DTC B2782: Power Source Control ECU Malfunction: Procedure

1. Check the DTCs.

   OK

   DTC B2782 is output, but DTC B2785 is not output.

NG → See step   5 

OK: Go to next step 

Fig 1: Steering Lock ECU

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
   3 (IGE) - 1 (GND)	Power switch ON (IG) Steering lock motor is operating	Below 1 V
   3 (IGE) - 1 (GND)	Power switch ON (IG) Steering lock motor is not operating	11 to 14 V

   HINT: 

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

NG → See step   4 

OK → See step   3 

Fig 2: Checking Harness And Connector (Steering Lock ECU - Main Body ECU And Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L33 steering lock ECU connector.
2. Disconnect the L13 main body ECU 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
   L33-1 (GND) - Body ground	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