RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694855 CAN COMMUNICATION SYSTEM(for GTMC Made HV Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for GTMC Made HV 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 store a 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

C436466E72
0.25,2.563 2.229,3.135 1.979,0.573 10 false Central Gateway ECU (Network Gateway ECU) 4.219,2.688 5.406,3.042 1.188,0.354 10 false Bus Buffer ECU 5.458,2.646 6.531,3.375 1.073,0.729 10 false CAN Compatible Optional Devices 4.219,2.5 4.823,2.771 0.604,0.271 10 false G175 4.479,1.531 4.99,1.708 0.51,0.177 10 false CAN+ 4.479,2.052 4.99,2.229 0.51,0.177 10 false CAN- 4.271,1.438 4.458,1.604 0.188,0.167 10 false 2 4.281,1.948 4.469,2.115 0.188,0.167 10 false 1 1.99,1.448 2.198,1.635 0.208,0.188 10 false 5 2.01,1.948 2.323,2.146 0.313,0.198 10 false 6 0.26,2.396 0.667,2.615 0.406,0.219 10 false G174 1.479,1.406 2,1.625 0.521,0.219 10 false CA8H 1.469,2.177 1.99,2.396 0.521,0.219 10 false CA8L

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 GTMC Made HV 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 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 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 GTMC Made HV 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 BUS WIRE
a.

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


b.
C502817C11
1.448,0.104 1.958,0.313 0.51,0.208 0.906,1.792 2.354,0.781 true 3.083,1.792 2.438,0.792 true 0.74,1.833 1.354,2.031 0.615,0.198 10 false CA8L 2.927,1.844 3.354,2.031 0.427,0.188 10 false CA8H 1.552,0.135 2.094,0.406 0.542,0.271 10 false G174 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
G174-5 (CA8H) - G174-6 (CA8L) Cable disconnected from negative (-) auxiliary battery terminal Below 70 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK FOR SHORT IN CAN BUS WIRES

NG

11.CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
2.CHECK FOR SHORT IN CAN BUS WIRES
a.
C502817C11
1.448,0.104 1.958,0.313 0.51,0.208 0.906,1.792 2.354,0.781 true 3.083,1.792 2.438,0.792 true 0.74,1.833 1.354,2.031 0.615,0.198 10 false CA8L 2.927,1.844 3.354,2.031 0.427,0.188 10 false CA8H 1.552,0.135 2.094,0.406 0.542,0.271 10 false G174 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
G174-5 (CA8H) - G174-6 (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 WIRE

NG

9.CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
3.CHECK FOR SHORT TO B+ IN CAN BUS WIRE
a.
C502817C11
1.448,0.104 1.958,0.313 0.51,0.208 0.906,1.792 2.354,0.781 true 3.083,1.792 2.438,0.792 true 0.74,1.833 1.354,2.031 0.615,0.198 10 false CA8L 2.927,1.844 3.354,2.031 0.427,0.188 10 false CA8H 1.552,0.135 2.094,0.406 0.542,0.271 10 false G174 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
G174-5 (CA8H) - Positive (+) auxiliary battery terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
G174-6 (CA8L) - Positive (+) auxiliary battery terminal



Result:
Proceed to
OK
NG



OK

4.CHECK FOR SHORT TO GND IN CAN BUS WIRE

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 WIRE
a.
C502817C11
1.448,0.104 1.958,0.313 0.51,0.208 0.906,1.792 2.354,0.781 true 3.083,1.792 2.438,0.792 true 0.74,1.833 1.354,2.031 0.615,0.198 10 false CA8L 2.927,1.844 3.354,2.031 0.427,0.188 10 false CA8H 1.552,0.135 2.094,0.406 0.542,0.271 10 false G174 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
G174-5 (CA8H) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
G174-6 (CA8L) - Body ground



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 G174 central gateway ECU (network gateway ECU) connector.

C422308C61
0.51,0.813 1.01,1.063 0.5,0.25 1.406,0.229 1.646,0.229 1.646,0.229 2.438,0.719 true 1.396,1.573 1.635,1.573 1.635,1.573 2.594,0.75 true 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 0.615,0.844 1.052,1.063 0.438,0.219 10 false G174 0.854,0.156 1.771,0.354 0.917,0.198 10 false CA8H*b 0.833,1.49 1.75,1.688 0.917,0.198 10 false CA8L*b
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		*b to Option Connector (Bus Buffer ECU)



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G174-5 (CA8H) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
G174-6 (CA8L) - Body ground



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 G175 option connector (bus buffer ECU) connector.

