RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694854 CAN COMMUNICATION SYSTEM(for SFTM Made Gasoline Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for SFTM Made Gasoline Model)  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(Click here)
·

ECM main wire or connector

·

Power source circuit of ECM

·

ECM ground circuit

·

ECM



WIRING DIAGRAM

For the circuit diagram of the ECM source refer to the ECM power source circuit.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>ECM Power Source Circuit

For the circuit diagram of the ECM source refer to the VC output circuit.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>VC Output Circuit

C510384E13
5.604,1.927 6.125,2.188 0.521,0.26 10 false A116 0.406,1.99 2.948,2.385 2.542,0.396 10 false No. 9 CAN Junction Connector 0.417,1.75 0.875,1.948 0.458,0.198 10 false G159 5.594,2.115 7.115,2.583 1.521,0.469 10 false ECM 5.542,1.26 6,1.458 0.458,0.198 10 false CANL 5.5,0.708 5.958,0.906 0.458,0.198 10 false CANH 5.26,0.698 5.719,0.896 0.458,0.198 10 false 4 5.25,1.281 5.708,1.479 0.458,0.198 10 false 5 1.969,0.719 2.427,0.917 0.458,0.198 10 false 3 1.958,1.281 2.417,1.479 0.458,0.198 10 false 14

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 SFTM Made Gasoline Model)>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.

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


·

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 SFTM Made Gasoline 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 (ECM MAIN WIRE)
a.

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


b.
C502865C06
1.417,0.167 1.917,0.427 0.5,0.26 1.26,1.406 0.927,0.531 0.927,0.531 0.719,0.531 true 1.323,1.396 1.042,0.281 1.042,0.281 0.865,0.281 true 1.49,0.208 1.948,0.406 0.458,0.198 10 false A116 0.104,0.063 0.563,0.26 0.458,0.198 10 false *a 0.458,0.177 0.917,0.375 0.458,0.198 10 false CANL 0.292,0.438 0.75,0.635 0.458,0.198 10 false CANH
*a Front view of wire harness connector
(to ECM)


Disconnect the ECM connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A116-4 (CANH) - A116-5 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK ECM POWER SOURCE CIRCUIT

NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR