DESCRIPTION
The 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 certification ECU (smart key ECU assembly), 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 Item |
Active Test Item |
---|---|---|
Unable to unlock steering wheel (Engine cannot start) |
Smart Key
|
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
Click here
Click here
PROCEDURE
1. |
CHECK ENGINE SWITCH (SWITCH CONDITION) |
(a) Check the power source mode change.
(1) 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
NG |
GO TO SMART KEY SYSTEM (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 |
Proceed to |
---|---|
Steering Lock active is displayed. |
A |
Steering Lock active is not displayed. |
B |
B |
GO TO STEP 4 |
|
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 |
Proceed to |
---|---|
The steering is unlocked. |
A |
The steering is not unlocked. |
B |
A |
END |
|
4. |
CHECK FOR DTC |
(a) Using the Techstream, check if the certification ECU (smart key ECU assembly) DTC is output.
Body Electrical > Smart Key > Trouble Codes
Result |
Proceed to |
---|---|
DTCs are not output. |
A |
DTCs are output. |
B |
B |
GO TO DIAGNOSTIC PROCEDURE INDICATED BY OUTPUT DTC |
|
5. |
READ VALUE USING VALUE USING TECHSTREAM (UNLOCK REQUEST RECEIVE) |
(a) Use the Data List to check if the steering lock request is functioning properly.
Body Electrical > Smart Key > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
Unlock Request Receive |
Reception state of steering unlock request signal by certification ECU (smart key ECU assembly) sent to ID code box (immobiliser code ECU) HINT:
|
OK or NG |
OK: Unlock request received within 10 seconds of turning engine switch on (IG) or on (ACC) or starting engine NG: Except above |
|
Tester Display |
---|
Unlock Request Receive |
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".
NG |
GO TO STEP 14 |
|
6. |
READ VALUE USING VALUE USING TECHSTREAM (S CODE CHECK) |
(a) Use the Data List to check if S code certification is functioning properly.
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 a malfunction is present:
|
Tester Display |
---|
S Code Check |
OK:
OK is displayed on the Techstream.
HINT:
Reasons for verification failure:
NG |
GO TO STEP 13 |
|
7. |
READ VALUE USING VALUE USING TECHSTREAM (L CODE CHECK) |
(a) Use the Data List to check if L code certification is functioning properly.
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 a malfunction is present:
|
Tester Display |
---|
L Code Check |
OK:
OK is displayed on the Techstream.
HINT:
Reasons for verification failure:
NG |
GO TO STEP 12 |
|
8. |
INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
(a) Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance:
NOTICE: If the result is not as specified, check for looseness in the ground cable connection. Standard Voltage:
|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
CHECK HARNESS AND CONNECTOR (GROUND) |
(a) Disconnect the F78 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:
NOTICE: If the result is not as specified, check for looseness in the ground cable connection. |
|
(c) Check the signal waveform according to the condition(s) in the table below. Standard Frequency:
HINT:
|
|
OK |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
10. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(b) Disconnect the F78 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(c) Disconnect the F1 certification ECU (smart key ECU assembly) connector.
(d) Check for deformation and corrosion of the connector case and terminals.
OK:
There is no deformation or corrosion of the connector case or terminals.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F78-3 (IGEI) - F1-25 (SLR+) |
Always |
Below 1 Ω |
F78-3 (IGEI) or F1-25 (SLR+) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
11. |
INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
(a) Reconnect the F78 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(b) Reconnect the F1 certification ECU (smart key ECU assembly) connector.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
12. |
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.
Click here
(b) Perform registration.
Click here
(c) Turn the engine switch on (IG).
(d) Use the Data List to check if L code certification is functioning properly again.
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 a malfunction is present:
|
Tester Display |
---|
L Code Check |
OK:
OK is displayed on the Techstream.
OK |
END |
NG |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
13. |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Replace the certification ECU (smart key ECU assembly) with a new one.
(b) Perform registration.
Click here
(c) Use the Data List to check if S code certification is functioning properly.
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 a malfunction is present:
|
Tester Display |
---|
S Code Check |
OK:
OK is displayed on the Techstream.
OK |
END |
NG |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
14. |
INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
NG |
GO TO STEP 17 |
|
15. |
READ VALUE USING VALUE USING TECHSTREAM (STEERING UNLOCK) |
(a) Check that the steering is locked.
(b) Read the Data List according to the display on the Techstream.
Body Electrical > Smart Key > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
Steering Unlock |
State of whether steering lock ECU (steering lock actuator or upper bracket assembly) determined steering is unlocked |
Set or Unset |
Set: Steering unlocked Unset: Steering locked |
If this item displays "Unset", the steering does not unlock (engine cannot be started). |
Tester Display |
---|
Steering Unlock |
OK:
Set is displayed on the Techstream.
NG |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
16. |
READ VALUE USING VALUE USING TECHSTREAM (UNLOCK REQUEST RECEIVE) |
(a) Replace the certification ECU (smart key ECU assembly) with a new one.
(b) Perform registration.
Click here
(c) Turn the engine switch on (IG).
(d) Use the Data List to check if the steering lock request is functioning properly.
Body Electrical > Smart Key > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
Unlock Request Receive |
Reception state of steering unlock request signal by certification ECU (smart key ECU assembly) sent to ID code box (immobiliser code ECU) HINT:
|
OK or NG |
OK: Unlock request received within 10 seconds of turning engine switch on (IG) or on (ACC) or starting engine NG: Except above |
|
Tester Display |
---|
Unlock Request Receive |
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".
OK |
END |
NG |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
17. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(b) Disconnect the F78 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(c) Disconnect the F1 certification ECU (smart key ECU assembly) connector.
(d) Check for deformation and corrosion of the connector case and terminals.
OK:
There is no deformation or corrosion of the connector case or terminals.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F78-4 (SLP1) - F1-14 (SLP) |
Always |
Below 1 Ω |
F78-4 (SLP1) or F1-14 (SLP) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
18. |
READ VALUE USING VALUE USING TECHSTREAM (UNLOCK REQUEST RECEIVE) |
(a) Replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one.
Click here
(b) Perform registration.
Click here
(c) Turn the engine switch on (IG).
(d) Use the Data List to check if the steering lock request is functioning properly.
Body Electrical > Smart Key > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
Unlock Request Receive |
Reception state of steering unlock request signal by certification ECU (smart key ECU assembly) sent to ID code box (immobiliser code ECU) HINT:
|
OK or NG |
OK: Unlock request received within 10 seconds of turning engine switch on (IG) or on (ACC) or starting engine NG: Except above |
|
Tester Display |
---|
Unlock Request Receive |
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".
OK |
END |
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Toyota CH-R Service Manual > Lighting (ext): Side Turn Signal Light Bulb
Components
COMPONENTS
ILLUSTRATION
*1
OUTER MIRROR COVER
*2
SIDE TURN SIGNAL BULB
*3
SIDE TURN SIGNAL LIGHT SOCKET
*4
SIDE TURN SIGNAL LIGHT ASSEMBLY
Removal
REMOVAL
CAUTION / NOTICE / ...
Toyota CH-R Service Manual > Meter / Gauge System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Meter / Gauge System
DTC No.
Detection Item
Memory
Link
B1500
Fuel Sender Open Detected
-
B1507
Open in Turn Signal Circuit
DTC store ...