RM3660EC _57 Power Source / Network _080743 NETWORKING _0598517 CAN COMMUNICATION SYSTEM(for Gasoline Model (NR Series)) J

NETWORKING  CAN COMMUNICATION SYSTEM(for Gasoline Model (NR Series))  Main Body ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Main Body ECU Communication Stop Mode Any of the following conditions are met:
·

Communication stop for "Main Body" is indicated on the "Communication Bus Check" screen of the GTS.

Click here(Click here)

·

Communication stop history for "Main Body" is indicated on the "Communication Bus Check (Detail)" screen of the GTS. (The Lost Communication Time value for "Main Body" is 6 or more.)

Click here(Click here)

·

Communication system DTCs (DTCs that start with U) that correspond to "Main Body ECU Communication Stop Mode" in "DTC Combination Table" are output.

Click here(Click here)


·

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

·

Power source circuit of main body ECU (multiplex network body ECU) or driver side junction block assembly

·

Main body ECU (multiplex network body ECU) or driver side junction block assembly ground circuit

·

Main body ECU (multiplex network body ECU) or driver side junction block assembly



WIRING DIAGRAM

C416231E06
0.542,1.563 2.917,1.927 2.375,0.365 10 false No. 3 CAN Junction Connector 5.531,0.302 5.99,0.5 0.458,0.198 10 false 5 5.49,0.531 5.948,0.729 0.458,0.198 10 false I85 5.531,0.948 5.99,1.146 0.458,0.198 10 false 4 5.49,1.198 5.948,1.396 0.458,0.198 10 false I85 5.833,0.531 6.292,0.729 0.458,0.198 10 false CANH 5.844,1.208 6.302,1.406 0.458,0.198 10 false CANL 5.833,2.479 6.292,2.677 0.458,0.198 10 false BECU 5.458,2.469 5.917,2.667 0.458,0.198 10 false MB 5.49,2.229 5.948,2.427 0.458,0.198 10 false 31 5.469,3.531 5.927,3.729 0.458,0.198 10 false MB 5.49,3.302 5.948,3.5 0.458,0.198 10 false 30 5.833,3.531 6.292,3.729 0.458,0.198 10 false ACC 4.49,3.396 5.26,3.74 0.771,0.344 10 false ECU-ACC 5.479,4.875 5.938,5.073 0.458,0.198 10 false MB 5.5,4.656 5.958,4.854 0.458,0.198 10 false 32 5.844,4.865 6.302,5.063 0.458,0.198 10 false IG 4.406,4.75 5.844,5.271 1.438,0.521 10 false ECU-IG1 NO. 4 3.698,4.052 4.198,4.354 0.5,0.302 10 false ACC 3.51,5.406 4.458,5.708 0.948,0.302 10 false IG1-NO. 1 5.458,5.948 5.917,6.146 0.458,0.198 10 false MB 5.5,5.719 5.958,5.917 0.458,0.198 10 false 11 5.844,5.948 6.302,6.146 0.458,0.198 10 false GND1 5.417,6.99 7.094,7.427 1.677,0.438 10 false Main Body ECU (Multiplex Network Body ECU) 2.719,7 5.135,7.406 2.417,0.406 10 false Driver Side Junction Block Assembly 2.833,5.948 3.292,6.146 0.458,0.198 10 false 4F 2.875,5.708 3.333,5.906 0.458,0.198 10 false 3 2.833,5.135 3.292,5.333 0.458,0.198 10 false 4E 2.854,4.896 3.313,5.094 0.458,0.198 10 false 17 2.833,3.792 3.292,3.99 0.458,0.198 10 false 4E 2.844,3.583 3.302,3.781 0.458,0.198 10 false 30 2.854,3.073 3.313,3.271 0.458,0.198 10 false 4D 2.896,2.833 3.354,3.031 0.458,0.198 10 false 1 2.844,2.469 3.302,2.667 0.458,0.198 10 false 4B 2.885,2.208 3.344,2.406 0.458,0.198 10 false 1 0.76,2.448 1.729,2.729 0.969,0.281 10 false from Battery 1.198,3.063 2.177,3.427 0.979,0.365 10 false from Battery 0.104,3.813 1.938,4.5 1.833,0.688 10 false from Certification ECU (Smart Key ECU Assembly) 0.125,5.156 1.958,5.844 1.833,0.688 10 false from Certification ECU (Smart Key ECU Assembly) 0.188,1.563 0.646,1.76 0.458,0.198 10 false I125 3.844,2.323 4.979,2.604 1.135,0.281 10 false ECU-DCC NO. 2 1.979,2.333 2.635,2.573 0.656,0.24 10 false D/C CUT 1.615,1.031 2.073,1.229 0.458,0.198 10 false 14 1.656,0.365 2.115,0.563 0.458,0.198 10 false 3

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 Gasoline Model (NR Series))>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 (-) 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 battery.

