DESCRIPTION
This DTC is stored when LIN communication between the certification ECU and ID code box stops for 10 seconds or more.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2789 |
No communication between the certification ECU and ID code box for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
HINT:
When communication between the ID code box and certification ECU stops, DTC B2785 is also stored.
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2789 is not output.
OK |
USE SIMULATION METHOD TO CHECK |
|
3. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ID CODE BOX) |
(a) Disconnect the F79 certification ECU connector.
(b) Disconnect the F72 ID code box connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F79-29 (LIN) - F72-3 (LIN1) |
Always |
Below 1 Ω |
F79-29 (LIN) or F72-3 (LIN1) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (ID CODE BOX - BATTERY AND BODY GROUND) |
(a) Disconnect the F72 ID code box connector. |
|
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F72-8 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F72-1 (+B) - Body ground |
Always |
11 to 14 V |
*a |
Front view of wire harness connector (to ID Code Box) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
REPLACE ID CODE BOX |
(a) Temporarily replace the ID code box with a new one (See page ).
|
6. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
7. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2789 is not output.
OK |
END (ID CODE BOX IS DEFECTIVE) |
NG |
REPLACE CERTIFICATION ECU |
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. INSTALL FRONT DISC
(a) Align the matchmarks and install the front disc.
HINT:
When ...
Combination Meter
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-)
battery termin ...