RM38N0EC _57 Power Source / Network _111829 NETWORKING _0499998 CAN COMMUNICATION SYSTEM(for Gasoline Model) J

NETWORKING CAN COMMUNICATION SYSTEM(for Gasoline 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(202303,202406,_57,_111829,_0499998,RM10000000291NB,202406,202409,_57,_111829,_0499998,RM100000002L89Q,202409,999999,_57,_111829,_0499998,RM100000002O6WO,)	· 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

0.333,1.583 3.229,1.854 2.896,0.271 10 false No. 8 Global CAN Junction Connector 0.052,1.583 0.49,1.802 0.438,0.219 10 false L27 1.594,0.427 2.031,0.646 0.438,0.219 10 false 2 1.583,1.083 2.021,1.302 0.438,0.219 10 false 8 5.458,0.531 5.896,0.75 0.438,0.219 10 false E37 5.458,1.198 5.896,1.417 0.438,0.219 10 false E37 5.531,0.313 5.969,0.531 0.438,0.219 10 false 2 5.521,0.958 5.958,1.177 0.438,0.219 10 false 1 0.771,2.448 2.313,2.917 1.542,0.469 10 false from Battery 2.021,2.354 2.906,2.573 0.885,0.219 10 false DC CUT 2.844,2.229 3.281,2.448 0.438,0.219 10 false 23 2.833,2.458 3.271,2.677 0.438,0.219 10 false 4D 5.49,2.479 5.927,2.698 0.438,0.219 10 false MB 5.49,4.156 5.927,4.375 0.438,0.219 10 false MB 5.49,5.438 5.927,5.656 0.438,0.219 10 false MB 5.5,2.25 5.938,2.469 0.438,0.219 10 false 26 5.5,3.917 5.938,4.135 0.438,0.219 10 false 27 5.5,5.208 5.938,5.427 0.438,0.219 10 false 13 5.854,0.438 6.292,0.656 0.438,0.219 10 false CANH 5.854,1.083 6.292,1.302 0.438,0.219 10 false CANL 5.854,2.469 6.292,2.688 0.438,0.219 10 false BECU 5.854,4.146 6.292,4.365 0.438,0.219 10 false IGR 5.844,5.438 6.281,5.656 0.438,0.219 10 false GND1 4.26,4 5.302,4.313 1.042,0.313 10 false ECU-IGR NO. 2 3.542,4.667 4.333,4.958 0.792,0.292 10 false IGR NO. 2 2.844,3.5 3.281,3.719 0.438,0.219 10 false 4H 2.833,4.406 3.271,4.625 0.438,0.219 10 false 4B 2.844,5.417 3.281,5.635 0.438,0.219 10 false 4C 2.844,6.167 3.281,6.385 0.438,0.219 10 false 4B 2.885,3.271 3.323,3.49 0.438,0.219 10 false 1 2.844,4.177 3.281,4.396 0.438,0.219 10 false 11 2.844,5.177 3.167,5.396 0.323,0.219 10 false 41 2.844,5.938 3.167,6.156 0.323,0.219 10 false 36 0.177,4.406 2,5.01 1.823,0.604 10 false from Certification ECU (Smart Key ECU Assembly) 2.729,6.99 4.948,7.479 2.219,0.49 10 false Power Distribution Box Assembly 5.438,6.99 7.083,7.583 1.646,0.594 10 false Main Body ECU (Multiplex Network Body ECU) 3.771,2.344 5.031,2.625 1.26,0.281 10 false ECU-DCC NO. 2 5.49,6.177 5.927,6.396 0.438,0.219 10 false MB 5.844,6.188 6.281,6.406 0.438,0.219 10 false GND2 5.5,5.948 5.938,6.167 0.438,0.219 10 false 14 1.229,3.5 2.875,3.99 1.646,0.49 10 false from Battery

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)>HOW TO PROCEED WITH TROUBLESHOOTING202303,999999,_57,_111829,_0499998,RM10000000291N8,

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 (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY202303,202406,_V1,_111780,_0504976,RM100000002AJR4,202406,999999,_V1,_111780,_0504976,RM100000002MNUD,

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE202203,202406,_V1,_111780,_0504976,RM1000000022CKY,202406,999999,_V1,_111780,_0504976,RM100000002MNUE,

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 CHART202111,999999,_V1,_111780,_0504976,RM100000001ZKRU,

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

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE202303,202406,_V1,_111780,_0504977,RM100000002AA1Y,202406,202409,_V1,_111780,_0504977,RM100000002MO96,202409,999999,_V1,_111780,_0504977,RM100000002OMBP,

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)>DIAGNOSIS SYSTEM202303,202406,_57,_111829,_0499998,RM10000000291NB,202406,202409,_57,_111829,_0499998,RM100000002L89Q,202409,999999,_57,_111829,_0499998,RM100000002O6WO,

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) MAIN LINE)

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

Disconnect the E37 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(E37)Location & Routingewd_type=routing;type=c;code=E37 Click Connector(E37)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E37;pinno=2,1
E37-2 (CANH) - E37-1 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(E37)Location & Routingewd_type=routing;type=c;code=E37

Click Connector(E37)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E37;pinno=2,1

E37-2 (CANH) - E37-1 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Result:

Result
OK
NG

2.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)

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

2.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)

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

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

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

1.521,0.24 1.906,0.49 0.385,0.25 2.656,0.677 2.823,0.677 2.823,0.677 2.823,1.177 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 2.271,0.625 2.76,0.771 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	Condition	Specified Condition
MB-26 (BECU) - Body ground	Always	11 to 14 V

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

Result:

Result
OK
NG

CHECK ECU POWER SOURCE CIRCUIT

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>IG Signal Circuit202111,999999,_58,_111833,_0499871,RM100000001Z0HN,

3.CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT)

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

Disconnect the 4D power distribution box assembly connector.

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

0.26,1.125 0.594,1.365 0.333,0.24 2.281,1.5 2.281,2 2.281,2 2.448,2 true 0.083,0.052 0.396,0.25 0.313,0.198 10 false *a 2.521,1.927 3.115,2.135 0.594,0.208 10 false 4D-23 0.365,1.177 0.677,1.375 0.313,0.198 10 false 4D

*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	Condition	Specified Condition
4D-23 - Body ground	Always	11 to 14 V

Result:

Result
OK
NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

REPAIR OR REPLACE HARNESS OR CONNECTOR (BECU SIGNAL CIRCUIT)