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))  Check Bus 3 Line for Short to GND  


DESCRIPTION

There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3.

Symptom Trouble Area
There is no resistance between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3.
·

Short to ground in CAN main bus line

·

Short to ground in CAN branch line

·

Central gateway ECU (network gateway ECU)

·

Telematics transceiver

·

Navigation receiver assembly

(w/ Navigation Receiver Type)

·

No. 6 CAN junction connector



WIRING DIAGRAM

C475007E04
0.115,6.333 0.573,6.531 0.458,0.198 10 false I53 0.365,6.333 2.292,7.104 1.927,0.771 10 false Central Gateway ECU (Network Gateway ECU) 0.396,5.729 0.854,5.927 0.458,0.198 10 false 120 Ω 0.365,1.063 0.823,1.26 0.458,0.198 10 false 120 Ω 0.938,0.74 1.396,0.938 0.458,0.198 10 false CA3H 0.969,1.219 1.427,1.417 0.458,0.198 10 false CA3L 1.427,0.729 1.885,0.927 0.458,0.198 10 false 6 1.406,1.208 1.865,1.406 0.458,0.198 10 false 21 0.906,5.365 1.365,5.563 0.458,0.198 10 false CAYH 0.948,5.865 1.406,6.063 0.458,0.198 10 false CAYL 1.406,5.354 1.865,5.552 0.458,0.198 10 false 19 1.417,5.865 1.875,6.063 0.458,0.198 10 false 20 2.969,5.844 3.427,6.042 0.458,0.198 10 false 12 2.99,5.365 3.448,5.563 0.458,0.198 10 false 1 4.042,3.458 4.5,3.656 0.458,0.198 10 false 15 4.094,2.948 4.552,3.146 0.458,0.198 10 false 4 4.052,1.198 4.51,1.396 0.458,0.198 10 false 14 4.073,0.708 4.531,0.906 0.458,0.198 10 false 3 3,0.729 3.458,0.927 0.458,0.198 10 false 2 2.948,1.177 3.406,1.375 0.458,0.198 10 false 13 5.802,0.719 6.26,0.917 0.458,0.198 10 false 25 5.802,1.198 6.26,1.396 0.458,0.198 10 false 26 6.083,0.802 6.625,1.177 0.542,0.375 10 false CANP 6.083,1.302 6.594,1.521 0.51,0.219 10 false CANN 5.385,1.76 5.844,1.958 0.458,0.198 10 false I72 5.656,1.76 7.115,2.188 1.458,0.427 10 false Telematics Transceiver 5.854,3.99 7.083,4.667 1.229,0.677 10 false Navigation Receiver Assembly*1 5.5,3.99 5.958,4.188 0.458,0.198 10 false I169 6.083,3.063 6.542,3.26 0.458,0.198 10 false CANH 6.083,3.531 6.542,3.729 0.458,0.198 10 false CANL 5.865,2.969 6.323,3.167 0.458,0.198 10 false 9 5.813,3.448 6.271,3.646 0.458,0.198 10 false 10 3.177,6.406 4.427,7.271 1.25,0.865 10 false No. 6 CAN Junction Connector 2.844,6.406 3.5,6.708 0.656,0.302 10 false I132 0.219,7.292 3.354,7.615 3.135,0.323 10 false *1: w/ Navigation Receiver Type (w/ RST Switch) 5.792,5.073 6.25,5.271 0.458,0.198 10 false 13 5.802,5.583 6.26,5.781 0.458,0.198 10 false 14 6.083,5.24 6.542,5.438 0.458,0.198 10 false CANH 6.125,5.708 6.583,5.906 0.458,0.198 10 false CANL 5.521,6.146 5.979,6.344 0.458,0.198 10 false I186 5.844,6.146 7.073,6.823 1.229,0.677 10 false Navigation Receiver Assembly*2 3.333,7.302 6.833,7.594 3.5,0.292 10 false *2: w/ Navigation Receiver Type (w/o RST Switch)

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

·

Before replacing the telematics transceiver, 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 SHORT TO GND IN CAN BUS LINE (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.

