RM38T0EC _57 Power Source / Network _104409 NETWORKING _0606038 CAN COMMUNICATION SYSTEM(for HEV Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for HEV Model)  Check Bus 7 Line  


DESCRIPTION

Symptom Trouble Area
There are ECUs or sensors that display a communication stop on the bus diagnostic screen. Or, there are ECUs or sensors that display communication stop history on the "Detail" screen.
·

CAN main bus line or connector

·

Central gateway ECU (network gateway ECU)

·

Option connector (bus buffer ECU)

·

CAN compatible optional devices



WIRING DIAGRAM

C434099E19
0.969,2.656 2.917,3.177 1.948,0.521 10 false Central Gateway ECU (Network Gateway ECU) 0.979,2.479 1.417,2.771 0.438,0.292 10 false I231 2.135,1.427 2.615,1.719 0.479,0.292 10 false CA8H 2.146,1.938 2.625,2.229 0.479,0.292 10 false CA8L 2.667,1.427 3.146,1.719 0.479,0.292 10 false 5 2.667,1.927 3.146,2.219 0.479,0.292 10 false 6 5,2.656 6.115,3.146 1.115,0.49 10 false Option Connector (Bus Buffer ECU) 5.01,2.479 5.448,2.771 0.438,0.292 10 false I232 4.875,1.427 5.354,1.719 0.479,0.292 10 false 2 4.875,1.938 5.354,2.229 0.479,0.292 10 false 1 5.094,1.521 5.573,1.813 0.479,0.292 10 false CAN+ 5.104,2.021 5.583,2.313 0.479,0.292 10 false CAN-

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 HEV 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 (-) auxiliary battery terminal and leave the vehicle for 10 minute 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 auxiliary battery.

HINT:

When disconnecting and reconnecting the auxiliary 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 HEV Model)>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
a.

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


b.
C472810C47
1.448,0.104 1.958,0.313 0.51,0.208 2.719,0.229 2.438,0.719 true 2.719,1.781 2.344,0.781 true 2.76,0.146 3.375,0.344 0.615,0.198 10 false CA8H 2.76,1.698 3.375,1.896 0.615,0.198 10 false CA8L 1.594,0.125 2.052,0.323 0.458,0.198 10 false I231 0.094,0.073 0.708,0.271 0.615,0.198 10 false *a
*a Component with harness connected
(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
I231-5 (CA8H) - I231-6 (CA8L) Cable disconnected from negative (-) auxiliary battery terminal Below 70 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK FOR SHORT IN CAN BUS LINES

NG

11.CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
2.CHECK FOR SHORT IN CAN BUS LINES
a.
C472810C47
1.448,0.104 1.958,0.313 0.51,0.208 2.719,0.229 2.438,0.719 true 2.719,1.781 2.344,0.781 true 2.76,0.146 3.375,0.344 0.615,0.198 10 false CA8H 2.76,1.698 3.375,1.896 0.615,0.198 10 false CA8L 1.594,0.125 2.052,0.323 0.458,0.198 10 false I231 0.094,0.073 0.708,0.271 0.615,0.198 10 false *a
*a Component with harness connected
(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
I231-5 (CA8H) - I231-6 (CA8L) Cable disconnected from negative (-) auxiliary battery terminal 54 Ω or higher



Result:
Proceed to
OK
NG



OK

3.CHECK FOR SHORT TO +B IN CAN BUS LINE

NG

9.CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
3.CHECK FOR SHORT TO +B IN CAN BUS LINE
a.

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

C489767C09
1.844,0.198 2.313,0.448 0.469,0.25 5.313,0.292 5.729,0.563 0.417,0.271 2.781,1.135 3.063,0.49 true 2.708,1.188 3.063,2.229 true 6.281,1.625 6.583,2.031 true 3.958,0.354 4.271,0.552 0.313,0.198 10 false *1 1.958,0.229 2.354,0.427 0.396,0.198 10 false I231 3.104,2.146 3.656,2.344 0.552,0.198 10 false CA8L 6.635,1.958 7.094,2.146 0.458,0.188 10 false BAT 3.104,0.406 3.656,0.604 0.552,0.198 10 false CA8H 5.417,0.344 5.729,0.542 0.313,0.198 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
I231-5 (CA8H) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
I231-6 (CA8L) - I26-16 (BAT)



Result:
Proceed to
OK
NG



OK

4.CHECK FOR SHORT TO GND IN CAN BUS LINE

NG

7.CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
4.CHECK FOR SHORT TO GND IN CAN BUS LINE
a.

