DTC B2782: Power Source Control ECU Malfunction: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying E39 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E39-3 (IGE) - E39-1 (GND)	The specified condition should be checked after performing the following: Turn the engine switch off Turn the engine switch on (ACC or IG)	Motor activated: Below 1 V Motor not activated: 11 to 14 V
   E39-3 (IGE) - E39-1 (GND)	The specified condition should be checked after performing the following: Move the shift lever to P Turn the engine switch off Open the driver's door	Motor activated: Below 1 V Motor not activated: 11 to 14 V

   HINT: 

   The steering lock ECU and steering lock actuator assembly are supplied as a unit.

NG → See step   2 

OK → See step   4 

1. Disconnect the E39 connector from the steering lock actuator assembly.
   Fig 2: Identifying E39 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
   E39-1 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E50 connector from the main body ECU.
   Fig 3: Identifying E39 & E50 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
   E39-3 (IGE) - E50-7 (SLR+)	Always	Below 1 Ω
   E39-3 (IGE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU