Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QT4Z
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 - 12/2021]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Steering Lock does not Lock; 2021 MY RAV4 [08/2020 - 12/2021]

Steering Lock does not Lock

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.

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

Smart Key

  • Lock Request Receive
  • L Code Check
  • Steering Lock

Main Body

  • FL Door Courtesy SW

Power Source Control

  • Shift P Signal

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.
  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • 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 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.
  • After completing repairs, confirm that the problem does not recur.
  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
  • Before replacing the steering lock ECU (steering lock actuator with ECU assembly), certification ECU (smart key ECU assembly), refer to the Registration.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

PROCEDURE

1.

READ VALUE USING TECHSTREAM (LOCK REQUEST RECEIVE)

(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 / Data List.

(e) 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

Lock Request Receive

Status of steering lock command from certification ECU (smart key ECU assembly)

OK or NG

OK: Lock request signal received within 10 seconds of any of the doors being opened with shift state park (P) and engine switch off.

NG: Except above

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

Lock Request Receive

OK:

Within 10 seconds of any of the doors being opened with shift state park (P) and engine switch off, the Data List item changes to "OK".

NG

GO TO STEP 8

OK

2.

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:

  • The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator with ECU assembly) is not registered, or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator with ECU assembly) is malfunctioning.
  • The steering cannot be locked.
  • The steering cannot be unlocked (the engine cannot be started).

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

GO TO STEP 5

OK

3.

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.

*a

Front view of wire harness connector

(to Steering Lock ECU (Steering Lock Actuator with ECU Assembly))

(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
OK

4.

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:

Tester Connection

Tool Setting

Condition

Specified Condition

G56-3 (IGE) - G56-1 (GND)

2 V/DIV., 200 ms./DIV.

Any door opened when following conditions are met, and then steering lock motor activated:

  • Shift state park (P)
  • Steering lock unlocked in advance by carrying key and turning engine switch on (IG)
  • After above conditions are met, engine switch turned off

Pulse generation

(See waveform)

HINT:

  • 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 engine switch on (ACC) or on (IG).
    • To lock the steering, turn the engine switch off with the shift state park (P), and then open a door.

*a

Component with harness connected

(Steering Lock ECU (Steering Lock Actuator with ECU Assembly))

*b

Waveform

*c

Steering Lock Motor not Operating

*d

Steering Lock Motor Operating
OK

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)

NG

GO TO STEP 6

5.

READ VALUE USING TECHSTREAM (L CODE CHECK)

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

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: DISASSEMBLY

HINT:

Refer to Registration.

Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

(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:

  • The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator with ECU assembly) is not registered, or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator with ECU assembly) is malfunctioning.
  • The steering cannot be locked.
  • The steering cannot be unlocked (the engine cannot be started).

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)

6.

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) - CERTIFICATION ECU (SMART KEY 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
OK

7.

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:

Tester Connection

Condition

Specified Condition

G56-3 (IGE) - Body ground

Always

11 to 14 V

*a

Component with harness connected

(Steering Lock ECU (Steering Lock Actuator with ECU Assembly))
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)

8.

READ VALUE USING TECHSTREAM (DOOR COURTESY SW)

(a) Enter the following menus: Body Electrical / Main Body / Data List.

(b) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RR Door Courtesy SW

Rear door RH courtesy light switch

ON or OFF

ON: Rear door RH open

OFF: Rear door RH closed

-

RL Door Courtesy SW

Rear door LH courtesy light switch

ON or OFF

ON: Rear door LH open

OFF: Rear door LH closed

-

FR Door Courtesy SW

Front door courtesy light switch assembly RH signal

OFF or ON

OFF: Front door RH closed

ON: Front door RH open

-

FL Door Courtesy SW

Front door courtesy light switch assembly LH signal

OFF or ON

OFF: Front door LH closed

ON: Front door LH open

-

Body Electrical > Main Body > Data List

Tester Display

RR Door Courtesy SW

RL Door Courtesy SW

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.

NG

GO TO LIGHTING SYSTEM (DOOR COURTESY SWITCH CIRCUIT)

OK

9.

READ VALUE USING TECHSTREAM (SHIFT P SIGNAL)

(a) Move the shift state park (P).

(b) Enter the following menus: Body Electrical / Power Source Control / Data List.

(c) Read the Data List according to the display on the Techstream.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift P Signal

State of brake pedal

ON or OFF

ON: Shift state park (P)

OFF: Shift state not park (P)
  • Use this item to determine if the shift position switch is malfunctioning.
  • The engine cannot be started when this item is OFF.

Body Electrical > Power Source Control > Data List

Tester Display

Shift P Signal

OK:

Normal2 is displayed on the Techstream.

NG

GO TO STEP 11

OK

10.

READ VALUE USING TECHSTREAM (STEERING LOCK)

(a) Check that the steering is unlocked.

(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 Lock

Steering lock ECU (steering lock actuator with ECU assembly) lock confirmation status

Unset or Set

Unset: Lock not confirmed

Set: Lock confirmed

When Unset is displayed, the steering is not locked.

Body Electrical > Smart Key > Data List

Tester Display

Steering Lock

OK:

Set is displayed on the Techstream.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)

11.

CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY (OUTPUT TO CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G54-22 (P) - Other terminals and body ground

Shift state park (P) → Shift state not park (P)

9 V or higher → 2.76 V or less

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

12.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SHIFT LOCK CONTROL UNIT ASSEMBLY)

(a) Disconnect the G54 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the G26 shift lock control unit assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G54-22 (P) - G26-3 (P2)

Always

Below 1 Ω

G54-22 (P) or G26-3 (P2) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

13.

CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G54-22 (P) - Other terminals and body ground

Shift state park (P)

9 V or higher
OK

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

for 2WD:

Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): SHIFT LEVER: REMOVAL

for AWD:

Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; UB80E (AUTOMATIC TRANSMISSION / TRANSAXLE): SHIFT LEVER: REMOVAL

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)