Smart Key
- Unlock Request Receive
- S Code Check*
- L Code Check
- Steering Unlock
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001G22N |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - 08/2020] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Unable to Unlock Steering Wheel (Engine cannot Start); 2019 - 2020 MY RAV4 [11/2018 - 08/2020] | ||
|
Unable to Unlock Steering Wheel (Engine cannot Start) |
DESCRIPTION
The steering lock ECU (steering lock actuator with ECU 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 and Active Test |
|---|---|
|
Unable to unlock steering wheel (Engine cannot start) |
|
- *: w/o Occupant Classification System
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
-
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
![2019 - 2020 MY RAV4 [11/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- After completing repairs, confirm that the problem does not recur.
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
- Make sure that no DTCs are output. If any DTCs are output, proceed to the 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 with ECU assembly), certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU)*, refer to the Registration.
Click here
- *: w/o Occupant Classification System
PROCEDURE
|
1. |
CHECK POWER SOURCE MODE CHANGING FUNCTION (SWITCH CONDITION) |
(a) Check the power source mode change.
Click here
OK:
The power source mode changes to on (IG).
| NG |
|
GO TO SMART KEY SYSTEM (for Start Function) (Power Source Mode does not Change to ON (IG and ACC)) |
|
|
2. |
CHECK INDICATOR |
(a) With the engine switch on (IG), check that push engine switch while turning steering wheel in either direction is displayed on the multi-information display in the combination meter assembly.
|
Result |
Proceed to |
|---|---|
|
Push engine switch while turning steering wheel in either direction is displayed. |
A |
|
Push engine switch while turning steering wheel in either direction is not displayed. |
B |
| B |
|
|
|
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 (STEERING LOCK IS NORMAL) |
|
|
4. |
CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
(e) Check for DTCs and note any DTCs that are output.
Body Electrical > Smart Key > Trouble Codes
Body Electrical > Power Source Control > 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 TECHSTREAM (UNLOCK REQUEST RECEIVE) |
(a) Enter the following menus: Body Electrical / Smart Key / Data List.
(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 |
|---|---|---|---|---|
|
Unlock Request Receive |
Status of steering unlock command from certification ECU (smart key ECU assembly) |
OK or NG |
OK: Unlock request signal received within 10 seconds of engine switch being turned on (IG) or on (ACC) or of an engine start operation being performed NG: Engine switch not turned on (IG) or on (ACC) and engine start operation not being performed |
|
Body Electrical > Smart Key > Data List
|
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 |
|
|
|
6. |
CHECK VEHICLE TYPE |
(a) Check vehicle condition.
| w/ Occupant Classification System |
|
|
|
7. |
READ VALUE USING TECHSTREAM (S CODE CHECK) |
(a) Enter the following menus: Body Electrical / Smart Key / Data List.
(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 |
|---|---|---|---|---|
|
S Code Check |
S code verification result |
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 Techstream.
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 is replaced, but is not registered.
- An ECU is replaced with an ECU which has a code already stored in it.
| NG |
|
|
|
8. |
READ VALUE USING TECHSTREAM (L CODE CHECK) |
(a) Enter the following menus: Body Electrical / Smart Key / Data List.
(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 |
|---|---|---|---|---|
|
L Code Check |
Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator with ECU 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 Techstream.
HINT:
Reasons for verification failure:
- The steering lock ECU (steering lock actuator with 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.
| NG |
|
|
|
9. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) - POWER SUPPLY AND BODY GROUND) |
(a) Disconnect the G56 steering lock ECU (steering lock actuator with ECU assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G56-1 (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 |
|---|---|---|
|
G56-7 (B) - Body ground |
Always |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) (MOTOR ACTIVATION COMMAND SIGNAL) |
(a) Reconnect the steering lock ECU (steering lock actuator with ECU assembly) connector.
|
(b) Using an oscilloscope, check the waveform. OK:
HINT:
|
|
| OK |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
|
|
11. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)) |
(a) Disconnect the G56 steering lock ECU (steering lock actuator with ECU assembly) connector.
(b) Disconnect the G54 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 |
|---|---|---|
|
G56-3 (IGE) - G54-25 (SLR+) |
Always |
Below 1 Ω |
|
G56-3 (IGE) or G54-25 (SLR+) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
12. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
(a) Reconnect the steering lock ECU (steering lock actuator with ECU assembly) connector.
|
(b) 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 WITH ECU ASSEMBLY) |
|
13. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
(a) Replace the steering lock ECU (steering lock actuator with ECU assembly) with a new one.
Click here
(b) Enter the following menus: Body Electrical / Smart Key / Data List.
