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))  ECM Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
ECM Communication Stop Mode Any of the following conditions are met:
·

Communication stop for "ECM (Engine)" is indicated on the "Communication Bus Check" screen of the GTS.

Click here(Click here)

·

Communication stop history for "ECM (Engine)" is indicated on the "Communication Bus Check (Detail)" screen of the GTS. (The Lost Communication Time value for "ECM (Engine)" is 6 or more.)

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·

Communication system DTCs (DTCs that start with U) that correspond to "ECM Communication Stop Mode" in "DTC Combination Table" are output.

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·

ECM main line or connector

·

Power source circuit of ECM

·

ECM ground circuit

·

ECM



WIRING DIAGRAM

C416230E01
0.219,1.771 0.677,1.969 0.458,0.198 10 false I95 0.479,1.771 2.823,2.063 2.344,0.292 10 false No. 4 CAN Junction Connector 1.677,1.365 2.135,1.563 0.458,0.198 10 false 21 1.667,0.781 2.125,0.979 0.458,0.198 10 false 10 5.26,0.677 5.719,0.875 0.458,0.198 10 false 13 5.271,1.271 5.729,1.469 0.458,0.198 10 false 26 5.656,0.792 6.229,1.073 0.573,0.281 10 false CANH 5.667,1.635 6.208,1.885 0.542,0.25 10 false CANL 5.656,2.417 6.208,2.646 0.552,0.229 10 false IGSW 5.323,2.188 5.781,2.385 0.458,0.198 10 false 6 3.688,2.229 4.844,2.563 1.156,0.333 10 false ECU-IG2 NO. 1 1.323,2.396 2.958,2.729 1.635,0.333 10 false from IG2 NO. 1 Relay 5.302,2.865 5.76,3.063 0.458,0.198 10 false 2 5.323,3.594 5.781,3.792 0.458,0.198 10 false 3 5.667,3.094 6.125,3.292 0.458,0.198 10 false +B 5.656,3.823 6.115,4.021 0.458,0.198 10 false +B2 5.271,4.229 5.729,4.427 0.458,0.198 10 false 46 5.677,4.479 6.208,4.74 0.531,0.26 10 false MREL 5.656,5.219 6.115,5.417 0.458,0.198 10 false E1 5.281,5 5.74,5.198 0.458,0.198 10 false 53 5.24,4.469 5.698,4.667 0.458,0.198 10 false A46 6,5.979 6.458,6.177 0.458,0.198 10 false ECM 1.49,4.469 3.5,4.938 2.01,0.469 10 false to EFI-MAIN Relay 1.365,3.104 3.375,3.573 2.01,0.469 10 false from EFI-MAIN Relay 5.229,3.813 5.688,4.01 0.458,0.198 10 false A46 5.24,3.094 5.698,3.292 0.458,0.198 10 false A46 5.24,2.396 5.698,2.594 0.458,0.198 10 false A46 5.25,1.49 5.708,1.688 0.458,0.198 10 false A46 5.229,0.906 5.688,1.104 0.458,0.198 10 false A46 5.229,5.208 5.688,5.406 0.458,0.198 10 false C78

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

·

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 FOR OPEN IN CAN BUS LINES (ECM MAIN LINE)
a.

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


b.

Disconnect the A46 ECM connector.


c.
C380552C28
1.563,0.135 1.948,0.385 0.385,0.25 2.865,1.552 2.865,0.635 2.865,0.635 2.698,0.635 true 2.865,1.708 2.865,2.927 2.865,2.927 2.698,2.927 true 0.135,0.094 0.448,0.292 0.313,0.198 10 false *a 1.635,0.188 1.948,0.385 0.313,0.198 10 false A46 2.229,0.563 2.729,0.854 0.5,0.292 10 false CANH 2.26,2.854 2.76,3.146 0.5,0.292 10 false CANL
*a Front view of wire harness connector
(to ECM)


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

Standard Resistance:
Tester Connection Condition Specified Condition
A46-13 (CANH) - A46-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Result
OK
NG



OK

2.CHECK ECM POWER SOURCE CIRCUIT

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM)

2.CHECK ECM POWER SOURCE CIRCUIT
a.

Check the ECM power source circuit.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>ECM Power Source Circuit


Result:
Result
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)