Dtc B2285 Steering Lock Position Signal Circuit Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

READ VALUE USING GTS (STEERING UNLOCK SWITCH)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (GROUND)

INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

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

DESCRIPTION

HINT:

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the engine switch is on (IG)
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus:
   Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
   
2. The entry and start system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
   
3. Before replacing the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) refer to the entry and start system (for Start Function) precaution (Click here).
   
4. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
   
5. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
   

1. Check for DTCs (Click here).
   

   OK:

   LIN communication system DTC B2785 is not output simultaneously.
   

   HINT:

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

1. Connect the GTS to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the GTS on.
   

4. Enter the following menus: Body Electrical / Power Source Control / Data List.
   

5. According to the display on the GTS, 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 unlocked OFF: Steering locked	When the shift lever is in P (for Automatic Transmission) and the engine switch is off, if any door is opened then closed, the steering is locked. When the key is inside the vehicle 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.

   Result

   Result		Proceed to
   Data List item does not change		A
   Data List item changes	for Manual Tilt and Manual Telescopic Steering Column	B
   	for Power Tilt and Power Telescopic Steering Column	C

1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E130-10 (+B) - Body ground	Always	11 to 14 V

   Text in Illustration

   *a	Front view of wire harness connector (to Certification ECU (smart key ECU assembly))

1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E130-11 (E) - Body ground	Always	Below 1 Ω

   Text in Illustration

   *a	Front view of wire harness connector (to Certification ECU (smart key ECU assembly))

1. Reconnect the E26 steering lock ECU (steering lock actuator assembly) connector.
   

2. Reconnect the E130 certification ECU (smart key ECU assembly) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   Positive (+) tester probe → E26-4 (SLP1) Negative (-) tester probe → Body ground	Steering locked*	10 kΩ or higher
   	Steering unlocked*	Below 1 Ω

   HINT:

   1. *: If any of the doors are opened then closed with the shift lever in P and the engine switch off, the steering wheel will be locked. If the engine switch is then turned on (ACC) or on (IG), the steering wheel will be unlocked.
      
   2. DTC B2285 may be stored due to a malfunction in the steering lock ECU (steering lock actuator assembly). The steering lock position signal and unlock position signal are sent from the steering lock ECU (steering lock actuator assembly) to the certification ECU (smart key ECU assembly) individually.
      

   Text in Illustration

   *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))

   Result

   Result		Proceed to
   OK		A
   NG	for Manual Tilt and Manual Telescopic Steering Column	B
   	for Power Tilt and Power Telescopic Steering Column	C

1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.
   

2. Disconnect the E26 steering lock ECU (steering lock actuator assembly) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E130-23 (SLP) - E26-4 (SLP1)	Always	Below 1 Ω
   E130-23 (SLP) or E26-4 (SLP1) - Body ground		10 kΩ or higher