RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0586354 SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series)) J

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series))  Unable to Unlock Steering Wheel (Engine cannot Start)  


DESCRIPTION

The steering lock ECU (steering lock actuator or upper bracket assembly) activates the steering lock motor and moves the lock bar into the steering column to lock the steering.

The steering may not unlock when the lock bar gets stuck in the lock hole of the steering column. In this case, if the engine switch is turned on (IG) while shaking the steering wheel, as is done for a vehicle with a mechanical key, the lock bar will be unlocked. If the ID code box (immobiliser code ECU) or ECM is replaced, the system needs to be initialized. Otherwise, the steering cannot be unlocked and the engine cannot be started.

Related Data List and Active Test Items
Problem Symptom Data List and Active Test
Unable to unlock steering wheel (Engine cannot start)
Entry&Start
·

Unlock Request Receive

·

S Code Check

·

L Code Check

·

Steering Unlock



WIRING DIAGRAM

B503740E03
3.531,0.552 4.375,0.792 0.844,0.24 10 false from Battery 2.365,0.719 3.281,0.938 0.917,0.219 10 false STRG LOCK 2.156,0.458 2.583,0.667 0.427,0.208 10 false 7 1.948,0.563 2.375,0.771 0.427,0.208 10 false B 1.813,3.156 2.24,3.365 0.427,0.208 10 false IGE 1.698,3.5 2.125,3.708 0.427,0.208 10 false SLP1 1.75,3.823 2.177,4.031 0.427,0.208 10 false GND 0.229,4.281 0.656,4.49 0.427,0.208 10 false I59 0.219,4.438 2.885,4.823 2.667,0.385 10 false Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly) 0.604,5.365 2.365,5.656 1.76,0.292 10 false : LIN Communication Line 5.344,4.271 5.771,4.479 0.427,0.208 10 false I1 5.344,4.438 6.875,4.813 1.531,0.375 10 false Certification ECU (Smart Key ECU Assembly) 5.771,3.813 6.198,4.021 0.427,0.208 10 false E 5.76,3.49 6.188,3.698 0.427,0.208 10 false SLP 5.76,3.156 6.188,3.365 0.427,0.208 10 false SLR+ 5.51,3.073 5.938,3.281 0.427,0.208 10 false 25 5.51,3.396 5.938,3.604 0.427,0.208 10 false 12 5.5,3.708 5.927,3.917 0.427,0.208 10 false 18 2.156,3.708 2.583,3.917 0.427,0.208 10 false 1 2.156,3.396 2.583,3.604 0.427,0.208 10 false 4 2.146,3.073 2.573,3.281 0.427,0.208 10 false 3 5.313,1.781 6.896,2.146 1.583,0.365 10 false ID Code Box (Immobiliser Code ECU)

CAUTION / NOTICE / HINT

NOTICE:
·

When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

Perform either of the following operations to lock/unlock the steering:

-

To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG).

-

To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.


·

The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (NR Series))>HOW TO PROCEED WITH TROUBLESHOOTING

·

After performing repairs, confirm that the problem does not recur.

·

Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.

·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

Before replacing the steering lock ECU (steering lock actuator or upper bracket assembly), certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), refer to Service Bulletin.

·

When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

If the steering lock ECU (steering lock actuator or upper bracket assembly) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the engine. This function prevents the engine from starting while the steering is locked. If the steering is locked for any reason, open and close a door with the engine switch off, and then unlock the steering by pressing the engine switch.



PROCEDURE

1.CHECK ENGINE SWITCH (SWITCH CONDITION)
a.

Check the power source mode change.

i.

When the key is inside the vehicle and the shift lever is in P, check that pressing the engine switch with the brake pedal released causes the power source mode to change as follows:

OK:

Off → On (ACC) → On (IG) → Off




Result:
Proceed to
OK
NG



OK

2.CHECK INDICATOR

NG

GO TO OTHER PROBLEM

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (NR Series))>PROBLEM SYMPTOMS TABLE


2.CHECK INDICATOR
a.

With the engine switch on (IG), check that Steering Lock active is displayed on the multi-information display in the combination meter assembly.


Result:
Result Proceed to
Steering Lock active is displayed A
Steering Lock active is not displayed B



A

3.CHECK STEERING UNLOCK

B

4.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)
3.CHECK STEERING UNLOCK
a.

Turn the steering wheel left and right, and then press the engine switch.


b.

Check that the steering is unlocked.


