RM35X0E _57 Power Source / Network _078518 NETWORKING _0381088 CAN COMMUNICATION SYSTEM J

NETWORKING  CAN COMMUNICATION SYSTEM  Headlight ECU RH Communication Stop Mode  


DESCRIPTION

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

Headlight ECU sub-assembly RH branch wire or connector

·

Power source circuit of headlight ECU sub-assembly RH

·

Headlight ECU sub-assembly RH ground circuit

·

Headlight ECU sub-assembly RH



WIRING DIAGRAM

C348701E53
0.229,1.958 2.563,2.271 2.333,0.313 10 false No. 6 CAN Junction Connector 0.229,1.76 0.625,1.969 0.396,0.208 10 false N126 1.719,1.469 2.115,1.677 0.396,0.208 10 false 20 1.719,0.885 2.115,1.094 0.396,0.208 10 false 10 5.323,0.865 5.719,1.073 0.396,0.208 10 false 24 5.323,1.427 5.719,1.635 0.396,0.208 10 false 23 5.688,1 6.083,1.208 0.396,0.208 10 false CANH 5.688,1.583 6.083,1.792 0.396,0.208 10 false CANL 5.323,2.354 5.719,2.563 0.396,0.208 10 false 13 5.688,2.49 6.083,2.698 0.396,0.208 10 false ECUB 5.385,3.177 5.781,3.385 0.396,0.208 10 false 4 5.677,3.313 6.073,3.521 0.396,0.208 10 false IG 5.344,4 5.74,4.208 0.396,0.208 10 false 12 5.677,4.135 6.073,4.344 0.396,0.208 10 false GND 5.458,4.75 5.854,4.958 0.396,0.208 10 false A55 5.469,4.948 6.875,5.302 1.406,0.354 10 false Headlight ECU Sub-assembly RH 3.927,3.167 5.156,3.427 1.229,0.26 10 false ECU-IG1 NO.3 1.802,2.458 3.49,2.927 1.688,0.469 10 false from H-LP RH Relay 1.771,3.281 3.219,3.573 1.448,0.292 10 false from IG1 NO.1 Relay

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>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 (-) 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>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 FOR OPEN IN CAN BUS WIRE (HEADLIGHT ECU SUB-ASSEMBLY RH BRANCH WIRE)
a.

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


b.
C349837C55
1.479,0.448 1.917,0.719 0.438,0.271 2.385,2.74 2.552,2.74 2.552,2.74 2.552,2.083 true 2.5,2.969 2.667,2.969 2.667,2.969 2.667,2.083 true 0.104,0.104 0.417,0.302 0.313,0.198 10 false *a 1.563,0.5 1.917,0.729 0.354,0.229 10 false A55 2.104,2.917 2.552,3.167 0.448,0.25 10 false CANH 1.979,2.677 2.427,2.927 0.448,0.25 10 false CANL
*a Front view of wire harness connector
(to Headlight ECU Sub-assembly RH)


Disconnect the A55 headlight ECU sub-assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A55-24 (CANH) - A55-23 (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 WIRE OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.
C349837C53
1.479,0.448 1.917,0.719 0.438,0.271 0.677,2.75 0.844,2.75 0.844,2.75 0.844,2.094 true 1.823,1.906 1.823,1.052 1.823,1.052 1.99,1.052 true 0.104,0.104 0.417,0.302 0.313,0.198 10 false *a 1.563,0.5 1.917,0.729 0.354,0.229 10 false A55 0.365,2.698 0.813,2.948 0.448,0.25 10 false GND 2.073,1 2.521,1.25 0.448,0.25 10 false IG
*a Front view of wire harness connector
(to Headlight ECU Sub-assembly RH)


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

Standard Resistance:
Tester Connection Condition Specified Condition
A55-12 (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 Switch Condition Specified Condition
A55-4 (IG) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.
C349837C54
1.479,0.448 1.917,0.719 0.438,0.271 1.01,2.75 1.177,2.75 1.177,2.75 1.177,2.094 true 0.104,0.104 0.417,0.302 0.313,0.198 10 false *a 1.583,0.521 1.938,0.75 0.354,0.229 10 false A55 0.604,2.677 1.052,2.927 0.448,0.25 10 false ECUB
*a Front view of wire harness connector
(to Headlight ECU Sub-assembly RH)


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

Standard Voltage:
Tester Connection Condition Specified Condition
A55-13 (ECUB) - Body ground For approximately 15 seconds after the ignition switch is turned ON or off 11 to 14 V
Approximately 15 seconds elapsed after turning the ignition switch off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ECU>REMOVAL


NG

GO TO LIGHTING SYSTEM

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>HOW TO PROCEED WITH TROUBLESHOOTING