DTC B2285 Steering Lock Position Signal Circuit Malfunction; DTC B2288 Steering Lock Signal Circuit Malfunction: Wiring Diagram

1. Delete the DTC (See DIAGNOSIS SYSTEM  ).

   HINT:

   After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG).

2. Check for DTCs again.

   OK: No DTC is output. 

OK : CHECK INTERMITTENT PROBLEMS 

NG : GO TO NEXT STEP 

1. Connect the intelligent tester (with CAN VIM) to the DLC3.
2. Turn the engine switch on (IG).
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
4. Check the DATA LIST for proper functioning of the steering lock condition.

   Power source control ECU: 

   DATA LIST
   
   

   Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
   STR UNLOCK SW	Steering lock condition/ ON or OFF	ON: Steering is unlocked OFF: Steering is locked	-

   OK: ON (steering is unlocked) and OFF (steering is locked) appear on the screen. 

NG : Go to step 3 

OK : REPLACE POWER SOURCE CONTROL ECU 

1. Disconnect the J55 ECU connector.
2. Disconnect the J29 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection (Symbols)	Specified Condition
   J55-26 (SLP) - J29-4 (SLP1)	Below 1 Ω
   J55-26 (SLP) or J29-4 (SLP1) - Body ground	10 kΩ or higher

   Fig 2: Identifying J55 Power Source Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : GO TO NEXT STEP 

1. Temporarily replace the power source control ECU with a new or normally functioning one.
2. Check that the engine starts normally.

   OK: Engine starts normally. 

NG : REPLACE STEERING LOCK ECU 

OK : END (POWER SOURCE CONTROL ECU IS DEFECTIVE)