C416672C40
3.646,1.333 4.115,1.573 0.469,0.24 0.271,1.375 0.708,1.604 0.438,0.229 1.042,0.677 1.208,0.677 1.208,0.677 1.208,1.427 true 1.052,2.24 1.219,2.24 1.219,2.24 1.219,1.74 true 1.875,0.677 1.708,0.677 1.708,0.677 1.708,1.427 true 1.885,2.25 1.719,2.25 1.719,2.25 1.719,1.75 true 5.073,0.656 5.24,0.656 5.24,0.656 5.24,1.156 true 1.198,0.427 1.365,0.427 1.365,0.427 1.365,1.427 true 1.208,2.417 1.375,2.417 1.375,2.417 1.375,1.75 true 1.708,0.427 1.542,0.427 1.542,0.427 1.542,1.427 true 1.708,2.417 1.542,2.417 1.542,2.417 1.542,1.75 true 0.24,0.167 0.552,0.365 0.313,0.198 10 false *a 3.719,0.188 4.031,0.385 0.313,0.198 10 false *1 3.802,1.365 4.333,1.656 0.531,0.292 10 false I26 0.365,1.406 0.74,1.604 0.375,0.198 10 false I132 0.458,0.594 1.094,0.833 0.635,0.24 10 false CANH*b 0.49,2.167 1.125,2.406 0.635,0.24 10 false CANL*b 0.667,2.344 1.302,2.583 0.635,0.24 10 false CANL*b 1.979,0.594 2.896,0.844 0.917,0.25 10 false CANH*d 4.813,0.573 5.188,0.771 0.375,0.198 10 false CG 1.792,2.333 2.427,2.573 0.635,0.24 10 false CANL*c 0.625,0.344 1.26,0.583 0.635,0.24 10 false CANH*b 1.792,0.333 2.427,0.573 0.635,0.24 10 false CANH*c 1.958,2.167 2.792,2.406 0.833,0.24 10 false CANL*d
*1 DLC3 - -
*a Front view of wire harness connector
(to No. 6 CAN Junction Connector) 		*b to Central Gateway ECU (Network Gateway ECU)
*c to Telematics Transceiver *d to Navigation Receiver Assembly
(w/ Navigation Receiver Type)


Standard Resistance:
Tester Connection Condition Specified Condition Connected to
I132-1 (CANH) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Central gateway ECU (network gateway ECU)
I132-12 (CANL) - I26-4 (CG)
I132-2 (CANH) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Central gateway ECU (network gateway ECU)
I132-13 (CANL) - I26-4 (CG)
I132-3 (CANH) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Telematics transceiver
I132-14 (CANL) - I26-4 (CG)
I132-4 (CANH) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Navigation receiver assembly*
I132-15 (CANL) - I26-4 (CG)


*: w/ Navigation Receiver Type



Result:
Result Proceed to
OK A
NG (Line to central gateway ECU (network gateway ECU)) B
NG (Line to ECU or sensor) C



A

REPLACE NO. 6 CAN JUNCTION CONNECTOR

B

2.CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

C

3.CHECK FOR SHORT TO GND IN CAN BUS LINE (ECU OR SENSOR)
2.CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
a.

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


b.

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

C416672C08
3.646,1.333 4.135,1.573 0.49,0.24 0.271,1.375 0.708,1.604 0.438,0.229 1.042,0.677 1.208,0.677 1.208,0.677 1.208,1.427 true 1.052,2.25 1.219,2.25 1.219,2.25 1.219,1.75 true 1.542,0.677 1.375,0.677 1.375,0.677 1.375,1.427 true 1.542,2.25 1.375,2.25 1.375,2.25 1.375,1.75 true 5.073,0.677 5.24,0.677 5.24,0.677 5.24,1.177 true 0.24,0.167 0.552,0.365 0.313,0.198 10 false *a 3.719,0.188 4.031,0.385 0.313,0.198 10 false *1 3.792,1.365 4.292,1.635 0.5,0.271 10 false I26 0.354,1.406 0.729,1.604 0.375,0.198 10 false I132 0.479,0.594 1.115,0.833 0.635,0.24 10 false CANH*b 0.51,2.167 1.146,2.406 0.635,0.24 10 false CANL*b 1.625,2.167 2.26,2.406 0.635,0.24 10 false CANL*b 1.625,0.594 2.26,0.833 0.635,0.24 10 false CANH*b 4.792,0.594 5.167,0.792 0.375,0.198 10 false CG
*1 DLC3 - -
*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) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
I132-12 (CANL) - I26-4 (CG)
I132-2 (CANH) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
I132-13 (CANL) - I26-4 (CG)



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 LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

3.CHECK FOR SHORT TO GND IN CAN BUS LINE (ECU OR SENSOR)
a.

Reconnect all wire harness connectors.


b.

Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to GND is connected.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model (NR Series))>TERMINALS OF ECU


c.

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

C410737C34
1.594,0.198 2.01,0.469 0.417,0.271 4.927,0.302 5.406,0.573 0.479,0.271 1.5,1.229 1.5,0.625 1.5,0.625 1.365,0.625 true 1.385,2.104 1.521,2.104 1.521,2.104 1.521,1.406 true 4.958,0.698 5.125,0.698 5.125,0.698 5.125,1.135 true 3.958,0.354 4.271,0.552 0.313,0.198 10 false *1 1.708,0.25 2.021,0.448 0.313,0.198 10 false I53 0.969,0.552 1.521,0.75 0.552,0.198 10 false CA3H 4.688,0.625 5.24,0.823 0.552,0.198 10 false CG 0.99,2.031 1.542,2.229 0.552,0.198 10 false CA3L 5.063,0.354 5.615,0.563 0.552,0.208 10 false I26 0.094,0.063 0.406,0.26 0.313,0.198 10 false *a
*1 DLC3 - -
*a Component with harness connected
(Central Gateway ECU (Network Gateway ECU)) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
I53-6 (CA3H) - I26-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
I53-21 (CA3L) - I26-4 (CG)


HINT:
·

If the resistance changes to 200 Ω or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

·

If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short to ground in the wire harness and repair or replace the wire harness or connector if necessary.




Result:
Result
OK
NG



OK

REPLACE ECU OR SENSOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR