RM35X0E _57 Power Source / Network _078518 NETWORKING _0381088 CAN COMMUNICATION SYSTEM J

NETWORKING  CAN COMMUNICATION SYSTEM  ECM Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
ECM Communication Stop Mode Communication stop for "ECM (Engine)" is indicated on the "Communication Bus Check" screen of the GTS.
(Click here)
·

ECM main wire or connector

·

Power source circuit of ECM

·

ECM ground circuit

·

ECM



WIRING DIAGRAM

for 1GD-FTV
C414318
4.635,0.76 6,0.99 1.365,0.229 10 false EFI-MAIN 5.552,0.604 6.125,0.948 0.573,0.344 10 false N2 5.594,0.063 6.167,0.406 0.573,0.344 10 false 17 5.875,0.917 6.448,1.26 0.573,0.344 10 false BATT 5.604,1.063 6.177,1.406 0.573,0.344 10 false 4 5.854,1.219 6.427,1.563 0.573,0.344 10 false +B 5.604,1.385 6.177,1.729 0.573,0.344 10 false 3 5.865,1.531 6.438,1.875 0.573,0.344 10 false +B2 5.604,1.698 6.177,2.042 0.573,0.344 10 false 2 5.563,2 6.135,2.344 0.573,0.344 10 false 14 5.875,2.479 6.448,2.823 0.573,0.344 10 false EC 2.969,1.198 5.333,1.542 2.365,0.344 10 false from EFI MAIN Relay 6.104,4.188 6.594,4.5 0.49,0.313 10 false ECM 5.885,2.135 6.458,2.479 0.573,0.344 10 false MREL 5.865,2.844 6.438,3.188 0.573,0.344 10 false ME01 5.865,3.188 6.438,3.531 0.573,0.344 10 false E1 5.896,3.896 6.469,4.24 0.573,0.344 10 false E01 5.875,3.542 6.448,3.885 0.573,0.344 10 false E02 5.865,1.844 6.438,2.188 0.573,0.344 10 false +B3 3.104,2.146 5.323,2.438 2.219,0.292 10 false to EFI MAIN Relay 3.479,0.865 4.531,1.094 1.052,0.229 10 false from Battery 5.521,0.917 6.094,1.26 0.573,0.344 10 false N2 5.542,1.219 6.115,1.563 0.573,0.344 10 false N2 5.542,2.135 6.115,2.479 0.573,0.344 10 false N2 5.542,1.552 6.115,1.802 0.573,0.25 10 false N2 5.542,2.469 6.115,2.813 0.573,0.344 10 false A2 5.542,2.823 6.115,3.167 0.573,0.344 10 false A2 5.521,3.177 6.094,3.521 0.573,0.344 10 false A2 5.552,3.531 6.125,3.875 0.573,0.344 10 false A2 5.542,3.896 6.115,4.24 0.573,0.344 10 false A2 5.594,3.719 6.167,4.063 0.573,0.344 10 false 4 5.583,3.365 6.156,3.708 0.573,0.344 10 false 3 5.583,3.021 6.156,3.365 0.573,0.344 10 false 5 5.594,2.656 6.167,3 0.573,0.344 10 false 1 5.583,2.313 6.156,2.656 0.573,0.344 10 false 8 5.563,1.833 6.135,2.083 0.573,0.25 10 false N2 5.594,0.76 6.167,1.104 0.573,0.344 10 false 1 5.563,0.427 6.135,0.771 0.573,0.344 10 false 28 5.552,0.24 6.125,0.583 0.573,0.344 10 false N2 0.375,1.094 2.344,1.458 1.969,0.365 10 false No. 7 CAN Junction Connector 0.385,0.833 0.875,1.146 0.49,0.313 10 false N127 1.667,0.51 2.156,0.823 0.49,0.313 10 false 12 1.667,0.135 2.156,0.448 0.49,0.313 10 false 1 6.146,0.208 6.719,0.552 0.573,0.344 10 false CANH 6.156,0.594 6.729,0.938 0.573,0.344 10 false CANL

for 7GR-FKS
C380553
0.198,1.594 0.656,1.792 0.458,0.198 10 false N127 0.219,1.771 2.49,2.083 2.271,0.313 10 false No. 7 Junction Connector 1.677,1.365 2.135,1.563 0.458,0.198 10 false 12 1.677,0.781 2.135,0.979 0.458,0.198 10 false 1 5.26,0.667 5.719,0.865 0.458,0.198 10 false 27 5.656,0.781 6.115,0.979 0.458,0.198 10 false CANH 5.26,1.271 5.719,1.469 0.458,0.198 10 false 35 5.677,1.646 6.135,1.844 0.458,0.198 10 false CANL 5.313,2.177 5.771,2.375 0.458,0.198 10 false 7 5.26,2.396 5.719,2.594 0.458,0.198 10 false A1 5.646,2.417 6.146,2.635 0.5,0.219 10 false IGSW 5.292,2.854 5.75,3.052 0.458,0.198 10 false 3 5.646,3.104 6.104,3.302 0.458,0.198 10 false +B 5.302,3.594 5.76,3.792 0.458,0.198 10 false 4 5.635,3.802 6.094,4 0.458,0.198 10 false +B2 5.26,4.25 5.719,4.448 0.458,0.198 10 false 25 5.656,4.479 6.156,4.688 0.5,0.208 10 false MREL 5.667,5.229 6.125,5.427 0.458,0.198 10 false E1 5.229,5.219 5.688,5.417 0.458,0.198 10 false E3 5.271,4.99 5.729,5.188 0.458,0.198 10 false 1 5.854,5.938 6.313,6.135 0.458,0.198 10 false ECM 1.563,4.458 3.458,4.813 1.896,0.354 10 false to EFI MAIN Relay 1.365,2.396 2.99,2.802 1.625,0.406 10 false from IG2 MAIN Relay 3.823,2.24 5,2.49 1.177,0.25 10 false IG2 NO.1 5.25,1.51 5.708,1.708 0.458,0.198 10 false N1 5.271,0.917 5.729,1.115 0.458,0.198 10 false N1 5.26,3.083 5.719,3.281 0.458,0.198 10 false A1 5.26,3.813 5.719,4.01 0.458,0.198 10 false A1 5.26,4.448 5.719,4.646 0.458,0.198 10 false A1 1.396,3.083 3.292,3.438 1.896,0.354 10 false from EFI MAIN Relay

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>HOW TO PROCEED WITH TROUBLESHOOTING

·

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

·

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 (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

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.

·

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.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE

·

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>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 VEHICLE TYPE
a.

Check for vehicle type.


Result:
Result Proceed to
for 1GD-FTV A
for 7GR-FKS B



A

2.CHECK FOR OPEN IN CAN BUS WIRE (ECM MAIN WIRE)

B

4.CHECK FOR OPEN IN CAN BUS WIRE (ECM MAIN WIRE)
2.CHECK FOR OPEN IN CAN BUS WIRE (ECM MAIN WIRE)
a.

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


b.

Disconnect the N2 ECM connector.

C414362C02
3.302,0.292 3.802,0.531 0.5,0.24 2.354,1.396 2.521,1.396 2.521,1.396 2.896,1.667 false 2.438,2.125 2.604,2.125 2.604,2.125 2.844,1.875 false 3.427,0.333 4.042,0.531 0.615,0.198 10 false N2 0.073,0.094 0.688,0.292 0.615,0.198 10 false *a 1.906,1.333 2.521,1.531 0.615,0.198 10 false CANH 2.063,2.052 2.677,2.25 0.615,0.198 10 false CANL
*a Front view of wire harness connector
(to ECM) 		- -



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N2-17 (CANH) - N2-28 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.

Disconnect the A2 ECM connector.

