DTC B2782-11: Power Source Control System Circuit Short to Ground [07/2020 - 12/2021]: Procedure

1. Perform the DTC output confirmation operation.
2. Check if DTC B2785-88 is output.

   Body Electrical > Smart Key > Trouble Codes 

   Result

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

Result: 

B 

GO TO LIN COMMUNICATION SYSTEM (DTC B2785-88). Refer to  DTC B2785-88: Communication between ECUs connected by LIN Bus off [07/2020 - 12/2021] 

Result: 

A 

See step  2

1. Disconnect the E54 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E54-1 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Connect the E54 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))
   *b	Steering lock motor not operating
   *c	Steering lock motor operating

2. Check the signal waveform according to the condition(s) in the table below.
   MEASUREMENT CONDITION
   
   

   Item	Content
   Tester Connection	E54-3 (IGE) - E54-1 (GND)
   Tool Setting	2 V/DIV., 200 ms./DIV.
   Condition	Steering lock motor operating when all conditions met, and then door opened: Shift lever in P Steering unlocked Ignition switch turned off

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  4

1. Clear the DTCs.

   Body Electrical > Smart Key > Clear DTCs 

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

   After turning the ignition switch off, waiting time may be required before disconnecting the cable from the auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notices before proceeding with work.

   Refer to PRECAUTION [07/2020 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Perform the DTC output confirmation operation.
2. Check if DTC B2782-11 is output.

   Body Electrical > Smart Key > Trouble Codes 

   Result

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

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 OR UPPER BRACKET ASSEMBLY). Refer to  DISASSEMBLY [07/2020 - 12/2021] 

1. Disconnect the E54 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
2. Disconnect the E52 certification ECU (smart key ECU assembly) connector.
3. Check for deformation and corrosion of the connector case and terminals.

   OK

   There is no deformation or corrosion of the connector case or terminals.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E54-3 (IGE) - E52-24 (SLR+)	Always	Below 1 Ω
   E54-3 (IGE) or E52-24 (SLR+) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR