Unable to Unlock Steering Wheel (Engine cannot Start) [08/2015 - 08/2019]: Procedure
- CHECK ENGINE SWITCH (SWITCH CONDITION)
- Check the power source mode change.
- When the key is inside the vehicle and the shift lever is in P, check that pressing the engine switch causes the power source mode to change as follows:
OK
off → on (ACC) → on (IG) → off
- When the key is inside the vehicle and the shift lever is in P, check that pressing the engine switch causes the power source mode to change as follows:
Result:
NG
GO TO SMART KEY SYSTEM (FOR START FUNCTION) (PROBLEM SYMPTOMS TABLE)
(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )
Result:
OK
See step 2
- Check the power source mode change.
- READ VALUE USING TECHSTREAM (UNLOCK REQUEST RECEIVE)
- Use the Data List to check if the steering lock command is functioning properly.SMART KEY
Tester Display Measurement Item/Range Normal Condition Diagnostic Note Unlock Request Receive Steering lock unlock command reception status/NG or OK NG: Unlock request not received
OK: Unlock request received- OK
The certification ECU receives an unlock request signal within 10 seconds of starting the engine, and OK is displayed on the Techstream screen.
Result:
NG
See step 5
Result:
OK
See step 3
- Use the Data List to check if the steering lock command is functioning properly.
- CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY AND BODY GROUND)
- Disconnect the F68 steering lock ECU connector.
- Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F68-1 (GND) - Body ground Always Below 1 Ω Standard Voltage
Tester Connection Condition Specified Condition F68-7 (B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Steering Lock ECU)
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- Disconnect the F68 steering lock ECU connector.
- INSPECT STEERING LOCK ECU (IGE VOLTAGE)
- Move the shift lever to P.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition F68-3 (IGE) - F68-1 (GND) Steering lock motor operating immediately after turning engine switch from off to on (IG) Below 1 V F68-3 (IGE) - F68-1 (GND) Steering lock motor not operating 11 to 14 V TEXT IN ILLUSTRATION*a Component with harness connected
(Steering Lock ECU)
Result:
OK
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
(Refer to DISASSEMBLY [08/2015 - 08/2022] )
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Move the shift lever to P.
- READ VALUE USING TECHSTREAM (S CODE CHECK)
- Use the Data List to check if the S code certification is functioning properly.SMART KEY
Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/NG or OK OK: S code certification result normal
NG: S code certification result abnormal- OK
OK is displayed on the Techstream.
Result:
NG
See step 9
Result:
OK
See step 6
- Use the Data List to check if the S code certification is functioning properly.
- READ VALUE USING TECHSTREAM (L CODE CHECK)
- Use the Data List to check if the L code certification is functioning properly.SMART KEY
Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/NG or OK OK: L code certification result normal
NG: L code certification result abnormal- OK
OK is displayed on the Techstream.
Result:
NG
See step 11
Result:
OK
See step 7
- Use the Data List to check if the L code certification is functioning properly.
- REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
- Replace the steering lock actuator assembly (steering lock ECU) (Refer to DISASSEMBLY [08/2015 - 08/2022] ).
Result:
NEXT
See step 8
- CHECK STEERING LOCK RELEASE OPERATION
- Turn the engine switch on (IG).
- Operate the steering wheel and check the steering lock condition.
OK
Steering lock is released.
Result:
OK
END (STEERING LOCK ECU IS DEFECTIVE)
Result:
NG
REPLACE CERTIFICATION ECU
(Refer to REMOVAL [08/2015 - 08/2019] )
- REPLACE ID CODE BOX
- Replace the ID code box (Refer to REMOVAL [08/2015 - ] ).
Result:
NEXT
See step 10
- READ VALUE USING TECHSTREAM (S CODE CHECK)
- Use the Data List to check if the S code certification is functioning properly.SMART KEY
Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/NG or OK OK: S code certification result normal
NG: S code certification result abnormal- OK
OK is displayed on the Techstream.
Result:
OK
END (ID CODE BOX IS DEFECTIVE)
Result:
NG
REPLACE CERTIFICATION ECU
(Refer to REMOVAL [08/2015 - 08/2019] )
- Use the Data List to check if the S code certification is functioning properly.
- REPLACE ID CODE BOX
- Replace the ID code box (Refer to REMOVAL [08/2015 - ] ).
Result:
NEXT
See step 12
- READ VALUE USING TECHSTREAM (L CODE CHECK)
- Use the Data List to check if the L code certification is functioning properly.SMART KEY
Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/NG or OK OK: L code certification result normal
NG: L code certification result abnormal- OK
OK is displayed on the Techstream.
Result:
OK
END (ID CODE BOX IS DEFECTIVE)
Result:
NG
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
(Refer to DISASSEMBLY [08/2015 - 08/2022] )
- Use the Data List to check if the L code certification is functioning properly.