DTC B2782: Power Source Control ECU Malfunction: Procedure

1. Check the DTCs. Refer to DTC CHECK/CLEAR .

   OK

   DTC B2782 is output, but DTC B2785 (LIN bus line malfunction) is not output.

NG → See step   5 

OK: Go to next step 

Fig 1: Identifying L33 Steering Lock Actuator Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   L33-3 (IGE) - L33-2 (SGND)	Engine switch on (IG) (When steering lock motor is operating)	Below 1 V
   	Engine switch on (IG) (When steering lock motor is not operating)	11 to 14 V

   HINT: 

   When the steering lock is activated and the engine switch is turned on (IG), the steering lock motor activates to release the steering lock. The motor operation occurs for 2 to 15 seconds.

OK → REPLACE STEERING LOCK ACTUATOR 

NG: Go to next step 

Fig 2: Identifying L33 Steering Lock Actuator Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L33 steering lock actuator connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L33-2 (SGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 3: Identifying L13 Main Body ECU And L33 Steering Lock Actuator Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L33-3 (IGE) - L13-19 (SLR+)	Always	Below 1 Ω
   L33-3 (IGE) or L13-19 (SLR+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU