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

NETWORKING  CAN COMMUNICATION SYSTEM(for HEV Model)  Check CAN Communication Connection  


DESCRIPTION

Symptom Trouble Area
Check CAN Communication Connection
·

CAN main bus line, CAN branch line or connector

·

Power source circuit of central gateway ECU (network gateway ECU)

·

Central gateway ECU (network gateway ECU) ground circuit

·

Central gateway ECU (network gateway ECU)

·

Power source circuit of DLC3

·

DLC3 ground circuit



WIRING DIAGRAM

C484963E02
1.969,0.375 2.271,0.573 0.302,0.198 10 false 9 5.677,0.375 6.073,0.552 0.396,0.177 10 false CA4H 5.438,0.365 5.625,0.552 0.188,0.188 10 false 26 1.948,0.906 2.135,1.094 0.188,0.188 10 false 8 5.677,0.906 6.073,1.083 0.396,0.177 10 false CA4L 5.427,0.906 5.615,1.094 0.188,0.188 10 false 25 0.74,1.354 1.135,1.531 0.396,0.177 10 false O217 0.76,1.542 2.292,1.771 1.531,0.229 10 false Battery ECU Assembly 3.594,1.99 4.99,2.188 1.396,0.198 10 false from Auxiliary Battery 2.51,2.135 2.906,2.313 0.396,0.177 10 false OBD 1.969,2.427 2.125,2.625 0.156,0.198 10 false 6 0.792,2.406 0.979,2.594 0.188,0.188 10 false 16 5.427,2.406 5.615,2.594 0.188,0.188 10 false 16 5.688,2.406 6.083,2.583 0.396,0.177 10 false CA6H 1.042,2.542 1.438,2.719 0.396,0.177 10 false BAT 1.49,2.521 1.917,2.698 0.427,0.177 10 false CANH 1.958,2.948 2.146,3.135 0.188,0.188 10 false 14 5.667,2.948 6.063,3.125 0.396,0.177 10 false CA6L 0.885,2.948 1.042,3.146 0.156,0.198 10 false 4 5.427,2.948 5.625,3.146 0.198,0.198 10 false 17 1.51,3.052 1.938,3.229 0.427,0.177 10 false CANL 1.042,3.063 1.438,3.24 0.396,0.177 10 false CG 1.271,3.375 1.667,3.552 0.396,0.177 10 false I26 1.26,3.521 1.656,3.708 0.396,0.188 10 false DLC3 5.49,3.896 5.646,4.094 0.156,0.198 10 false 1 1.979,4.01 3.375,4.208 1.396,0.198 10 false from Auxiliary Battery 5.677,4.042 6.073,4.219 0.396,0.177 10 false BATT 4.083,4.167 5.01,4.385 0.927,0.219 10 false ECU-B NO. 2 5.49,4.49 5.646,4.688 0.156,0.198 10 false 2 2.344,4.604 3.365,4.823 1.021,0.219 10 false from ACC Relay 5.688,4.625 6.083,4.802 0.396,0.177 10 false ACC 4.198,4.781 4.906,4.979 0.708,0.198 10 false ECU-ACC 5.427,5.177 5.615,5.365 0.188,0.188 10 false 19 2,5.271 3.417,5.521 1.417,0.25 10 false from IGP-MAIN Relay 5.677,5.323 6.073,5.5 0.396,0.177 10 false IGP 4.01,5.458 5.01,5.656 1,0.198 10 false ECU-IGP NO. 2 5.417,5.823 5.604,6.01 0.188,0.188 10 false 20 1.938,5.906 3.917,6.146 1.979,0.24 10 false from IGR NO. 2 Relay 5.688,5.938 6.083,6.115 0.396,0.177 10 false IGR 4.052,6.104 5.052,6.302 1,0.198 10 false ECU-IGR NO. 2 5.427,6.385 5.615,6.573 0.188,0.188 10 false 22 5.688,6.521 6.083,6.698 0.396,0.177 10 false GND 5.188,6.958 5.583,7.135 0.396,0.177 10 false I231 5.177,7.146 7.115,7.531 1.938,0.385 10 false Central Gateway ECU (Network Gateway ECU) 1.469,0.469 1.865,0.646 0.396,0.177 10 false CA2H 1.49,1 1.885,1.177 0.396,0.177 10 false CA2L

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

·

Inspect the fuses for circuits related to this system before performing the following procedure.



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 GTS OPERATION
HINT:

Read the GTS operator's manual before use.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>GENERAL INFORMATION


a.

Connect the GTS to the DLC3 of another vehicle.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Check that the GTS and ECUs can communicate with the ignition switch ON.


HINT:
·

ECUs and sensors are not displayed on the "Communication Bus Check" screen when the GTS cannot communicate with the vehicle.

·

If communication between the GTS and ECUs is not possible, either the GTS or vehicle has a malfunction.

·

If communication between the GTS and ECUs is still not possible even when the GTS is connected to another vehicle, the GTS has a malfunction. Perform the self tests described in the GTS operator's manual. (The GTS may be malfunctioning or its auxiliary battery may be discharged.)



Result:
Result Proceed to
OK (Communication between the GTS and the vehicle is not possible, but communication is possible when connected to another vehicle.) A
NG (Communication is not possible between the GTS and the vehicle, nor between the GTS and another vehicle.) B



A

2.CONFIRM PROBLEM SYMPTOMS (CONFIRM ERROR ON GTS SCREEN)

B

REFER TO GTS OPERATOR'S MANUAL

2.CONFIRM PROBLEM SYMPTOMS (CONFIRM ERROR ON GTS SCREEN)
a.

Confirm error on the GTS screen.


Result:
Result Proceed to
"A communication error with Engine ECU occurred. Please confirm that Engine ECU is properly installed." is displayed. A
Cannot proceed to vehicle selection screen. B



A

3.CHECK BUS 2 MAIN LINE (CANH - CANL)

B

4.CHECK HARNESS AND CONNECTOR (DLC3 POWER SOURCE CIRCUIT)
3.CHECK BUS 2 MAIN LINE (CANH - CANL)
a.

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


b.

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

C448294C15
1.844,0.198 2.313,0.448 0.469,0.25 5.313,0.125 5.729,0.396 0.417,0.271 2.396,1.25 3,0.667 true 5.083,0.583 5.417,1.031 true 6.292,1.635 6.583,2.083 true 2.49,1.323 3.083,2.083 true 4.073,0.094 4.385,0.292 0.313,0.198 10 false *1 1.958,0.25 2.354,0.448 0.396,0.198 10 false I231 3.125,2.01 3.625,2.177 0.5,0.167 10 false CA4L 4.833,0.5 5.25,0.667 0.417,0.167 10 false CG 3.042,0.563 3.594,0.729 0.552,0.167 10 false CA4H 5.385,0.188 5.698,0.385 0.313,0.198 10 false I26 0.094,0.063 0.406,0.26 0.313,0.198 10 false *a 6.635,2 7.021,2.167 0.385,0.167 10 false BAT
*1 DLC3 - -
*a Component with harness connected
(Central Gateway ECU (Network Gateway ECU)) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition Result
I231-26 (CA4H) - I231-25 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
70 Ω or higher: Open circuit in main bus lines
I231-26 (CA4H) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
I231-25 (CA4L) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
I231-26 (CA4H) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
I231-25 (CA4L) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short



Result:
Result Proceed to
OK (CAN bus main lines are normal) A
NG (There is an open or short in a CAN bus main line of a suspected bus) B



A

GO TO SFI System
HINT:

Inspect the ECM supply power or VC voltage.



B

GO TO CHECK BUS 2 LINE

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for HEV Model)>Check Bus 2 Line


4.CHECK HARNESS AND CONNECTOR (DLC3 POWER SOURCE CIRCUIT)
a.
C428443C49
0.073,1.094 0.49,1.344 0.417,0.25 1.542,0.708 1.354,0.26 true 2.823,1.865 2.635,1.417 true 0.063,0.083 0.375,0.281 0.313,0.198 10 false *1 0.177,1.135 0.625,1.365 0.448,0.229 10 false I26 2.875,1.802 3.292,2.021 0.417,0.219 10 false BAT 1.104,0.146 1.604,0.344 0.5,0.198 10 false CG
*1 DLC3


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

Standard Voltage:
Tester Connection Condition Specified Condition
I26-16 (BAT) - Body ground Ignition switch off 11 to 14 V



b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I26-4 (CG) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK OPEN IN CAN BUS LINES

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 POWER SOURCE CIRCUIT)

5.CHECK OPEN IN CAN BUS LINES
a.
C428443C50
0.073,1.094 0.49,1.344 0.417,0.25 2.125,0.729 2.719,0.208 true 2.115,1.385 2.552,1.792 true 0.063,0.083 0.375,0.281 0.313,0.198 10 false *1 0.177,1.125 0.625,1.354 0.448,0.229 10 false I26 2.781,0.104 3.281,0.302 0.5,0.198 10 false CANH 2.385,1.833 2.885,2.031 0.5,0.198 10 false CANL
*1 DLC3


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

Standard Resistance:
Tester Connection Condition Specified Condition
I26-6 (CANH) - I26-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal Below 70 Ω



Result:
Proceed to
OK
NG



OK

6.CHECK SHORT IN CAN BUS LINE

NG

8.CHECK FOR OPEN IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3)
6.CHECK SHORT IN CAN BUS LINE
a.
C428443C51
0.073,1.094 0.49,1.344 0.417,0.25 2.146,0.74 2.354,0.25 true 1.542,0.719 1.354,0.25 true 2.833,1.875 2.646,1.406 true 1.917,1.906 2.125,1.417 true 0.063,0.083 0.375,0.281 0.313,0.198 10 false *1 0.188,1.125 0.635,1.354 0.448,0.229 10 false I26 2.385,0.125 2.885,0.323 0.5,0.198 10 false CANH 1.542,1.844 2.042,2.042 0.5,0.198 10 false CANL 1.104,0.135 1.604,0.333 0.5,0.198 10 false CG 2.854,1.823 3.208,2.063 0.354,0.24 10 false BAT
*1 DLC3


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

Standard Resistance:
Tester Connection Condition Specified Condition
I26-6 (CANH) - I26-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 Ω or higher
I26-6 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
I26-14 (CANL) - I26-4 (CG)
I26-6 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
I26-14 (CANL) - I26-16 (BAT)



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

9.CHECK SHORT IN CAN BUS LINE
7.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.

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


b.
C435681C34
1.427,0.5 1.854,0.719 0.427,0.219 0.313,1.792 0.563,0.802 true 0.417,1.792 0.75,1.135 true 0.969,2.635 0.771,2.042 true 0.781,2.865 0.51,2.031 true 0.604,3.115 0.385,2.031 true 1.521,0.531 1.979,0.729 0.458,0.198 10 false I231 0.99,2.625 1.448,2.823 0.458,0.198 10 false GND 0.594,0.688 1.052,0.885 0.458,0.198 10 false BATT 0.781,1.031 1.24,1.229 0.458,0.198 10 false ACC 0.76,2.875 1.219,3.073 0.458,0.198 10 false IGR 0.625,3.125 1.083,3.323 0.458,0.198 10 false IGP 0.104,0.073 0.563,0.271 0.458,0.198 10 false *a
*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
I231-22 (GND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω



c.

Reconnect the cable to the negative (-) auxiliary battery terminal.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
I231-1 (BATT) - Body ground Ignition switch off 11 to 14 V
I231-2 (ACC) - Body ground Ignition switch ACC 11 to 14 V
I231-20 (IGR) - Body ground Ignition switch ON 11 to 14 V
I231-19 (IGP) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

8.CHECK FOR OPEN IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3)
a.

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


b.

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

C435682C06
0.167,0.75 0.583,0.979 0.417,0.229 3.833,0.823 4.25,1.052 0.417,0.229 2.948,0.74 2.76,0.292 true 3.042,0.74 3.292,0.292 true 5.76,0.615 5.948,0.219 true 5.948,1.542 5.771,1.167 true 0.396,0.188 0.708,0.385 0.313,0.198 10 false *a 0.26,0.792 0.573,0.99 0.313,0.198 10 false I231 3.938,0.219 4.25,0.417 0.313,0.198 10 false *1 6,0.135 6.646,0.333 0.646,0.198 10 false CANH 6,1.49 6.646,1.688 0.646,0.198 10 false CANL 3.958,0.865 4.344,1.073 0.385,0.208 10 false I26 2.365,0.188 3.01,0.385 0.646,0.198 10 false CA6H 3.323,0.177 3.969,0.375 0.646,0.198 10 false CA6L
*1 DLC3 - -
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
I231-16 (CA6H) - I26-6 (CANH) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
I231-17 (CA6L) - I26-14 (CANL)



Result:
Proceed to
OK
NG



OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3)

9.CHECK SHORT IN CAN BUS LINE
a.

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


b.

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

C435682C09
0.167,0.75 0.583,0.979 0.417,0.229 3.833,0.823 4.25,1.052 0.417,0.229 2.948,0.74 2.76,0.292 true 3.042,0.74 3.292,0.292 true 5.385,0.615 5.927,0.24 true 6.396,1.552 6.219,1.177 true 0.396,0.188 0.708,0.385 0.313,0.198 10 false *a 0.26,0.792 0.573,0.99 0.313,0.198 10 false I231 3.938,0.219 4.25,0.417 0.313,0.198 10 false *1 5.979,0.135 6.625,0.333 0.646,0.198 10 false CG 6.385,1.563 7.031,1.76 0.646,0.198 10 false BAT 3.958,0.865 4.344,1.073 0.385,0.208 10 false I26 2.365,0.188 3.01,0.385 0.646,0.198 10 false CA6H 3.323,0.177 3.969,0.375 0.646,0.198 10 false CA6L
*1 DLC3 - -
*a Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU)) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
I231-16 (CA6H) - I231-17 (CA6L) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher
I231-16 (CA6H) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
I231-17 (CA6L) - I26-4 (CG)
I231-16 (CA6H) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
I231-17 (CA6L) - 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

REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))