DTC B2786: No Response from Steering Lock ECU: Procedure

1. Disconnect the A23 and A24 transmission control ECU assembly connectors.
   Fig 1: Identifying Transmission Control ECU Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance and voltage according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A24-6 (E01) - Body ground	Always	Below 1 Ω
   A24-5 (E02) - Body ground	Always	Below 1 Ω

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A23-15 (BATT) - Body ground	Power switch off	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Transmission Control ECU Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.
   Fig 2: Identifying Certification ECU And Transmission Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L62-29 (LIN) - A24-24 (LIN)	Always	Below 1 Ω
   L62-29 (LIN) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))
   *2	Front view of wire harness connector (to Transmission Control ECU Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the transmission control ECU assembly. Refer to REMOVAL .

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Recheck for DTCs.

   OK

   DTC B2786 is not output.

NG → See step   5 

OK → END (TRANSMISSION CONTROL ECU ASSEMBLY WAS DEFECTIVE)