DISASSEMBLY [06/2012 - ] .
2. Perform registration procedures. Refer to REGISTRATION [06/2012 - ] .
3. Use the Data List to check if L code certification is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between ID code box (immobilizer code ECU) and steering lock ECU / OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box (immobilizer code ECU) or steering lock ECU is not registered or the ID code box (immobilizer code ECU) or steering lock ECU is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK is displayed on the Techstream.

NG → See step   14 

OK → END