Smart Key
- Steering Lock Request Receive
- S Code Check
- L Code Check
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028KAK |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Steering Lock does not Lock; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 - ] | ||
|
Steering Lock does not Lock |
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.
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.
Related Data List and Active Test Items
|
Problem Symptom |
Data List and Active Test |
|---|---|
|
Steering Lock does not Lock |
Main Body
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When using the GTS with the ignition 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 / Start Key(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 electrical key transmitter sub-assembly and turn the ignition switch to ACC or ON.
- To lock the steering, turn the ignition switch off, and then open a door.
- Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.
-
The smart key 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 key system (for Start Function) after confirming that the communication systems are functioning properly.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
-
Before replacing the steering lock ECU (steering lock actuator or upper bracket assembly) or certification ECU (smart key ECU assembly), refer to Registration.
Click here
- After performing repairs, confirm that the problem does not recur.
- Inspect the fuses for circuits related to this system before performing the following procedure.
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. |
READ VALUE USING GTS (STEERING LOCK REQUEST RECEIVE) |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Steering Lock Request Receive |
Status of steering lock command from certification ECU (smart key ECU assembly) |
OK or NG |
OK: Certification ECU (smart key ECU assembly) sends steering lock command (within 10 seconds of any door opened with ignition switch off) NG: Certification ECU (smart key ECU assembly) does not send steering lock command (no door opened with ignition switch off) |
If OK is not displayed even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning. |
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
Steering Lock Request Receive |
OK:
The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the ignition switch from ON to ACC or off and opening a door, and OK is displayed on the GTS screen.
| NG |
|
|
|
2. |
READ VALUE USING GTS (S CODE CHECK) |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > Data List
|
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 NG is displayed:
|
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
S Code Check |
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.
| NG |
|
|
|
3. |
READ VALUE USING GTS (L CODE CHECK) |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > 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:
|
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
L Code Check |
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 is replaced, but is not registered.
- An ECU is replaced with an ECU which has a code already stored in it.
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE) |
(a) Disconnect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(b) 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.
(c) 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 |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
(a) Connect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector. |
|
(b) Check the signal waveform according to the condition(s) in the table below.
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
I59-3 (IGE) - I59-1 (GND) |
Steering lock motor operating when all conditions met, and then door opened:
|
2 V/DIV., 200 ms./DIV. |
Pulse generation (See waveform) |
| OK |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
|
6. |
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 I167 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 |
|---|---|---|
|
I59-3 (IGE) - I167-24 (SLR+) |
Always |
Below 1 Ω |
|
I59-3 (IGE) or I167-24 (SLR+) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
(a) Connect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector. |
|
(b) Connect the I167 certification ECU (smart key ECU assembly) connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I59-3 (IGE) - Body ground |
Always |
11 to 14 V |
| OK |
|
| NG |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
8. |
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 here
HINT:
For replacement.
Click here
(b) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > 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:
|
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
L Code Check |
OK:
OK is displayed on the GTS.
| OK |
|
END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
|
9. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Replace the certification ECU (smart key ECU assembly) with a new one and perform registration.
Click here
(b) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > Data List
|
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 NG is displayed:
|
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
S Code Check |
OK:
OK is displayed on the GTS.
| OK |
|
END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
|
10. |
READ VALUE USING GTS (DOOR COURTESY SWITCH STATUS) |
(a) Using the GTS, check the following main body ECU (multiplex network body ECU) Data List item by opening and closing each door to confirm the state of each door courtesy light switch.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
FR Door Courtesy Switch Status |
Front door RH courtesy light switch signal |
OFF or ON |
OFF: Front door RH closed ON: Front door RH open |
- |
|
FL Door Courtesy Switch Status |
Front door LH courtesy light switch signal |
OFF or ON |
OFF: Front door LH closed ON: Front door LH open |
- |
|
RR Door Courtesy Switch Status |
Rear door RH courtesy light switch signal |
OFF or ON |
OFF: Rear door RH closed ON: Rear door RH open |
- |
|
RL Door Courtesy Switch Status |
Rear door LH courtesy light switch signal |
OFF or ON |
OFF: Rear door LH closed ON: Rear door LH open |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
FR Door Courtesy Switch Status |
|
FL Door Courtesy Switch Status |
|
RR Door Courtesy Switch Status |
|
RL Door Courtesy Switch Status |
OK:
The Data List item changes in accordance with the opening and closing of each door.
| NG |
|
|
|
11. |
READ VALUE USING GTS (STEERING LOCK DATA FIX) |
(a) Enter the following menus: Body Electrical / Smart Key / Data List.
(b) Check that the steering is unlocked.
(c) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Steering Lock Data Fix |
Steering lock ECU data fix status |
No or Yes |
No: Data not fix Yes: Date fixed |
- |
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
Steering Lock Data Fix |
OK:
Yes is displayed on the GTS.
| NG |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
|
12. |
READ VALUE USING GTS (STEERING LOCK REQUEST RECEIVE) |
(a) Replace the certification ECU (smart key ECU assembly) with a new one and perform registration.
Click here
(b) Read the Data List according to the display on the GTS.
Body Electrical > Smart Key > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Steering Lock Request Receive |
Status of steering lock command from certification ECU (smart key ECU assembly) |
OK or NG |
OK: Certification ECU (smart key ECU assembly) sends steering lock command (within 10 seconds of any door opened with ignition switch off) NG: Certification ECU (smart key ECU assembly) does not send steering lock command (no door opened with ignition switch off) |
If OK is not displayed even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning. |
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
Steering Lock Request Receive |
OK:
Within 10 seconds after any of the doors is opened with ignition switch off, the Data List item changes to "OK".
| OK |
|
END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
|
|