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))  Open in Bus 3 Main Bus Line  


DESCRIPTION

There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.

Symptom Trouble Area
Resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
·

CAN main bus lines or connector

·

Central gateway ECU (network gateway ECU)

·

No. 6 CAN junction connector



This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.

WIRING DIAGRAM

C371237E14
0.969,1.323 1.563,1.563 0.594,0.24 10 false 120 Ω 0.906,3.771 1.5,4.01 0.594,0.24 10 false 120 Ω 1.573,0.99 2.167,1.229 0.594,0.24 10 false CA3H 1.583,1.479 2.177,1.719 0.594,0.24 10 false CA3L 2.052,0.979 2.396,1.208 0.344,0.229 10 false 6 2.063,1.469 2.406,1.698 0.344,0.229 10 false 21 1.542,3.427 2.135,3.667 0.594,0.24 10 false CAYH 1.583,3.906 2.177,4.146 0.594,0.24 10 false CAYL 0.375,4.427 0.729,4.667 0.354,0.24 10 false I53 0.625,4.427 3.635,4.771 3.01,0.344 10 false Central Gateway ECU (Network Gateway ECU) 4.688,4.385 5.167,4.656 0.479,0.271 10 false I132 5.01,4.385 6.917,4.76 1.906,0.375 10 false No. 6 CAN Junction Connector 2.042,3.417 2.385,3.646 0.344,0.229 10 false 19 2.083,3.906 2.427,4.135 0.344,0.229 10 false 20 5.344,0.969 5.688,1.198 0.344,0.229 10 false 2 5.281,1.427 5.625,1.656 0.344,0.229 10 false 13 5.344,3.406 5.688,3.635 0.344,0.229 10 false 1 5.281,3.875 5.625,4.104 0.344,0.229 10 false 12

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



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 MAIN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR)
a.

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


b.

Disconnect the I132 No. 6 CAN junction connector.


c.

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

C416561C07
1.188,1.281 1.615,1.531 0.427,0.25 2.573,0.479 2.74,0.479 2.74,0.479 2.74,1.333 true 2.583,2.208 2.75,2.208 2.75,2.208 2.75,1.667 true 2.75,0.313 2.917,0.313 2.917,0.313 2.917,1.333 true 2.76,2.385 2.927,2.385 2.927,2.385 2.927,1.667 true 0.094,0.083 0.406,0.281 0.313,0.198 10 false *a 1.292,1.333 1.792,1.615 0.5,0.281 10 false I132 2,0.406 2.583,0.573 0.583,0.167 10 false CANH*b 2.042,2.125 2.625,2.292 0.583,0.167 10 false CANL*b 2.188,0.229 2.771,0.448 0.583,0.219 10 false CANH*b 2.229,2.313 2.813,2.479 0.583,0.167 10 false CANL*b
*a Front view of wire harness connector
(to No. 6 CAN Junction Connector) 		*b to Central Gateway ECU (Network Gateway ECU)


Standard Resistance:
Tester Connection Condition Specified Condition
I132-1 (CANH) - I132-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
I132-2 (CANH) - I132-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Result
OK
NG



OK

REPLACE NO. 6 CAN JUNCTION CONNECTOR

NG

2.CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 CAN JUNCTION CONNECTOR)
2.CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 CAN JUNCTION CONNECTOR)
a.

Reconnect the I132 No. 6 CAN junction connector.


b.

Disconnect the I53 central gateway ECU (network gateway ECU) connector.


c.
C402518C22
1.479,0.156 1.906,0.385 0.427,0.229 2.281,0.906 2.281,0.323 2.281,0.323 2.448,0.323 true 2.354,1.802 2.188,1.802 2.188,1.802 2.188,1.219 true 1.75,1.802 1.917,1.802 1.917,1.802 1.917,1.219 true 1.885,1.969 2.052,1.969 2.052,1.969 2.052,1.219 true 0.083,0.073 0.396,0.271 0.313,0.198 10 false *a 1.615,0.188 2.073,0.385 0.458,0.198 10 false I53 2.417,1.708 2.885,1.927 0.469,0.219 10 false CA3L 1.313,1.719 1.927,1.917 0.615,0.198 10 false CAYH 2.51,0.24 2.948,0.438 0.438,0.198 10 false CA3H 1.479,1.896 2.094,2.094 0.615,0.198 10 false CAYL
*a Front view of wire harness connector
(to Central gateway ECU (network gateway ECU))


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

Standard Resistance:
Tester Connection Condition Specified Condition
I53-6 (CA3H) - I53-19 (CAYH) Cable disconnected from negative (-) battery terminal Below 1 Ω
I53-21 (CA3L) - I53-20 (CAYL) Cable disconnected from negative (-) battery terminal Below 1 Ω



Result:
Result
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

Click herePower Source / Network>NETWORKING>NETWORK GATEWAY ECU>REMOVAL


NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 CAN JUNCTION CONNECTOR)