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

C489767C10
1.844,0.198 2.313,0.448 0.469,0.25 5.313,0.146 5.729,0.417 0.417,0.271 2.792,1.146 3.125,0.49 true 2.708,1.177 3.021,2.208 true 5.438,1.219 4.844,2.281 true 3.958,0.354 4.271,0.552 0.313,0.198 10 false *1 1.938,0.229 2.333,0.427 0.396,0.198 10 false I231 3.063,2.135 3.615,2.333 0.552,0.198 10 false CA8L 4.594,2.198 5.146,2.396 0.552,0.198 10 false CG 3.167,0.396 3.719,0.594 0.552,0.198 10 false CA8H 5.406,0.188 5.719,0.385 0.313,0.198 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
I231-5 (CA8H) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
I231-6 (CA8L) - I26-4 (CG)



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

5.CHECK FOR SHORT TO GND IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
5.CHECK FOR SHORT TO GND IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
a.

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


b.

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

C435682C20
0.167,0.75 0.583,0.979 0.417,0.229 3.833,0.823 4.25,1.052 0.417,0.229 0.906,1.469 1.26,0.792 true 1.792,1.479 1.385,0.781 true 5.313,0.771 4.51,1.531 true 0.396,0.188 0.708,0.385 0.313,0.198 10 false *a 0.25,0.781 0.563,0.979 0.313,0.198 10 false I231 3.938,0.219 4.25,0.417 0.313,0.198 10 false *1 3.948,0.844 4.333,1.052 0.385,0.208 10 false I26 1.823,1.469 2.469,1.667 0.646,0.198 10 false CA8L*b 0.458,1.49 1.104,1.688 0.646,0.198 10 false CA8H*b 4.25,1.458 4.635,1.667 0.385,0.208 10 false CG
*1 DLC3 - -
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		*b to Option Connector (Bus Buffer ECU)


Standard Resistance:
Tester Connection Condition Specified Condition
I231-5 (CA8H) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
I231-6 (CA8L) - I26-4 (CG)



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

6.CHECK FOR SHORT TO GND IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU))
6.CHECK FOR SHORT TO GND IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU))
a.

Disconnect the option connector (bus buffer ECU) connector.


b.

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

C446923C20
3.729,0.76 4.135,1.031 0.406,0.271 0.229,0.781 0.635,1.052 0.406,0.271 1.667,1.438 2.083,1.021 true 2.896,1.427 2.375,1 true 4.51,1.552 5.365,0.76 true 0.385,0.188 0.698,0.385 0.313,0.198 10 false *a 3.729,0.156 4.042,0.354 0.313,0.198 10 false *1 3.844,0.813 4.156,1.01 0.313,0.198 10 false I26 0.313,0.823 0.625,1.021 0.313,0.198 10 false I232 1.115,1.385 1.688,1.594 0.573,0.208 10 false CAN+*b 2.948,1.396 3.521,1.604 0.573,0.208 10 false CAN-*b 4.26,1.479 4.833,1.688 0.573,0.208 10 false CG
*1 DLC3 - -
*a Front view of wire harness connector
(to Option Connector (Bus Buffer ECU)) 		*b to Central Gateway ECU (Network Gateway ECU)


Standard Resistance:
Tester Connection Condition Specified Condition
I232-2 (CAN+) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
I232-1 (CAN-) - I26-4 (CG)



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

7.CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
a.

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


b.

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

C435682C21
0.167,0.75 0.583,0.979 0.417,0.229 3.833,0.823 4.25,1.052 0.417,0.229 0.906,1.469 1.26,0.792 true 1.792,1.479 1.385,0.781 true 6.219,1.167 6.479,1.375 true 0.396,0.188 0.708,0.385 0.313,0.198 10 false *a 0.24,0.781 0.552,0.979 0.313,0.198 10 false I231 3.938,0.219 4.25,0.417 0.313,0.198 10 false *1 3.938,0.833 4.323,1.042 0.385,0.208 10 false I26 1.813,1.479 2.458,1.677 0.646,0.198 10 false CA8L*b 0.427,1.479 1.073,1.677 0.646,0.198 10 false CA8H*b 6.542,1.271 6.927,1.479 0.385,0.208 10 false BAT
*1 DLC3 - -
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		*b to Option Connector (Bus Buffer ECU)


Standard Resistance:
Tester Connection Condition Specified Condition
I231-5 (CA8H) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
I231-6 (CA8L) - I26-16 (BAT)



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

8.CHECK FOR SHORT TO +B IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU))
8.CHECK FOR SHORT TO +B IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU))
a.

Disconnect the option connector (bus buffer ECU) connector.


b.

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

C446923C21
3.729,0.76 4.135,1.031 0.406,0.271 0.229,0.781 0.635,1.052 0.406,0.271 1.677,1.479 2.094,1.063 true 2.833,1.479 2.375,1.052 true 6.594,1.385 6.281,1.156 true 0.385,0.188 0.698,0.385 0.313,0.198 10 false *a 3.729,0.156 4.042,0.354 0.313,0.198 10 false *1 3.854,0.802 4.167,1 0.313,0.198 10 false I26 0.302,0.823 0.615,1.021 0.313,0.198 10 false I232 1.208,1.479 1.917,1.708 0.708,0.229 10 false CAN+*b 2.854,1.479 3.438,1.729 0.583,0.25 10 false CAN-*b 6.656,1.396 7.156,1.635 0.5,0.24 10 false BAT
*1 DLC3 - -
*a Front view of wire harness connector
(to Option Connector (Bus Buffer ECU)) 		*b to Central Gateway ECU (Network Gateway ECU)


Standard Resistance:
Tester Connection Condition Specified Condition
I232-2 (CAN+) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
I232-1 (CAN-) - I26-16 (BAT)



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

9.CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
a.

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


b.
C435681C93
1.406,0.667 1.917,0.917 0.51,0.25 0.26,2.74 0.771,1.875 true 1.729,2.708 0.906,1.833 true 1.521,0.698 1.979,0.896 0.458,0.198 10 false I231 0.146,0.146 0.604,0.344 0.458,0.198 10 false *a 1.583,2.76 2.042,2.958 0.458,0.198 10 false CA8L 0.073,2.75 0.531,2.948 0.458,0.198 10 false CA8H
*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
I231-5 (CA8H) - I231-6 (CA8L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

10.CHECK FOR SHORT IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU))
10.CHECK FOR SHORT IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU))
a.

Reconnect the I231 central gateway ECU (network gateway ECU) connector.


b.

Disconnect the option connector (bus buffer ECU) connector.


c.
C457326C12
1.458,0.167 1.958,0.417 0.5,0.25 0.917,1.885 1.583,1.333 true 2.552,1.875 1.833,1.333 true 1.573,0.208 2.031,0.406 0.458,0.198 10 false I232 0.75,1.917 1.365,2.115 0.615,0.198 10 false CAN+ 2.385,1.917 3,2.115 0.615,0.198 10 false CAN- 0.188,0.146 0.5,0.302 0.313,0.156 10 false *a
*a Front view of wire harness connector
(to Option Connector (Bus Buffer ECU))


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

Standard Resistance:
Tester Connection Condition Specified Condition
I232-2 (CAN+) - I232-1 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

11.CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
a.

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


b.
C435681C93
1.406,0.667 1.917,0.917 0.51,0.25 0.26,2.74 0.771,1.875 true 1.729,2.708 0.906,1.833 true 1.521,0.698 1.979,0.896 0.458,0.198 10 false I231 0.146,0.146 0.604,0.344 0.458,0.198 10 false *a 1.583,2.76 2.042,2.958 0.458,0.198 10 false CA8L 0.073,2.75 0.531,2.948 0.458,0.198 10 false CA8H
*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
I231-5 (CA8H) - I231-6 (CA8L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

12.CHECK FOR OPEN IN CAN MAIN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU))
12.CHECK FOR OPEN IN CAN MAIN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU))
a.

Reconnect the I231 central gateway ECU (network gateway ECU) connector.


b.

Disconnect the option connector (bus buffer ECU) connector.


c.
C457326C12
1.458,0.167 1.958,0.417 0.5,0.25 0.917,1.885 1.583,1.333 true 2.552,1.875 1.833,1.333 true 1.573,0.208 2.031,0.406 0.458,0.198 10 false I232 0.75,1.917 1.365,2.115 0.615,0.198 10 false CAN+ 2.385,1.917 3,2.115 0.615,0.198 10 false CAN- 0.188,0.146 0.5,0.302 0.313,0.156 10 false *a
*a Front view of wire harness connector
(to Option Connector (Bus Buffer ECU))


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

Standard Resistance:
Tester Connection Condition Specified Condition
I232-2 (CAN+) - I232-1 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))