Result:
Result Proceed to
The steering is unlocked A
The steering is not unlocked B



A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

4.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)
4.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Entry&Start / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Unlock Request Receive Status of steering unlock command from certification ECU (smart key ECU assembly) OK or NG OK: Certification ECU (smart key ECU assembly) sends steering unlock command (within 10 seconds of engine switch turned on (ACC) or on (IG), or of engine start operation performed)
NG: Certification ECU (smart key ECU assembly) does not send steering unlock command (engine switch not turned on (ACC) or on (IG), and engine start operation not performed)
·

The engine cannot be started when an unlock request signal cannot be received.

·

If OK is not displayed even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.


Body Electrical > Entry&Start > Data List
Tester Display
Unlock Request Receive
50003 125 67
OK:

Within 10 seconds of turning the engine switch on (ACC) or on (IG) or starting the engine, the Data List item changes to "OK".



Result:
Proceed to
OK
NG



OK

5.READ VALUE USING GTS (S CODE CHECK)

NG

12.CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
5.READ VALUE USING GTS (S CODE CHECK)
a.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
S Code Check S code verification result OK or NG OK: Verification result normal
NG: Verification result abnormal 		When NG is displayed:
·

The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered, or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.

·

The steering cannot be locked.

·

The steering cannot be unlocked (the engine cannot be started).


Body Electrical > Entry&Start > Data List
Tester Display
S Code Check
50003 125 65
OK:

OK is displayed on the GTS.


HINT:

Reasons for verification failure:

·

The certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.

·

There is a problem with the communication between ECUs.

·

An ECU was replaced, but not registered.

·

An ECU was replaced with an ECU which has already been registered to another vehicle.




Result:
Proceed to
OK
NG



OK

6.READ VALUE USING GTS (L CODE CHECK)

NG

11.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
6.READ VALUE USING GTS (L CODE CHECK)
a.

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

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
L Code Check Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) OK or NG OK: Verification result normal
NG: Verification result abnormal 		When NG is displayed:
·

The ID code for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) is not registered, or the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) is malfunctioning.

·

The steering cannot be locked.

·

The steering cannot be unlocked (the engine cannot be started).


Body Electrical > Entry&Start > Data List
Tester Display
L Code Check
50003 125 66
OK:

OK is displayed on the GTS.


HINT:

Reasons for verification failure:

·

The steering lock ECU (steering lock actuator or upper bracket assembly) or certification ECU (smart key ECU assembly) is malfunctioning.

·

There is a problem with the communication between ECUs.

·

An ECU was replaced, but not registered.

·

An ECU was replaced with an ECU which has already been registered to another vehicle.




Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (POWER SOURCE AND GROUND)

NG

10.CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
7.CHECK HARNESS AND CONNECTOR (POWER SOURCE AND GROUND)
a.
C350527C99
1.5,0.969 1.917,1.229 0.417,0.26 0.917,2.917 1.167,2.917 1.167,2.917 1.167,1.948 true 2.5,2.917 2.25,2.917 2.25,2.917 2.25,1.948 true 0.177,0.208 0.49,0.365 0.313,0.156 10 false *a 0.781,2.823 1.094,2.99 0.313,0.167 10 false B 2.542,2.823 2.927,2.99 0.385,0.167 10 false GND 1.604,1.01 1.917,1.167 0.313,0.156 10 false I59
*a Component with harness connected
(Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))


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

Standard Resistance:
Tester Connection Condition Specified Condition
I59-1 (GND) - Body ground Always Below 1 Ω


NOTICE:

If the result is not as specified, check for looseness in the ground cable connection.



b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
I59-7 (B) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

8.REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
a.

Replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one and perform registration.

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY


Result:
Proceed to
NEXT



NEXT

9.CHECK STEERING UNLOCK
9.CHECK STEERING UNLOCK
a.

Turn the steering wheel left and right, and then press the engine switch.


b.

Check that the steering is unlocked.


Result:
Result Proceed to
The steering is unlocked A
The steering is not unlocked B



A

END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

B

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

10.CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
a.

Replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one and perform registration.

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY

HINT:

Refer to Service Bulletin.



b.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
L Code Check Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) OK or NG OK: Verification result normal
NG: Verification result abnormal 		When NG is displayed:
·

The ID code for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) is not registered, or the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) is malfunctioning.

·

The steering cannot be locked.

·

The steering cannot be unlocked (the engine cannot be started).


Body Electrical > Entry&Start > Data List
Tester Display
L Code Check
50003 125 66
OK:

OK is displayed on the GTS.



Result:
Proceed to
OK
NG



OK

END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

11.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.

Replace the certification ECU (smart key ECU assembly) with a new one and perform registration.

HINT:

Refer to Service Bulletin.



b.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
S Code Check S code verification result OK or NG OK: Verification result normal
NG: Verification result abnormal 		When NG is displayed:
·

The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered, or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.

·

The steering cannot be locked.

·

The steering cannot be unlocked (the engine cannot be started).


Body Electrical > Entry&Start > Data List
Tester Display
S Code Check
50003 125 65
OK:

OK is displayed on the GTS.



Result:
Proceed to
OK
NG



OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

12.CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
a.
C400234C02
1.51,0.917 1.885,1.167 0.375,0.25 2.302,2.979 1.719,2.979 1.719,2.979 1.719,1.979 true 2.344,2.896 2.802,3.094 0.458,0.198 10 false SLP1 1.594,0.958 2.052,1.156 0.458,0.198 10 false I59 0.229,0.229 0.542,0.427 0.313,0.198 10 false *a
*a Component with harness connected
(Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))


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

Standard Voltage:
Tester Connection Condition Specified Condition
I59-4 (SLP1) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

13.READ VALUE USING GTS (STEERING UNLOCK)

NG

15.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
13.READ VALUE USING GTS (STEERING UNLOCK)
a.

Turn the engine switch off.


b.

Check that the steering is locked.


c.

Connect the GTS to the DLC3.


d.

Turn the GTS on.

HINT:

When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.



e.

Enter the following menus: Body Electrical / Entry&Start / Data List.


f.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Steering Unlock Steering lock ECU (steering lock actuator or upper bracket assembly) unlock confirmation status Unset or Set Unset: Unlock not confirmed
Set: Unlock confirmed 		When Unset is displayed, the steering is not unlocked (the engine cannot be started).
Body Electrical > Entry&Start > Data List
Tester Display
Steering Unlock
50003 125 48
OK:

Set is displayed on the GTS.



Result:
Proceed to
OK
NG



OK

14.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)

NG

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY


14.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)
a.

Replace the certification ECU (smart key ECU assembly) with a new one and perform registration.

HINT:

Refer to Service Bulletin.



b.

Turn the engine switch on (IG).


c.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Unlock Request Receive Status of steering unlock command from certification ECU (smart key ECU assembly) OK or NG OK: Certification ECU (smart key ECU assembly) sends steering unlock command (within 10 seconds of engine switch turned on (ACC) or on (IG), or of engine start operation performed)
NG: Certification ECU (smart key ECU assembly) does not send steering unlock command (engine switch not turned on (ACC) or on (IG), and engine start operation not performed)
·

The engine cannot be started when an unlock request signal cannot be received.

·

If OK is not displayed even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.


Body Electrical > Entry&Start > Data List
Tester Display
Unlock Request Receive
50003 125 67
OK:

Within 10 seconds after the engine switch is turned on (ACC) or on (IG) or the engine is started, the Data List item changes to "OK".



Result:
Proceed to
OK
NG



OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

15.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
a.

Disconnect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector.


b.

Disconnect the I1 certification ECU (smart key ECU assembly) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I59-4 (SLP1) - I1-12 (SLP) Always Below 1 Ω
I59-4 (SLP1) or I1-12 (SLP) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

16.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.READ VALUE USING GTS (UNLOCK REQUEST RECEIVE)
a.

Replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one and perform registration.

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY

HINT:

Refer to Service Bulletin.



b.

Turn the engine switch on (IG).


c.

Use the Data List to check if the steering lock request is functioning properly.

Body Electrical > Entry&Start > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Unlock Request Receive Status of steering unlock command from certification ECU (smart key ECU assembly) OK or NG OK: Certification ECU (smart key ECU assembly) sends steering unlock command (within 10 seconds of engine switch turned on (ACC) or on (IG), or of engine start operation performed)
NG: Certification ECU (smart key ECU assembly) does not send steering unlock command (engine switch not turned on (ACC) or on (IG), and engine start operation not performed)
·

The engine cannot be started when an unlock request signal cannot be received.

·

If OK is not displayed even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.


Body Electrical > Entry&Start > Data List
Tester Display
Unlock Request Receive
50003 125 67
OK:

Within 10 seconds after the engine switch is turned on (ACC) or on (IG) or the engine is started, the Data List item changes to "OK".



Result:
Proceed to
OK
NG



OK

END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)