DESCRIPTION
The steering lock actuator assembly activates the steering lock motor and moves the lock bar into the steering column to lock the steering.
When the steering lock is operating, the steering may not lock when the lock bar is not aligned with the lock hole of the steering column. In this case, the steering can be locked by turning the steering wheel a little, as is done for a vehicle with a mechanical key, to change the position of the lock hole.
Problem Symptom | Data List Item | Active Test Item |
---|---|---|
Steering Lock does not Lock |
Entry&Start
Main Body
Power Source Control |
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
When using the GTS with the power switch off, connect the GTS to the vehicle 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 the 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 power switch on (ACC) or on (IG).
To lock the steering, turn the power switch off with the shift lever in P, and then open a door.
Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.
The steering lock system uses LIN communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting.
When replacing the steering lock ECU (steering lock actuator assembly), certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), registration must be performed (refer to Service Bulletin).
After performing repairs, confirm that the problem does not recur.
Inspect the fuses for circuits related to this system before performing the following procedure.
When disconnecting the cable from the negative (-) auxiliary battery terminal, some systems need to be initialized after the cable is reconnected.
PROCEDURE
READ VALUE USING GTS (LOCK REQUEST RECEIVE)
Use the Data List to check if the steering lock command is functioning properly.
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) sent to ID code box (immobiliser code ECU) Tech Tips
|
OK or NG | OK: Lock request received within 10 seconds of opening any door with power 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. |
Tester Display |
---|
Lock Request Receive |
OK |
---|
The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the power switch from on (IG) to on (ACC) or off and opening a door with the shift lever in P, and OK is displayed on the GTS screen. |
Result | |||
---|---|---|---|
|
NG |
READ VALUE USING GTS (DOOR COURTESY SW) Click here |
OK |
READ VALUE USING GTS (S CODE CHECK)
Use the Data List to check if S code certification is functioning properly.
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 (immobiliser code ECU) | OK or NG | OK: Verification result normal NG: Verification result abnormal |
When a malfunction is present:
|
Tester Display |
---|
S Code Check |
OK |
---|
OK is displayed on the GTS. |
Tech Tips
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 is replaced, but is not registered.
An ECU is replaced with an ECU which has a code already stored in it.
Result | |||
---|---|---|---|
|
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here |
OK |
READ VALUE USING GTS (L CODE CHECK)
Use the Data List to check if L code certification is functioning properly.
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 assembly) | OK or NG | OK: Verification result normal NG: Verification result abnormal |
When a malfunction is present:
|
Tester Display |
---|
L Code Check |
OK |
---|
OK is displayed on the GTS. |
Tech Tips
Reasons for verification failure:
The steering lock ECU (steering lock actuator assembly) or ID code box (immobiliser 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.
Result | |||
---|---|---|---|
|
NG |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here |
OK |
CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)
Disconnect the O27 steering lock ECU (steering lock actuator assembly) connector.
*a | Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator Assembly)) |
Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Note
If the result is not as specified, check for looseness in the ground cable connection.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)
Reconnect the O27 steering lock ECU (steering lock actuator assembly) connector.
*a | Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) |
*b | Steering Lock Motor not Operating |
*c | Steering Lock Motor Operating |
Check the signal waveform according to the condition(s) in the table below.
Standard Frequency | ||||||||
---|---|---|---|---|---|---|---|---|
|
Tech Tips
When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
In order to take measurements when the lock motor is operating, perform either of the following operations:
To unlock the steering, carry the key and turn the power switch on (ACC) or on (IG).
To lock the steering, turn the power switch off with the shift lever in P, and then open a door.
Result | |||
---|---|---|---|
|
OK |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here |
NG |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the O27 steering lock ECU (steering lock actuator assembly) connector.
Disconnect the O6 certification ECU (smart key ECU assembly) connector.
Check for deformation and corrosion of the connector case and terminals.
OK |
---|
There is no deformation or corrosion of the connector case or terminals. |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)
Reconnect the O27 steering lock ECU (steering lock actuator assembly) connector.
Reconnect the O6 certification ECU (smart key ECU assembly) connector.
*a | Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)
Replace the steering lock ECU (steering lock actuator assembly) with a new one.
Perform registration (refer to Service Bulletin).
Use the Data List to check if L code certification is functioning properly.
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 assembly) | OK or NG | OK: Verification result normal NG: Verification result abnormal |
When a malfunction is present:
|
Tester Display |
---|
L Code Check |
OK |
---|
OK is displayed on the GTS. |
Result | |||
---|---|---|---|
|
OK |
END |
NG |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
Replace the certification ECU (smart key ECU assembly) with a new one.
Perform registration (refer to Service Bulletin).
Use the Data List to check if S code certification is functioning properly.
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 (immobiliser code ECU) | OK or NG | OK: Verification result normal NG: Verification result abnormal |
When a malfunction is present:
|
Tester Display |
---|
S Code Check |
OK |
---|
OK is displayed on the GTS. |
Result | |||
---|---|---|---|
|
OK |
END |
NG |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
READ VALUE USING GTS (DOOR COURTESY SW)
Using the GTS, check the following main body ECU (multiplex network body ECU) Data List item by opening and closing the driver door to confirm the state of the front door courtesy light switch assembly.
Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
FR Door Courtesy SW | Front door courtesy light switch assembly RH (for RHD) | ON or OFF | ON: Front door RH open OFF: Front door RH 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 related part. |
FL Door Courtesy SW | Front door courtesy light switch assembly LH (for LHD) | 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 related part. |
Tester Display |
---|
FR Door Courtesy SW |
FL Door Courtesy SW |
OK |
---|
The Data List item changes in accordance with the opening and closing of the driver door. |
Result | |||
---|---|---|---|
|
NG |
GO TO LIGHTING SYSTEM (FRONT DOOR COURTESY SWITCH CIRCUIT) Click here |
OK |
READ VALUE USING GTS (SHIFT P SIGNAL)
Move the shift lever to P.
Read the Data List according to the display on the GTS.
Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
Shift P Signal | Shift position (P) signal | ON or OFF | ON: Shift lever in P OFF: Shift lever not in P |
|
Tester Display |
---|
Shift P Signal |
OK |
---|
ON is displayed on the GTS. |
Result | |||
---|---|---|---|
|
NG |
GO TO ENTRY AND START SYSTEM (for Start Function) (PROBLEM SYMPTOMS TABLE) Click here |
OK |
READ VALUE USING GTS (STEERING LOCK)
Check that the steering is unlocked.
Read the Data List according to the display on the GTS.
Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
Steering Lock | State of whether steering lock ECU (steering lock actuator assembly) determined steering is locked | Set or Unset | Set: Steering locked Unset: Steering unlocked |
If this item displays "Unset", the steering is not locked. |
Tester Display |
---|
Steering Lock |
OK |
---|
Set is displayed on the GTS. |
Result | |||
---|---|---|---|
|
NG |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here |
OK |
READ VALUE USING GTS (LOCK REQUEST RECEIVE)
Replace the certification ECU (smart key ECU assembly) with a new one.
Perform registration (refer to Service Bulletin).
Turn the power switch on (IG).
Use the Data List to check if the steering lock command is functioning properly.
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) sent to ID code box (immobiliser code ECU) Tech Tips
|
OK or NG | OK: Lock request received within 10 seconds of opening any door with power 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. |
Tester Display |
---|
Lock Request Receive |
OK |
---|
The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the power switch from on (IG) to on (ACC) or off and opening a door with the shift lever in P, and OK is displayed on the GTS screen. |
Result | |||
---|---|---|---|
|
OK |
END |
NG |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |