Unable to Lock Steering Wheel: Procedure

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/Unlock Receive	Steering lock command reception record/ Yes or No	Yes: Steering lock/unlock signal received No: Steering lock/unlock signal not received	-

   OK

   The certification ECU (smart key ECU assembly) receives an unlock request signal within 10 seconds of starting the engine, and "Yes" is displayed on the Techstream screen.

NG → See step   4 

OK: Go to next step 

1. Move the shift lever to P.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F37-3 (IGE) - F37-1 (GND)	Steering lock motor operating immediately after turning the engine switch from off to on (IG)	Below 1 V
   F37-3 (IGE) - F37-1 (GND)	Steering lock motor not operating	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Steering Lock ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the F8 power management control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1

   Rear view of wire harness connector (to Power Management Control ECU)

   *2

   Front view of wire harness connector (to Steering Lock ECU)

2. Disconnect the F37 steering lock ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F37-3 (IGE) - F8-8 (SLR+)	Always	Below 1 Ω
   F37-3 (IGE) or F8-8 (SLR+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   13 

1. Use the Data List to check if the front door courtesy switch LH is functioning properly.

   Main Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FL Door Courtesy SW	Front door courtesy switch LH/ ON or OFF	ON: Front door LH open OFF: Front door LH closed	-

   OK

   Front door courtesy switch LH is functioning properly.

NG → See step   14 

OK: Go to next step 

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

   Smart Access

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code certification result/ NG or OK	NG: S code certification result abnormal OK: S code certification result normal	-

   OK

   "OK" is displayed on the Techstream.

NG → See step   9 

OK: Go to next step 

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

   Smart Access

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code certification result/ NG or OK	NG: L code certification result abnormal OK: L code certification result normal	-

   OK

   "OK" is displayed on the Techstream.

NG → See step   11 

OK: Go to next step 

1. Replace the steering lock ECU (steering lock actuator assembly). Refer to DISASSEMBLY [03/2012 - ] .

NEXT: Go to next step 

1. Turn the engine switch on (IG).
2. Operate the steering wheel and check the steering lock condition.

   OK

   Steering lock is released.

NG → See step   15 

OK → END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE) 

1. Replace the ID code box (immobiliser code ECU). Refer to REMOVAL [03/2012 - ] .

NEXT: Go to next step 

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

   Smart Access

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code certification result/ NG or OK	NG: S code certification result abnormal OK: S code certification result normal	-

   OK

   "OK" is displayed on the Techstream.

NG → See step   15 

OK → END (ID CODE BOX WAS DEFECTIVE) 

1. Replace the ID code box (immobiliser code ECU). Refer to REMOVAL [03/2012 - ] .

NEXT: Go to next step 

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

   Smart Access

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code certification result/ NG or OK	NG: L code certification result abnormal OK: L code certification result normal	-

   OK

   "OK" is displayed on the Techstream.

NG → See step   13 

OK → END (ID CODE BOX WAS DEFECTIVE)