Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJJQ
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Start Function): B2285; Steering Lock Position Signal Circuit Malfunction; 2016 - 2020 MY Sienna [12/2015 -        ]

DTC

B2285

Steering Lock Position Signal Circuit Malfunction

DESCRIPTION

This DTC is stored when a mismatch between the steering lock position signal from the direct line sent by the steering lock ECU and the steering lock position signal sent via LIN communication is detected.

HINT:

  • When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
  • When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.

DTC Code

DTC Detection Condition

Trouble Area

DTC Output Confirmation Operation

B2285

Mismatch between the steering lock position signal from the direct line sent by the steering lock ECU and the steering lock position signal sent via LIN communication (1-trip detection logic*).
  • AM2 No.2 fuse
  • Steering lock actuator assembly (steering lock ECU)
  • Power management control ECU
  • LIN communication system
  • Harness or connector

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

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.

An engine start command is not output.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
  • The smart key system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting( 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2018 - 2020 MY Sienna [11/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING ).
  • Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  • When replacing the steering lock actuator assembly (steering lock ECU), registration must be performed (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION ).
  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Related Data List and Active Test Items

DTC

Data List Item

Active Test Item

B2285

Power Source Control

  • Steering Unlock Switch

Smart Key

  • IG2 Status
  • IG(Lin)
  • Power Supply Short
  • Power Supply Open
  • Lock Bar Stuck Error
  • Motor Driver Short
  • Motor Driver Open

-

HINT:

If the engine switch indicator is blinking in green, the steering lock bar may be stuck.

PROCEDURE

1.

CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

(a) Check for DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

OK:

LIN communication system DTC B2287 is not output simultaneously.

HINT:

  • If the lock and unlock functions of the steering lock do not operate, the engine switch cannot be turned on (IG) and the engine cannot be started.
  • If LIN communication does not function, the steering lock cannot be locked or unlocked.
NG

GO TO DTC B2287

OK

2.

READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH)

(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 / Power Source Control / Data List.

(e) According to the display on the Techstream, read the Data List.

Power Source Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Steering Unlock Switch

State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF

ON: Steering lock unlocked*1

OFF: Steering lock locked*2
  • When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock is locked.
  • When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks.
  • The engine cannot be started when the steering unlock signal is off.

HINT:

  • If the engine switch cannot be turned on (IG), proceed to the next step.
  • *1: When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks.
  • *2: When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock is locked.

Result

Result

Proceed to

Data List item does not change

A

Data List item changes

B
B

GO TO STEP 5

A

3.

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Start Function): B2271; Ignition Hold Monitor Malfunction+

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE
OK

4.

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Start Function): B2271; Ignition Hold Monitor Malfunction+

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

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

HINT:

DTC P2285 may be stored due to an internal malfunction in the steering lock actuator. Lock and unlock position signals are sent separately to the power management control ECU from the steering lock actuator assembly to identify the steering lock position.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Positive (+) tester probe → D29-4 (SLP1)

Negative (-) tester probe → Body ground

Steering lock locked*1

10 kΩ or higher

Positive (+) tester probe → D29-4 (SLP1)

Negative (-) tester probe → Body ground

Steering lock unlocked*2

Below 1 Ω

HINT:

  • *1: When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks.
  • *2: When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock is locked.
  • With the connector connected to the ECU, measure the resistance from the rear of the connector.

Text in Illustration

*a

Component with harness connected

(Steering Lock ECU)
NG

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

OK

6.

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU)

(a) Disconnect the D89 power management control ECU connector.

(b) Disconnect the D29 steering lock ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D89-3 (SLP) - D29-4 (SLP1)

Always

Below 1 Ω

D89-3 (SLP) or D29-4 (SLP1) - Body ground

Always

10 kΩ or higher
OK

REPLACE POWER MANAGEMENT CONTROL ECU

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; POWER DISTRIBUTION: POWER MANAGEMENT CONTROL ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; POWER DISTRIBUTION: POWER MANAGEMENT CONTROL ECU: REMOVAL )
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR