DTC B2782: Power Source Control ECU Malfunction: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying K28 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   K28-3 (IGE) - K28-2 (SGND)	Power switch OFF Turn the power switch ON (ACC or IG)	Motor active: Below 1 V Motor not active: 10 to 12 V
   K28-3 (IGE) - K28-2 (SGND)	Adjust the shift lever to the P position Turn the power switch OFF Open the driver's door	Motor active: Below 1 V Motor not active: 10 to 12 V

   HINT: 

   The steering lock ECU is built into the steering lock actuator. These two parts are supplied as the steering column assembly.

OK → REPLACE STEERING COLUMN ASSEMBLY 

NG: Go to next step 

1. Disconnect the K28 connector from the steering lock actuator.
   Fig 2: Identifying K28 Connector

   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
   K28-2 (SGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the K73 connector from the power source control ECU.
   Fig 3: Identifying K28 And K73 Connectors

   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
   K28-3 (IGE) - K73-32 (SLR+)	Always	Below 1 Ω
   K28-3 (IGE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE POWER SOURCE CONTROL ECU