C382827C06
1.948,0.146 2.448,0.385 0.5,0.24 4.885,0.229 5.385,0.469 0.5,0.24 1.188,0.677 1.385,0.677 1.385,0.677 1.927,1.135 true 2.385,1.188 3.052,0.854 3.052,0.854 3.333,0.854 true 3.094,0.573 2.833,0.573 2.833,0.573 2.208,1.198 true 0.833,0.896 1.073,0.896 1.073,0.896 1.531,1.177 true 0.906,1.302 1.063,1.302 1.063,1.302 1.521,1.469 true 4.135,0.552 4.375,0.552 4.375,0.552 4.667,1.177 true 4.24,0.24 4.479,0.24 4.479,0.24 4.833,1.146 true 5.052,1.167 5.698,0.208 5.698,0.208 5.979,0.208 true 5.271,1.167 5.958,0.438 5.958,0.438 6.24,0.438 true 5.635,1.438 6.198,1.01 6.198,1.01 6.479,1.01 true 2.063,0.188 2.677,0.385 0.615,0.198 10 false A2 0.073,0.094 0.688,0.292 0.615,0.198 10 false *a 0.438,0.823 1.052,1.021 0.615,0.198 10 false ME01 0.813,0.583 1.427,0.781 0.615,0.198 10 false E02 3.135,0.521 3.75,0.719 0.615,0.198 10 false E01 3.406,0.802 4.021,1 0.615,0.198 10 false E1 0.667,1.24 1.281,1.438 0.615,0.198 10 false EC 5.042,0.281 5.656,0.479 0.615,0.198 10 false N2 3.74,0.469 4.354,0.667 0.615,0.198 10 false BATT 3.958,0.167 4.573,0.365 0.615,0.198 10 false +B3 6.042,0.125 6.656,0.323 0.615,0.198 10 false +B2 6.302,0.354 6.917,0.552 0.615,0.198 10 false +B 6.542,0.938 7.156,1.135 0.615,0.198 10 false MREL
*a Front view of wire harness connector
(to ECM) 		- -



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A2-1 (ME01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
A2-3 (E02) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
A2-4 (E01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
A2-5 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
A2-8 (EC) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



c.

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


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N2-1 (BATT) - Body ground Always 11 to 14 V
N2-4 (+B) - Body ground Terminal N2-14 (MREL) connectedto body ground 11 to 14 V
N2-3 (+B2) - Body ground 11 to 14 V
N2-2 (+B3) - Body ground 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>1GD-FTV (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK FOR OPEN IN CAN BUS WIRE (ECM MAIN WIRE)
a.

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


b.

Disconnect the N1 ECM connector.

C414362C03
3.302,0.292 3.802,0.531 0.5,0.24 4.729,1.396 4.563,1.396 4.563,1.396 4.281,1.656 true 4.729,2.177 4.563,2.177 4.563,2.177 4.26,1.865 true 3.427,0.333 4.042,0.531 0.615,0.198 10 false N1 0.073,0.094 0.688,0.292 0.615,0.198 10 false *a 4.781,1.333 5.396,1.531 0.615,0.198 10 false CANH 4.781,2.104 5.396,2.302 0.615,0.198 10 false CANL
*a Front view of wire harness connector
(to ECM) 		- -



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N1-27 (CANH) - N1-35 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.

Disconnect the A1 and E3 ECM connectors.

C414444C01
4.802,0.583 5.208,0.833 0.406,0.25 1.927,0.583 2.344,0.833 0.417,0.25 1.063,1.073 1.229,1.073 1.229,1.073 1.625,1.438 true 4.104,0.813 4.271,0.813 4.271,0.813 4.823,1.427 true 4.229,0.573 4.396,0.573 4.396,0.573 4.99,1.427 true 4.958,2.333 5.125,2.333 5.125,2.333 5.521,1.792 true 5.51,1.396 5.75,1.052 5.75,1.052 5.917,1.052 true 4.917,0.625 5.333,0.833 0.417,0.208 10 false A1 2.042,0.625 2.448,0.875 0.406,0.25 10 false E3 0.833,0.99 1.313,1.177 0.479,0.188 10 false E1 5.958,0.969 6.531,1.188 0.573,0.219 10 false IGSW 0.177,0.125 0.448,0.375 0.271,0.25 10 false *a 3.865,0.75 4.344,0.938 0.479,0.188 10 false +B 3.917,0.49 4.396,0.677 0.479,0.188 10 false +B2 4.521,2.26 5,2.448 0.479,0.188 10 false MREL
*a Front view of wire harness connector
(to ECM) 		- -



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E3-1 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



c.

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


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A1-3 (+B) - Body ground Battery positive (+) voltage applied to terminal A1-25 (MREL) 11 to 14 V
A1-4 (+B2) - Body ground 11 to 14 V
A1-7 (IGSW) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR