DESCRIPTION This DTC is
stored when the steering lock position signal sent by the steering lock
ECU (steering lock actuator or upper bracket 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 or upper bracket assembly) via direct line and the
steering lock position signal sent via LIN communication do not match.
(1-trip detection logic*1) |
- LIN communication system
- Steering lock ECU (steering lock actuator or upper bracket assembly)
- Certification ECU (smart key ECU assembly)
- Wire harness or connector
- DCM (telematics transceiver)*2
|
- 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.
|
- *1: Only detected while a malfunction is present and the engine switch is on (IG).
- *2: for Toyota Entune Remote Connect Compatible Type
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
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, Gasoline Model) 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, Gasoline Model)
after confirming that the communication systems are functioning
properly.
Click here 
- Inspect the fuses of circuits related to this system before performing the following procedure.
- Before replacing the certification ECU (smart key ECU assembly),
steering lock ECU (steering lock actuator or upper bracket assembly) or
DCM (telematics transceiver)*, refer to Registration.
Click here
- *: for Toyota Entune Remote Connect Compatible Type
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE (a) 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.
OK: LIN communication system DTC B2785 is not output simultaneously.
| NG |
 | GO TO DTC B2785 |
|
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) 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 or upper bracket assembly) |
OFF or ON | OFF: Steering locked
ON: Steering unlocked |
- When the shift lever is in P and the engine switch is off, if any door is opened or closed, 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.
| OK |
| REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
NG | |
| |
| 3. |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
| (a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G43-4 (SLP1) - Body ground |
Positive (+) tester probe → G43-4 (SLP1) Negative (-) tester probe → Body ground |
Steering locked → unlocked* |
10 kΩ or higher → Below 1 Ω |
HINT:
- *: If any of the doors are opened with the shift lever in 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 or upper bracket assembly). The steering lock
position signal and unlock position signal are sent from the steering
lock ECU (steering lock actuator or upper bracket assembly) to the
certification ECU (smart key ECU assembly) individually.
|
 |
|
*a | Component with harness connected (Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)) | | |
|
Result | Proceed to | |
OK (except Toyota Entune Remote Connect Compatible Type) |
A | | OK (for Toyota Entune Remote Connect Compatible Type) |
B | | NG |
C |
| B |
| GO TO STEP 5 |
| C |
| REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
|
A | |
| |
| 4. |
CHECK
HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) -
STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)) |
(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G40-14 (SLP) - G43-4 (SLP1) |
Always | Below 1 Ω | |
G40-14 (SLP) or G43-4 (SLP1) - Other terminals and body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 5. |
CHECK
HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) -
STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) -
DCM) | (a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(c) Disconnect the G9 DCM (telematics transceiver) connector. (d) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G40-14 (SLP) - G43-4 (SLP1) |
Always | Below 1 Ω | |
G43-4 (SLP1) - G9-29 (SLPD) |
Always | Below 1 Ω | |
G40-14 (SLP), G43-4 (SLP1) or G9-29 (SLPD) - 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 | |
G40-14 (SLP), G43-4 (SLP1) or G9-29 (SLPD) - Body ground |
Always | Below 1 V |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 6. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Check the push-button start function. (1) Enter the vehicle while carrying an electrical key transmitter sub-assembly.
(2) Depress the brake pedal with the shift lever in P. (3) Check that the engine starts when the engine switch is pressed.
|
Result | Proceed to | |
Engine starts | A | |
Engine does not start |
B |
| A |
| REPLACE DCM (TELEMATICS TRANSCEIVER) |
| B |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) | | 
