RM38T0EC _57 Power Source / Network _104409 NETWORKING _0606038 CAN COMMUNICATION SYSTEM(for HEV Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for HEV Model)  Main Body ECU Communication Stop Mode  


DESCRIPTION

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

Main body ECU (multiplex network body ECU) main line or connector

·

Power source circuit of main body ECU (multiplex network body ECU) or power distribution box assembly

·

Main body ECU (multiplex network body ECU) or power distribution box assembly ground circuit

·

Main body ECU (multiplex network body ECU) or power distribution box assembly



WIRING DIAGRAM

w/ Power Back Door


C446992E19
0.104,1.979 3.427,2.25 3.323,0.271 10 false No. 6 Global CAN Junction Connector 0.104,1.813 0.74,2.135 0.635,0.323 10 false O205 1.708,0.76 2.344,1.083 0.635,0.323 10 false 5 1.698,1.344 2.333,1.667 0.635,0.323 10 false 16 5.469,0.688 6.104,1.01 0.635,0.323 10 false 2 5.458,1.292 6.094,1.615 0.635,0.323 10 false 1 5.719,0.771 6.354,1.094 0.635,0.323 10 false CANH 5.729,1.365 6.365,1.688 0.635,0.323 10 false CANL 5.427,0.875 6.063,1.198 0.635,0.323 10 false I85 5.427,1.469 6.063,1.792 0.635,0.323 10 false I85 0.688,3.229 6.042,3.427 5.354,0.198 10 false from Auxiliary Battery 0.698,4.052 6.052,4.25 5.354,0.198 10 false from Auxiliary Battery 0.177,4.542 2.021,5.156 1.844,0.615 10 false from Certification ECU (Smart Key ECU Assembly) 2.698,3.083 3.333,3.406 0.635,0.323 10 false 23 2.74,3.896 2.917,4.073 0.177,0.177 10 false 1 2.698,4.375 2.958,4.573 0.26,0.198 10 false 10 2.698,5.479 2.958,5.677 0.26,0.198 10 false 36 2.688,6.073 2.948,6.271 0.26,0.198 10 false 41 2.698,3.25 3.333,3.573 0.635,0.323 10 false 8E 2.688,4.083 3.323,4.406 0.635,0.323 10 false 8K 2.698,4.563 3.333,4.885 0.635,0.323 10 false 8B 2.698,5.667 3.333,5.99 0.635,0.323 10 false 8B 2.688,6.25 3.323,6.573 0.635,0.323 10 false 8C 3.417,4.802 4.208,5.125 0.792,0.323 10 false IGR NO. 2 4.156,3.417 5.385,3.688 1.229,0.271 10 false ECU-DCC NO. 2 4.188,4.24 5.417,4.51 1.229,0.271 10 false ECU-IGR NO. 2 2.99,6.833 4.438,7.365 1.448,0.531 10 false Power Distribution Box Assembly 5.427,3.083 6.063,3.406 0.635,0.323 10 false 26 5.438,3.906 6.073,4.229 0.635,0.323 10 false 27 5.427,5.49 6.063,5.813 0.635,0.323 10 false 13 5.417,6.063 6.052,6.385 0.635,0.323 10 false 14 5.406,3.26 6.042,3.583 0.635,0.323 10 false MB 5.406,4.094 6.042,4.417 0.635,0.323 10 false MB 5.406,5.667 6.042,5.99 0.635,0.323 10 false MB 5.406,6.25 6.042,6.573 0.635,0.323 10 false MB 5.729,3.24 6.365,3.563 0.635,0.323 10 false BECU 5.719,4.073 6.354,4.396 0.635,0.323 10 false IGR 5.719,5.646 6.354,5.969 0.635,0.323 10 false GND1 5.729,6.229 6.365,6.552 0.635,0.323 10 false GND2 5.375,6.938 7.042,7.417 1.667,0.479 10 false Main Body ECU (Multiplex Network Body ECU)


w/o Power Back Door


C446992E20
0.104,1.979 3.427,2.25 3.323,0.271 10 false No. 4 Global CAN Junction Connector 0.104,1.813 0.74,2.135 0.635,0.323 10 false I189 1.708,0.771 2.344,1.094 0.635,0.323 10 false 5 1.698,1.344 2.333,1.667 0.635,0.323 10 false 16 5.469,0.688 6.104,1.01 0.635,0.323 10 false 2 5.458,1.292 6.094,1.615 0.635,0.323 10 false 1 5.719,0.771 6.354,1.094 0.635,0.323 10 false CANH 5.729,1.365 6.365,1.688 0.635,0.323 10 false CANL 5.427,0.875 6.063,1.198 0.635,0.323 10 false I85 5.427,1.469 6.063,1.792 0.635,0.323 10 false I85 0.688,3.229 6.042,3.427 5.354,0.198 10 false from Auxiliary Battery 0.698,4.052 6.052,4.25 5.354,0.198 10 false from Auxiliary Battery 0.177,4.542 2.021,5.156 1.844,0.615 10 false from Certification ECU (Smart Key ECU Assembly) 2.698,3.083 3.333,3.406 0.635,0.323 10 false 23 2.74,3.896 2.917,4.073 0.177,0.177 10 false 1 2.698,4.375 2.958,4.573 0.26,0.198 10 false 10 2.698,5.479 2.958,5.677 0.26,0.198 10 false 36 2.688,6.073 2.948,6.271 0.26,0.198 10 false 41 2.698,3.25 3.333,3.573 0.635,0.323 10 false 8E 2.688,4.083 3.323,4.406 0.635,0.323 10 false 8K 2.698,4.563 3.333,4.885 0.635,0.323 10 false 8B 2.698,5.667 3.333,5.99 0.635,0.323 10 false 8B 2.688,6.25 3.323,6.573 0.635,0.323 10 false 8C 3.417,4.802 4.208,5.125 0.792,0.323 10 false IGR NO. 2 4.156,3.417 5.385,3.688 1.229,0.271 10 false ECU-DCC NO. 2 4.188,4.24 5.417,4.51 1.229,0.271 10 false ECU-IGR NO. 2 2.99,6.833 4.438,7.365 1.448,0.531 10 false Power Distribution Box Assembly 5.427,3.083 6.063,3.406 0.635,0.323 10 false 26 5.438,3.906 6.073,4.229 0.635,0.323 10 false 27 5.427,5.49 6.063,5.813 0.635,0.323 10 false 13 5.417,6.063 6.052,6.385 0.635,0.323 10 false 14 5.406,3.26 6.042,3.583 0.635,0.323 10 false MB 5.406,4.094 6.042,4.417 0.635,0.323 10 false MB 5.406,5.667 6.042,5.99 0.635,0.323 10 false MB 5.406,6.25 6.042,6.573 0.635,0.323 10 false MB 5.729,3.24 6.365,3.563 0.635,0.323 10 false BECU 5.719,4.073 6.354,4.396 0.635,0.323 10 false IGR 5.719,5.646 6.354,5.969 0.635,0.323 10 false GND1 5.729,6.229 6.365,6.552 0.635,0.323 10 false GND2 5.375,6.938 7.042,7.417 1.667,0.479 10 false Main Body ECU (Multiplex Network Body ECU)


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 HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

·

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 minute 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

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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

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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 HEV Model)>DIAGNOSIS SYSTEM

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

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Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.



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 FOR OPEN IN CAN BUS LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) MAIN LINE)
a.

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


b.

Disconnect the main body ECU (multiplex network body ECU) connector.


c.
C369119C65
1.583,0.167 2,0.417 0.417,0.25 0.969,1.531 1.302,0.885 true 0.729,1.542 0.479,0.865 true 0.094,0.104 0.406,0.302 0.313,0.198 10 false *a 1.688,0.208 2.125,0.375 0.438,0.167 10 false I85 1.313,0.74 1.792,0.948 0.479,0.208 10 false CANH 0.073,0.74 0.552,0.948 0.479,0.208 10 false CANL
*a Front view of wire harness connector
(to Main Body ECU (Multiplex Network Body ECU))


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

Standard Resistance:
Tester Connection Condition Specified Condition
I85-2 (CANH) - I85-1 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

2.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)
a.

Remove the main body ECU (multiplex network body ECU).

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


b.

Reconnect the cable to the negative (-) auxiliary battery terminal.


c.
C434125C44
1.521,0.24 1.906,0.49 0.385,0.25 2.594,1.583 2.813,1.229 true 0.146,0.115 0.458,0.313 0.313,0.198 10 false *1 1.604,0.302 1.917,0.5 0.313,0.198 10 false MB 2.229,1.604 2.719,1.75 0.49,0.146 10 false BECU
*1 Power Distribution Box Assembly


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
MB-26 (BECU) - Body ground Ignition switch off 11 to 14 V


NOTICE:

Perform this inspection with the wire harness connected to the power distribution box assembly.



Result:
Proceed to
OK
NG



OK

CHECK ECU POWER SOURCE CIRCUIT

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>IG Signal Circuit


NG

3.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)
3.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)
a.

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


b.

Disconnect the power distribution box assembly connector.


c.

Reconnect the cable to the negative (-) auxiliary battery terminal.


d.
C436481C15
0.26,1.125 0.594,1.365 0.333,0.24 2.75,1.99 2.302,1.5 true 0.083,0.052 0.396,0.25 0.313,0.198 10 false *a 2.813,1.917 3.281,2.115 0.469,0.198 10 false 8E-23 0.365,1.177 0.677,1.375 0.313,0.198 10 false 8E
*a Front view of wire harness connector
(to Power Distribution Box Assembly)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
8E-23 - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BECU SIGNAL CIRCUIT)