DTC B2285, B2288: Steering Lock Position Signal Circuit Malfunction; Steering Lock Signal Circuit Malfunction: Procedure

1. Use the Data List to check if the steering lock condition is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Steering Unlock Switch	Steering lock condition/ON or OFF	ON: Steering is unlocked OFF: Steering is locked	-

   OK

   ON appears on the screen.

NG → REPLACE MAIN BODY ECU 

OK: Go to next step 

Fig 1: Identifying L13 Main Body ECU And L33 Steering Lock ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L13 main body ECU connector.
2. Disconnect the L33 steering lock ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L13-18 (SLP) - L33-4 (SLP1)	Always	Below 1 Ω
   L13-18 (SLP) or L33-4 (SLP1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the main body ECU with a new or normally functioning one.
2. Check that the engine starts normally.

   OK

   Engine starts normally.

NG → See step   4 

OK → END (MAIN BODY ECU IS FAULTY)