Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CY5A |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 09/2022] |
Title: NETWORKING: LIN COMMUNICATION SYSTEM (for Gasoline Model): B2786; No Response from Steering Lock ECU; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] |
DTC
|
B2786
|
No Response from Steering Lock ECU
|
DESCRIPTION
This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upper bracket assembly) stops for 10 seconds or more.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
B2786
|
No Response from Steering Lock ECU
|
No communication between steering lock ECU (steering lock actuator or upper bracket assembly) and certification ECU (smart key ECU assembly) for 10 seconds or more.
|
-
Certification ECU (smart key ECU assembly)
-
Steering lock ECU (steering lock actuator or upper bracket assembly)
-
Wire harness or connector
-
STRG LOCK fuse
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
1.
|
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY))
|
(a) Disconnect the I1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I1-14 (LIN) - I59-5 (LIN)
|
Engine switch off
|
Below 1 Ω
|
I1-14 (LIN) or I59-5 (LIN) - Body ground
|
Engine switch off
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - BATTERY, BODY GROUND)
|
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I59-7 (B) - I59-1 (GND)
|
Always
|
11 to 14 V
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I59-1 (GND) - Body ground
|
Always
|
Below 1 Ω
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
3.
|
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
|
(a) Replace the steering lock ECU (steering lock actuator or upper bracket assembly).
Click here
NEXT
|
|
|
4.
|
REGISTER ECU CODE REGISTRATION
|
(a) Register the recognition codes in the ECUs.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
(b) Recheck for DTCs.
Body Electrical > Smart Key > Trouble Codes
OK:
DTC B2786 is not output.
OK |
|
END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)
|
|