RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694853 CAN COMMUNICATION SYSTEM(for SFTM Made HV Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for SFTM Made HV Model)  Bus Buffer ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Bus Buffer ECU Communication Stop Mode Communication stop for "Accessory Gateway" is indicated on the "Communication Bus Check" screen of the GTS.
(Click here)
·

Bus buffer ECU branch wire or connector

·

Bus buffer ECU



WIRING DIAGRAM

C436466E72
0.25,2.563 2.229,3.135 1.979,0.573 10 false Central Gateway ECU (Network Gateway ECU) 4.219,2.688 5.406,3.042 1.188,0.354 10 false Bus Buffer ECU 5.458,2.646 6.531,3.375 1.073,0.729 10 false CAN Compatible Optional Devices 4.219,2.5 4.823,2.771 0.604,0.271 10 false G175 4.479,1.531 4.99,1.708 0.51,0.177 10 false CAN+ 4.479,2.052 4.99,2.229 0.51,0.177 10 false CAN- 4.271,1.438 4.458,1.604 0.188,0.167 10 false 2 4.281,1.948 4.469,2.115 0.188,0.167 10 false 1 1.99,1.448 2.198,1.635 0.208,0.188 10 false 5 2.01,1.948 2.323,2.146 0.313,0.198 10 false 6 0.26,2.396 0.667,2.615 0.406,0.219 10 false G174 1.479,1.406 2,1.625 0.521,0.219 10 false CA8H 1.469,2.177 1.99,2.396 0.521,0.219 10 false CA8L

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.


NOTICE:
·

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for SFTM Made HV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 10 minutes or more before measuring the resistance.

·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the auxiliary battery.

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART


·

Some parts must be initialized and set when replacing or removing and installing parts.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE

·

After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

DTC check procedure: Turn the ignition switch to ON 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.

·

After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for SFTM Made HV Model)>DIAGNOSIS SYSTEM



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

1.CHECK OPTIONS
a.

Check whether dealer installed options that support CAN communication are installed.


Result:
Result Proceed to
Installed A
Not installed B



A

2.CHECK FOR OPEN IN CAN BUS WIRE (BUS BUFFER ECU BRANCH WIRE)

B

3.CHECK FOR OPEN IN CAN BUS WIRE (OPTION CONNECTOR [BUS BUFFER ECU] BRANCH WIRE)
2.CHECK FOR OPEN IN CAN BUS WIRE (BUS BUFFER ECU BRANCH WIRE)
a.

Disconnect the cable from the negative (-) auxiliary battery terminal.


b.
C435214C05
1.458,0.146 1.948,0.406 0.49,0.26 0.104,0.125 0.417,0.323 0.313,0.198 10 false *a 1.542,0.198 2.063,0.594 0.521,0.396 10 false G175
*a Front view of wire harness connector
(to Bus Buffer ECU)


Disconnect the bus buffer ECU.*

*: When a dealer-installed option is installed


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
G175-2 (CAN+) - G175-1 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω



Result:
Proceed to
OK
NG



OK

CHECK DEALER-INSTALLED OPTION

NG

REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR

3.CHECK FOR OPEN IN CAN BUS WIRE (OPTION CONNECTOR [BUS BUFFER ECU] BRANCH WIRE)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.

*: When a dealer-installed option is installed


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Central Gateway / Utility / Initialization.

Body Electrical > Central Gateway > Utility
Tester Display
Initialization
50005 443 4581

e.

Enter the following menus: Body Electrical / Main Body / Utility / Initialization.

Body Electrical > Main Body > Utility
Tester Display
Initialization
50005 449 4581

f.

Enter the following menus: Body Electrical / Main Body / Clear DTCs.

Body Electrical > Main Body > Clear DTCs
50002 449

g.

Enter the following menus: Body Electrical / Main Body / Trouble Codes.

Body Electrical > Main Body > Trouble Codes
50001 449

Result:
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)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL