Toyota Yaris: Can Communication System / Bus Buffer ECU Communication Stop Mode
DESCRIPTION
Detection Item | Symptom | Trouble Area |
Bus Buffer ECU Communication Stop Mode | Communication stop for "Remote Engine Starter" is indicated on the "Communication Bus Check" screen of the GTS. Click here
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Option connector (bus buffer ECU) main line or connector
-
CAN compatible optional device
-
Main body ECU (multiplex network body ECU)
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
-
Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
-
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
(a) Check whether dealer installed options that support CAN communication are installed.
Result | Proceed to |
Installed | A |
Not installed | B |
B |
| GO TO STEP 3 |
A |
| |
2. | CHECK FOR OPEN IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU) MAIN LINE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal. |
| *a | Front view of wire harness connector (to Option Connector) | | |
(b) Disconnect the option connector (bus buffer ECU).
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
H62-2 (CAN+) - H62-1 (CAN-) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
OK |
| REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICE |
NG |
| REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU)) |
(a) Initialize the ECU.
Body Electrical > Central Gateway > Utility
Tester Display |
Initialization |
Body Electrical > Main Body > Utility
Tester Display |
Initialization |
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) Read the DTCs.
Body Electrical > Main Body > Trouble Codes
Result | Proceed to |
DTC U111787 is not output from main body ECU (multiplex network body ECU) | A |
DTC U111787 is output from main body ECU (multiplex network body ECU) | B |
A |
| END |
B |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
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Other information:
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Categories
Before refueling, close all the doors, windows, and the liftgate/trunk
lid, and switch the ignition OFF.
To open the fuel-filler lid, pull
the remote fuel-filler lid release.
To remove the fuel-filler cap, turn it counterclockwise.
Attach the removed cap to the
inner side of the fuel-filler lid.
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