C505880C10
2.083,0.802 2.542,1.052 0.458,0.25 0.094,0.021 0.406,0.219 0.313,0.198 10 false *a 2.146,0.844 2.563,1.177 0.417,0.333 10 false G175
*a Front view of wire harness connector
(to Bus Buffer ECU) 		- -



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G175-2 (CAN+) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
G175-1 (CAN-) - Body ground



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 G174 central gateway ECU (network gateway ECU) connector.

C422308C61
0.51,0.813 1.01,1.063 0.5,0.25 1.406,0.229 1.646,0.229 1.646,0.229 2.438,0.719 true 1.396,1.573 1.635,1.573 1.635,1.573 2.594,0.75 true 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 0.615,0.844 1.052,1.063 0.438,0.219 10 false G174 0.854,0.156 1.771,0.354 0.917,0.198 10 false CA8H*b 0.833,1.49 1.75,1.688 0.917,0.198 10 false CA8L*b
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		*b to Option Connector (Bus Buffer ECU)



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G174-5 (CA8H) - Positive (+) auxiliary battery terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
G174-6 (CA8L) - Positive (+) auxiliary battery terminal



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 G175 option connector (bus buffer ECU) connector.

C505880C10
2.083,0.802 2.542,1.052 0.458,0.25 0.094,0.021 0.406,0.219 0.313,0.198 10 false *a 2.146,0.844 2.563,1.177 0.417,0.333 10 false G175
*a Front view of wire harness connector
(to Bus Buffer ECU) 		- -



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G175-2 (CAN+) - Positive (+) auxiliary battery terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
G175-1 (CAN-) - Positive (+) auxiliary battery terminal



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 G174 central gateway ECU (network gateway ECU) connector.

C422308C61
0.51,0.813 1.01,1.063 0.5,0.25 1.406,0.229 1.646,0.229 1.646,0.229 2.438,0.719 true 1.396,1.573 1.635,1.573 1.635,1.573 2.594,0.75 true 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 0.615,0.844 1.052,1.063 0.438,0.219 10 false G174 0.854,0.156 1.771,0.354 0.917,0.198 10 false CA8H*b 0.833,1.49 1.75,1.688 0.917,0.198 10 false CA8L*b
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		*b to Option Connector (Bus Buffer ECU)



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G174-5 (CA8H) - G174-6 (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 G174 central gateway ECU (network gateway ECU) connector.


b.

Disconnect the G175 option connector (bus buffer ECU) connector.

C505880C10
2.083,0.802 2.542,1.052 0.458,0.25 0.094,0.021 0.406,0.219 0.313,0.198 10 false *a 2.146,0.844 2.563,1.177 0.417,0.333 10 false G175
*a Front view of wire harness connector
(to Bus Buffer ECU) 		- -



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G175-2 (CAN+) - G175-1 (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 G174 central gateway ECU (network gateway ECU) connector.

C422308C61
0.51,0.813 1.01,1.063 0.5,0.25 1.406,0.229 1.646,0.229 1.646,0.229 2.438,0.719 true 1.396,1.573 1.635,1.573 1.635,1.573 2.594,0.75 true 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 0.615,0.844 1.052,1.063 0.438,0.219 10 false G174 0.854,0.156 1.771,0.354 0.917,0.198 10 false CA8H*b 0.833,1.49 1.75,1.688 0.917,0.198 10 false CA8L*b
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		*b to Option Connector (Bus Buffer ECU)



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G174-5 (CA8H) - G174-6 (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 G174 central gateway ECU (network gateway ECU) connector.


b.

Disconnect the G175 option connector (bus buffer ECU) connector.

C505880C10
2.083,0.802 2.542,1.052 0.458,0.25 0.094,0.021 0.406,0.219 0.313,0.198 10 false *a 2.146,0.844 2.563,1.177 0.417,0.333 10 false G175
*a Front view of wire harness connector
(to Bus Buffer ECU) 		- -



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G175-2 (CAN+) - G175-1 (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))