HINT:

When disconnecting and reconnecting the 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 Gasoline Model (NR Series))>DIAGNOSIS SYSTEM

·

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

·

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) BRANCH LINE)
a.

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


b.

Disconnect the I85 main body ECU (multiplex network body ECU) connector.


c.
C369119C31
1.583,0.167 2.021,0.417 0.438,0.25 2.375,0.865 2.542,0.865 2.542,0.865 2.542,1.531 true 2.531,0.688 2.698,0.688 2.698,0.688 2.698,1.521 true 0.094,0.104 0.406,0.302 0.313,0.198 10 false *a 1.719,0.208 2.031,0.406 0.313,0.198 10 false I85 2.094,0.615 2.573,0.823 0.479,0.208 10 false CANH 1.958,0.792 2.438,1 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
I85-5 (CANH) - I85-4 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω



Result:
Result
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

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

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.

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

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


b.
C227508C30
1.531,0.552 1.917,0.792 0.385,0.24 3,1.073 2.76,0.438 2.76,0.438 2.646,0.438 true 3.094,1.115 3.01,1.594 3.01,1.594 2.875,1.594 true 2.917,1.083 2.74,0.771 2.74,0.771 2.625,0.771 true 1.219,1.083 1.135,0.771 1.135,0.771 1.021,0.771 true 0.052,0.052 0.365,0.208 0.313,0.156 10 false *a 1.615,0.583 1.927,0.74 0.313,0.156 10 false MB 2.188,0.375 2.625,0.552 0.438,0.177 10 false BECU 2.25,0.719 2.688,0.896 0.438,0.177 10 false ACC 2.677,1.531 3.115,1.708 0.438,0.177 10 false IG 0.552,0.698 0.99,0.875 0.438,0.177 10 false GND1
*a Component without harness connected
(to Driver Side Junction Block Assembly)


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

Standard Resistance:
Tester Connection Condition Specified Condition
MB-11 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω


NOTICE:

Perform this inspection with the wire harness connected to the driver side junction block assembly.



c.

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


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
MB-31 (BECU) - Body ground Always 11 to 14 V
MB-30 (ACC) - Body ground Ignition switch ACC 11 to 14 V
MB-32 (IG) - Body ground Ignition switch ON 11 to 14 V


NOTICE:

Perform this inspection with the wire harness connected to the driver side junction block assembly.



Result:
Result Proceed to
OK A
NG (BECU) B
NG (ACC) C
NG (IG) D
NG (GND1) E



A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


B

3.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)

C

GO TO LIGHTING (INT) SYSTEM (ACC SIGNAL CIRCUIT)

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM (for NR Series Engine)>ACC Signal Circuit


D

GO TO LIGHTING (INT) SYSTEM (IG SIGNAL CIRCUIT)

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM (for NR Series Engine)>IG Signal Circuit


E

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

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


b.

Disconnect the 4B driver side junction block assembly connector.


c.

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


d.
C352870C25
1.458,0.135 1.781,0.365 0.323,0.229 0.719,0.917 0.719,0.354 0.719,0.354 0.854,0.354 true 0.083,0.063 0.396,0.26 0.313,0.198 10 false *a 1.552,0.167 1.865,0.365 0.313,0.198 10 false 4B 0.958,0.292 1.51,0.531 0.552,0.24 10 false 4B-1
*a Front view of wire harness connector
(to Driver Side Junction Block Assembly)


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

Standard Voltage:
Tester Connection Condition Specified Condition
4B-1 - Body ground Always 11 to 14 V



Result:
Result
OK
NG



OK

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BECU SIGNAL CIRCUIT)

4.CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)
a.

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


b.

Disconnect the 4F driver side junction block assembly connector.


c.
C352871C61
1.177,0.146 1.51,0.385 0.333,0.24 1.75,0.896 1.75,0.313 1.75,0.313 1.896,0.313 true 0.083,0.052 0.396,0.25 0.313,0.198 10 false *a 1.969,0.229 2.5,0.49 0.531,0.26 10 false 4F-3 1.292,0.188 1.604,0.385 0.313,0.198 10 false 4F
*a Front view of wire harness connector
(to Driver Side Junction Block Assembly)


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

Standard Resistance:
Tester Connection Condition Specified Condition
4F-3 - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



Result:
Result
OK
NG



OK

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)