DTC B2782: Power Source Control ECU Malfunction [12/2015 - ]: Procedure

1. Disconnect the D29 steering lock ECU connector.
2. Turn the engine switch off, make sure that the steering lock is unlocked and move the shift lever to P.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D29-1 (GND) - Body ground	Always	Below 1 Ω

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Reconnect the D29 steering lock ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D29-3 (IGE) - D29-1 (GND)	Steering lock motor operating immediately after turning engine switch from off to on (IG)	Below 1 V
   D29-3 (IGE) - D29-1 (GND)	Steering lock motor not operating	11 to 14 V

   HINT: 

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Steering Lock ECU)

Result: 

NG 

See step  5

Result: 

OK 

See step  3

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [12/2015 - ] ).
2. Disconnect and reconnect the cable to the negative (-) battery terminal to clear the malfunction history of Power Supply Open.

Result: 

NEXT 

See step  4

1. Check for DTCs (Refer to DTC CHECK / CLEAR [12/2015 - ] ).
2. Use the Data List to check if the steering lock control is functioning properly (Refer to DATA LIST / ACTIVE TEST [12/2015 - ] ).
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Power Supply Open	Open in ECU record/NG (PAST) or OK	NG (PAST): Open in ECU OK: No malfunction	-

   RESULT
   
   

   Result	Proceed to
   B2782 is not output "OK" is displayed on the Techstream.	A
   B2782 is output "NG (PAST)" is displayed on the Techstream.	B

Result: 

A 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2015 - 08/2016] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - ] )

Result: 

B 

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) 

(Refer to DISASSEMBLY [12/2015 - ] )

1. Disconnect the D89 power management control ECU connector.
2. Disconnect the D29 steering lock ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D29-3 (IGE) - D89-8 (SLR+)	Always	Below 1 Ω
   D29-3 (IGE) or D89-8 (SLR+) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [12/2015 - 11/2017] , or refer to REMOVAL [11/2017 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR