RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694856 CAN COMMUNICATION SYSTEM(for GTMC Made Gasoline Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for GTMC Made Gasoline Model)  Certification ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Certification ECU Communication Stop Mode Communication stop for "Certification (Smart)" is indicated on the "Communication Bus Check" screen of the GTS.
Click here(Click here)
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Certification ECU (smart key ECU assembly) branch wire or connector

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Power source circuit of certification ECU (smart key ECU assembly)

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Certification ECU (smart key ECU assembly) ground circuit

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Certification ECU (smart key ECU assembly)



WIRING DIAGRAM

C348640E92
5.156,4.781 5.729,4.969 0.573,0.188 10 false G170 5.146,4.948 6.719,5.719 1.573,0.771 10 false Certification ECU (Smart Key ECU Assembly) 5.594,4.167 6.438,4.385 0.844,0.219 10 false E 5.594,3.344 6.438,3.563 0.844,0.219 10 false CUTB 5.583,2.521 6.427,2.74 0.844,0.219 10 false +B 5.375,2.417 6.219,2.635 0.844,0.219 10 false 6 5.302,3.24 6.146,3.458 0.844,0.219 10 false 22 5.292,4.063 6.135,4.281 0.844,0.219 10 false 29 1.656,0.927 2.5,1.198 0.844,0.271 10 false 2 2.177,2.5 3.135,3.24 0.958,0.74 10 false from Battery 3.833,3.198 5,3.406 1.167,0.208 10 false ECU-DCC NO.2 5.594,1 6.438,1.219 0.844,0.219 10 false CANH 5.594,1.625 6.438,1.844 0.844,0.219 10 false CANL 5.365,1.521 6.208,1.74 0.844,0.219 10 false 2 5.365,0.917 6.208,1.135 0.844,0.219 10 false 1 0.229,1.969 2.365,2.271 2.135,0.302 10 false G96 0.229,2.125 2.396,2.458 2.167,0.333 10 false No. 1 CAN Junction Connector 2.198,3.365 3.135,4.25 0.938,0.885 10 false from Battery 4.146,2.375 4.99,2.646 0.844,0.271 10 false AM2 1.656,1.531 2.5,1.802 0.844,0.271 10 false 13

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 Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING

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

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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


·

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

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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.

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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 Gasoline Model)>DIAGNOSIS SYSTEM

·

Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.



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 (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] BRANCH WIRE)
a.

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


b.
C422313C19
1.563,0.125 2.063,0.375 0.5,0.25 0.458,0.552 0.615,0.552 0.615,0.552 0.99,0.833 true 0.771,0.344 0.927,0.344 0.927,0.344 1.188,0.823 true 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 1.667,0.167 2.177,0.385 0.51,0.219 10 false G170 0.063,0.479 0.677,0.677 0.615,0.198 10 false CANH 0.385,0.271 1,0.469 0.615,0.198 10 false CANL
*a Front view of wire harness connector
(to Certification ECU [Smart Key ECU Assembly])


Disconnect the certification ECU (smart key ECU assembly) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G170-1 (CANH) - G170-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.
C422313C21
1.563,0.125 2.063,0.375 0.5,0.25 2.813,1.833 2.667,1.833 2.667,1.833 2.427,1.24 true 0.417,0.51 0.573,0.51 0.573,0.51 0.969,1.063 true 0.969,1.906 1.125,1.906 1.125,1.906 1.354,1.229 true 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 1.667,0.167 2.177,0.385 0.51,0.219 10 false G170 2.885,1.75 3.104,1.948 0.219,0.198 10 false E 0.198,0.427 0.438,0.583 0.24,0.156 10 false +B 0.552,1.833 1.229,2.063 0.677,0.229 10 false CUTB
*a Front view of wire harness connector
(to Certification ECU [Smart Key ECU Assembly])


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

Standard Resistance:
Tester Connection Condition Specified Condition
G170-29 (E) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



b.

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


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G170-6 (+B) - Body ground Always 11 to 14 V
G170-22 (CUTB) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR