DTC B2285: Steering Lock Position Signal Circuit Malfunction: Procedure

1. Delete the DTC. Refer to DTC CHECK / CLEAR [08/2012 - ] .
2. Check for DTC B2785 and DTC B2287.

   OK

   DTC B2785 and DTC B2287 are not output.

   HINT: 

   • If DTC B2785 is output. Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN; DTC B2786: No Response from Steering Lock ECU; DTC B2789: No Response from ID BOX .
   • If DTC B2287 is output. Refer to DTC B2287: LIN Communication Master Malfunction .

NG → GO TO DTC CHART 

OK: Go to next step 

1. Check that the connectors are securely connected and the terminals are not deformed or loose.

   OK

   The connectors are securely connected and the terminals are not deformed or loose.

NG → REPAIR OR REPLACE CONNECTORS 

OK: Go to next step 

1. Disconnect the ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-6 (GND2) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the J29 ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-26 (SLP) - J29-4 (SLP1)	Always	Below 1 Ω
   J55-30 (LIN1) - J29-5 (LIN)	Always	Below 1 Ω
   J55-26 (SLP) or J29-4 (SLP1) - Body ground	Always	10 kΩ or higher
   J55-30 (LIN1) or J29-5 (LIN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the J55 ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the oscilloscope to the power source control ECU terminals specified in the table below and check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Terminal (Symbols)	J55-26 (SLP) - Body ground
   Equipment Setting	2 V/DIV., 100 ms./DIV.
   Condition	Engine switch on (IG)

   OK

   The waveform appears as shown in the illustration.

   HINT: 

   The waveform varies depending on the contents of communication.

NG → REPLACE POWER SOURCE CONTROL ECU 

OK: Go to next step 

1. Reconnect the J29 ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the oscilloscope to the power source control ECU terminals specified in the table below and check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Terminal (Symbols)	J55-26 (SLP) - Body ground
   Equipment Setting	2 V/DIV., 100 ms./DIV.
   Condition	Steering is LOCK / UNLOCK

   OK

   The waveform appears as shown in the illustration.

   HINT: 

   The waveform varies depending on the contents of communication.

NG → REPLACE STEERING LOCK ECU 

OK → REPLACE POWER SOURCE CONTROL ECU