(c) 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 |
|---|---|---|---|---|
|
L Code Check |
Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator with ECU 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 Techstream.
| OK |
|
END (STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
|
|
14. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Replace the certification ECU (smart key ECU assembly) with a new one and perform registration again.
Click here
HINT:
Refer to Registration.
Click here
(b) Enter the following menus: Body Electrical / Smart Key / Data List.
(c) 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 |
|---|---|---|---|---|
|
S Code Check |
S code verification result |
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 Techstream.
| OK |
|
END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
|
|
15. |
READ VALUE USING TECHSTREAM (L CODE CHECK) |
(a) Enter the following menus: Body Electrical / Smart Key / Data List.
(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 |
|---|---|---|---|---|
|
L Code Check |
Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator with ECU 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 Techstream.
HINT:
Reasons for verification failure:
- The steering lock ECU (steering lock actuator with ECU 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 |
|
|
|
16. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) - POWER SUPPLY AND BODY GROUND) |
|
(a) Disconnect the steering lock ECU (steering lock actuator with ECU assembly) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G56-1 (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 |
|---|---|---|
|
G56-7 (B) - Body ground |
Always |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) (MOTOR ACTIVATION COMMAND SIGNAL) |
(a) Reconnect the steering lock ECU (steering lock actuator with ECU assembly) connector.
|
(b) Using an oscilloscope, check the waveform. OK:
HINT:
|
|
| OK |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
|
|
18. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)) |
(a) Disconnect the G56 steering lock ECU (steering lock actuator with ECU assembly) connector.
(b) Disconnect the G54 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 |
|---|---|---|
|
G56-3 (IGE) - G54-25 (SLR+) |
Always |
Below 1 Ω |
|
G56-3 (IGE) or G54-25 (SLR+) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
19. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
(a) Reconnect the steering lock ECU (steering lock actuator with ECU assembly) connector.
|
(b) 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 WITH ECU ASSEMBLY) |
|
20. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
(a) Replace the steering lock ECU (steering lock actuator with ECU assembly) with a new one and perform registration again.
Click here
HINT:
Refer to Registration.
Click here
(b) Enter the following menus: Body Electrical / Smart Key / Data List.
(c) 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 |
|---|---|---|---|---|
|
L Code Check |
Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator with ECU 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 Techstream.
| OK |
|
END (STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
21. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
|
|
22. |
READ VALUE USING TECHSTREAM (STEERING UNLOCK) |
(a) Check that the steering is locked.
(b) Enter the following menus: Body Electrical / Smart Key / Data List.
(c) 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 |
Steering lock ECU (steering lock actuator with ECU 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 > Smart Key > Data List
|
Tester Display |
|---|
|
Steering Unlock |
OK:
Set is displayed on the Techstream.
| NG |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
|
|
23. |
READ VALUE USING TECHSTREAM (UNLOCK REQUEST RECEIVE) |
(a) Replace the certification ECU (smart key ECU assembly) with a new one.
Click here
(b) Perform registration.
HINT:
Refer to Registration.
Click here
(c) Enter the following menus: Body Electrical / Smart Key / Data List.
(d) 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 |
|---|---|---|---|---|
|
Unlock Request Receive |
Status of steering unlock command from certification ECU (smart key ECU assembly) |
OK or NG |
OK: Unlock request signal received within 10 seconds of engine switch being turned on (IG) or on (ACC) or of an engine start operation being performed NG: Engine switch not turned on (IG) or on (ACC) and engine start operation not being performed |
|
Body Electrical > Smart Key > Data List
|
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 (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) |
|
24. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)) |
(a) Disconnect the G56 steering lock ECU (steering lock actuator with ECU assembly) connector.
(b) Disconnect the G54 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 |
|---|---|---|
|
G56-4 (SLP1) - G54-14 (SLP) |
Always |
Below 1 Ω |
|
G56-4 (SLP1) or G54-14 (SLP) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
25. |
READ VALUE USING TECHSTREAM (UNLOCK REQUEST RECEIVE) |
(a) Replace the steering lock ECU (steering lock actuator with ECU assembly) with a new one.
Click here
(b) Perform registration.
HINT:
Refer to Registration.
Click here
(c) Enter the following menus: Body Electrical / Smart Key / Data List.
(d) 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 |
|---|---|---|---|---|
|
Unlock Request Receive |
Status of steering unlock command from certification ECU (smart key ECU assembly) |
OK or NG |
OK: Unlock request signal received within 10 seconds of engine switch being turned on (IG) or on (ACC) or of an engine start operation being performed NG: Engine switch not turned on (IG) or on (ACC) and engine start operation not being performed |
|
Body Electrical > Smart Key > Data List
|
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 (STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) WAS DEFECTIVE) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
|