DESCRIPTION
Detection Item | Symptom | Trouble Area |
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Bus Buffer ECU Communication Stop Mode | Any of the following conditions are met:
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
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DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
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HINT:
PROCEDURE
1. | CHECK OPTIONS |
(a) Check whether dealer installed options that support CAN communication are installed.
Result | Proceed to |
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Installed | A |
Not installed | B |
B | GO TO STEP 4 |
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2. | CHECK FOR OPEN IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU) BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the G80 option connector (bus buffer ECU).
HINT:
Disconnect any CAN compatible optional devices from the option connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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NG | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU)) |
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3. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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(b) Reconnect the cable from the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
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G80-3 (R+B) - Body ground | Always | 11 to 14 V |
OK | REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICE |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
4. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Utility / Initialization.
Body Electrical > Main Body > Utility Tester Display |
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Initialization |
(e) Enter the following menus: Body Electrical / Central Gateway / Utility / Initialization.
Body Electrical > Central Gateway > Utility Tester Display |
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Initialization |
(f) Enter the following menus: Body Electrical / Main Body / Clear DTCs.
Body Electrical > Main Body > Clear DTCs(g) Enter the following menus: Body Electrical / Main Body / Trouble Codes.
Body Electrical > Main Body > Trouble Codes Result | Proceed to |
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DTC U1117 is not output from main body ECU (multiplex network body ECU) | A |
DTC U1117 is output from main body ECU (multiplex network body ECU) | B |
A | END |
B | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |