DTC B2285: Steering Lock Position Signal Circuit Malfunction: Procedure

1. Check for DTCs. Refer to 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 → See step   7 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Power Source Control / Data List.
5. 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 → See step   5 

A: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 1: Inspecting D29 Steering Lock Actuator Assembly Connector (Steering Lock ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 → See step   9 

OK: Go to next step 

1. Disconnect the D89 power management control ECU connector.
2. Disconnect the D29 steering lock ECU connector.
3. 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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8