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

NETWORKING  CAN COMMUNICATION SYSTEM(for Gasoline Model)  4WD Control ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
4WD Control ECU Communication Stop Mode Communication stop for "Four Wheel Drive Control" is indicated on "CAN Bus Check" screen of the GTS.
Click here(Click here)
·

4WD ECU assembly branch line or connector

·

Power source circuit of 4WD ECU assembly

·

4WD ECU assembly ground circuit

·

4WD ECU assembly



WIRING DIAGRAM

C437653E08
5.479,4.052 7.104,4.313 1.625,0.26 10 false 4WD ECU Assembly 5.594,3.094 6.031,3.333 0.438,0.24 10 false GND 5.604,2.479 5.969,2.729 0.365,0.25 10 false IG1 5.594,1.458 6.063,1.813 0.469,0.354 10 false CANL 5.594,0.865 6.073,1.177 0.479,0.313 10 false CANH 5.292,0.719 5.552,0.938 0.26,0.219 10 false 6 3.656,2.313 5.052,2.542 1.396,0.229 10 false ECU-IGR NO. 3 1.615,2.469 3.188,2.781 1.573,0.313 10 false from IGR NO. 1 Relay 1.646,1.354 1.865,1.594 0.219,0.24 10 false 12 1.677,0.729 1.938,0.958 0.26,0.229 10 false 1 0.052,1.813 0.427,2.167 0.375,0.354 10 false L51 0.365,1.813 3.177,2.167 2.813,0.354 10 false No. 10 Global CAN Junction Connector 5.135,4.052 5.479,4.323 0.344,0.271 10 false L48 5.292,1.313 5.688,1.531 0.396,0.219 10 false 5 5.313,2.333 5.708,2.552 0.396,0.219 10 false 3 5.323,2.948 5.719,3.167 0.396,0.219 10 false 4

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 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 (-) battery terminal.

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

·

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

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)>DIAGNOSIS SYSTEM

·

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



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 (4WD ECU ASSEMBLY BRANCH LINE)
a.

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


b.

Disconnect the L48 4WD ECU assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(L48)Location & Routing

Click Connector(L48)Body>No. 2 Floor Wire>4WD ECU Assembly

L48-6 (CANH) - L48-5 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (4WD ECU ASSEMBLY)

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

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(L48)Location & Routing

Click Connector(L48)Body>No. 2 Floor Wire>4WD ECU Assembly

L48-4 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



b.

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


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(L48)Location & Routing

Click Connector(L48)Body>No. 2 Floor Wire>4WD ECU Assembly

L48-3 (IG1) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE 4WD ECU ASSEMBLY

Click hereDrivetrain>GF1A (TRANSFER / 4WD / AWD)>4WD CONTROL ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)