Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001L7QB
Model Year Start: 2020 Model: RAV4 Prod Date Range: [10/2019 - 12/2021]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): B2285; Steering Lock Position Signal Circuit Malfunction; 2020 - 2021 MY RAV4 [10/2019 - 12/2021]

DTC

B2285

Steering Lock Position Signal Circuit Malfunction

DESCRIPTION

This DTC is stored when the steering lock position signal sent by the steering lock ECU (steering lock actuator with ECU assembly) via direct line and the steering lock position signal sent via LIN communication do not match.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B2285

Steering Lock Position Signal Circuit Malfunction

The steering lock position signal sent by the steering lock ECU (steering lock actuator with ECU assembly) via direct line and the steering lock position signal sent via LIN communication do not match. (1-trip detection logic*)
  • LIN communication system
  • Steering lock ECU (steering lock actuator with ECU assembly)
  • Certification ECU (smart key ECU assembly)
  • Harness or connector

DTC Output Confirmation Operation:

  • Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and then reconnect the cable to the negative (-) battery terminal. Wait at least 40 seconds with the engine switch off (wait is the steering locked), then turn the engine switch on (IG) (steering unlocked) and wait at least 40 seconds.
  • *: Only detected while a malfunction is present.

Vehicle Condition and Fail-safe Function when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected

The engine cannot be started.

The ECU does not send an engine start request.

Related Data List and Active Test Items

DTC No.

Data List and Active Test

B2285

Power Source Control

  • Steering Unlock Switch

Smart Key

  • Power Supply Short
  • Motor Driver Short
  • Lock Bar Stuck Error

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 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the certification ECU (smart key ECU assembly), steering lock ECU (steering lock actuator with ECU assembly), refer to the Registration.

    Click here 2020 MY RAV4 [10/2019 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

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.

Body Electrical > Smart Key > Trouble Codes

HINT:

  • If the steering cannot be unlocked, the engine switch cannot be turned on (IG) and the engine cannot be started.
  • If LIN communication is not available, the steering cannot be locked or unlocked.

Result

Proceed to

DTC B2785 is not output

A

DTC B2785 is output

B
B

GO TO DTC B2785

A

2.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G56-4 (SLP1) - Body ground

Engine switch on (IG)

11 to 14 V

G56-4 (SLP1) - Body ground

Engine switch off

Below 1 V

(c) Connect the steering lock ECU (steering lock actuator with ECU assembly) connector.

NG

GO TO STEP 6

OK

3.

READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH)

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

(b) 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

Steering Unlock Switch

State of steering unlock sensor signal output from steering lock ECU (steering lock actuator with ECU assembly)

OFF or ON

OFF: Steering locked

ON: Steering unlocked
  • When the shift state park (P) and the engine switch is off, if any door is opened, the steering is locked.
  • When the electrical key transmitter sub-assembly is in the cabin and the engine switch is turned on (ACC) or on (IG), the steering unlocks.
  • The engine cannot be started when the steering unlock signal is off.

Body Electrical > Power Source Control > Data List

Tester Display

Steering Unlock Switch

OK:

The Techstream display changes correctly in response to the steering lock/unlock status.

Result

Proceed to

Techstream display does not change

A

Techstream display changes

B
B

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

A

4.

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:

Tester Connection

Condition

Specified Condition

G56-4 (SLP1) - Body ground

Steering locked → unlocked*

11 to 14 V → Below 1.5 V

HINT:

  • *: If any of the doors are opened with the shift state park (P) and the engine switch off, the steering will be locked. If the engine switch is turned on (ACC) or on (IG) with the electrical key transmitter sub-assembly in the cabin, the steering will be unlocked.
  • DTC B2285 may be stored due to a malfunction in the steering lock ECU (steering lock actuator with ECU assembly). The steering lock position signal and unlock position signal are sent from the steering lock ECU (steering lock actuator with ECU assembly) to the certification ECU (smart key ECU assembly) individually.

*a

Component with harness connected

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

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

OK

5.

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) w/ Telematics System:

Disconnect the G131 DCM (telephone transceiver assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G54-14 (SLP) - G56-4 (SLP1)

Always

Below 1 Ω

G54-14 (SLP) or G56-4 (SLP1) - Other terminals and body ground

Always

10 kΩ or higher

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G54-14 (SLP) or G56-4 (SLP1) - Body ground

Always

Below 1 V
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

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) w/ Telematics System:

Disconnect the G131 DCM (telephone transceiver assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G54-14 (SLP) - G56-4 (SLP1)

Always

Below 1 Ω

G54-14 (SLP) or G56-4 (SLP1) - Other terminals and body ground

Always

10 kΩ or higher

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G54-14 (SLP) or G56-4 (SLP1) - Body ground

Always

Below 1 V
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR