DTC B2782-11: Power Source Control System Circuit Short to Ground [12/2021 - ]: Procedure

Pre-procedure1

• Perform the DTC output confirmation operation.

• Check if DTC B2785-88 is output.

  Body Electrical > Smart Access > Trouble Codes 

  Result

  Result	Proceed to
  B2785-88 is not output	A
  B2785-88 is output	B

Post-procedure1

• None

Result: 

B 

GO TO LIN COMMUNICATION SYSTEM (DTC B2785-88). Refer to  DTC B2785-88: Communication between ECUs connected by LIN Bus off [12/2021 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Disconnect the I49 steering lock ECU (steering lock actuator with ECU assembly) connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition
  I49-1 (GND) - Body ground	Always	Below 1 Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Pre-procedure1

• Connect the I49 steering lock ECU (steering lock actuator with ECU assembly) connector.

• Check the signal waveform according to the condition(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator with ECU Assembly))
  *b	Waveform
  *c	Steering lock motor not operating
  *d	Steering lock motor operating

  Tester Connection	Condition	Tool Setting	Specified Condition
  I49-3 (IGE) - I49-1 (GND)	Steering lock motor operating when all conditions met, and then door opened: Shift lever in P Steering unlocked Ignition switch turned off	2 V/DIV., 200 ms./DIV.	Pulse generation (See waveform)

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  7

Result: 

OK 

See step  4

1. Clear the DTCs.

   Body Electrical > Smart Access > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Disconnect the cable from the negative (-) battery terminal, wait for 30 seconds or more, and then reconnect the cable to the negative (-) battery terminal to clear the record of malfunctions stored in the Data List.
   NOTE:

   • After the ignition is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

     Refer to BEFORE DISCONNECTING BATTERY [12/2021 - ]

   • When disconnecting and reconnecting the battery

     HINT: 

     When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

     Refer to AUTOMATIC LEARNING CHART [12/2021 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

Pre-procedure1

• Perform the DTC output confirmation operation.

• Check if DTC B2782-11 is output.

  Body Electrical > Smart Access > Trouble Codes 

  Result

  Result	Proceed to
  B2782-11 is not output	A
  B2782-11 is output	B

Post-procedure1

• None

Result: 

A 

SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR) 

Result: 

B 

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY). Refer to  DISASSEMBLY [12/2021 - ] 

Pre-procedure1

• Disconnect the I49 steering lock ECU (steering lock actuator with ECU assembly) connector.
• Disconnect the I39 certification ECU (smart key ECU assembly) connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition
  I49-3 (IGE) - I39-24 (SLR+)	Always	Below 1 Ω
  I49-3 (IGE) or I39-24 (SLR+) - Other terminals and body ground	Always	10 kΩ or higher

  NOTE:

  Check for deformation and corrosion of the connector case and terminals.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR