Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CY51 |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 09/2022] |
Title: NETWORKING: LIN COMMUNICATION SYSTEM (for Gasoline Model): B2789; No Response from ID BOX; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] |
DTC
|
B2789
|
No Response from ID BOX
|
DESCRIPTION
This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
B2789
|
No Response from ID BOX
|
No communication between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) for 10 seconds or more.
|
-
ID code box (immobiliser code ECU)
-
Certification ECU (smart key ECU assembly)
-
Wire harness or connector
-
ECU-B NO. 1 fuse
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
1.
|
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ID CODE BOX (IMMOBILISER CODE ECU))
|
(a) Disconnect the I1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I20 ID code box (immobiliser code ECU) 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) - I20-2 (LIN1)
|
Engine switch off
|
Below 1 Ω
|
I1-14 (LIN) or I20-2 (LIN1) - Body ground
|
Engine switch off
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - BATTERY, BODY GROUND)
|
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I20-1 (+B) - I20-5 (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
|
I20-5 (GND) - Body ground
|
Always
|
Below 1 Ω
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
3.
|
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
|
(a) Replace the ID code box (immobiliser code ECU).
Click here
NEXT
|
|
|
4.
|
REGISTER ECU CODE REGISTRATION
|
(a) Register the recognition codes in the ECUs.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Click here
Body Electrical > Smart Key > Clear DTCs
(b) Recheck for DTCs.
Body Electrical > Smart Key > Trouble Codes
OK:
DTC B2789 is not output.
OK |
|
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)
|
|