NETWORKING  CAN COMMUNICATION SYSTEM  Certification ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Certification ECU Communication Stop Mode Either condition is met:
·

"Certification (Smart)" is not displayed on the CAN Bus Check screen of the GTS.

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·

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

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·

Certification ECU (smart key ECU assembly) branch line or connector

·

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

·

Certification ECU (smart key ECU assembly) ground circuit

·

Certification ECU (smart key ECU assembly)



WIRING DIAGRAM

C380043E01
4.917,1.281 4.917,0.865 4.917,0.865 5.083,0.865 false 3.333,1.281 3.333,0.365 3.333,0.365 3.5,0.365 false 0.135,0.094 1.24,0.333 1.104,0.24 12 false V Bus: 2.083,0.573 3.188,0.813 1.104,0.24 10 false DLC3 5.167,0.792 7.063,1.125 1.896,0.333 10 false No. 1 CAN Junction Connector 3.583,0.271 5.479,0.604 1.896,0.333 10 false No. 2 CAN Junction Connector 0.656,2.208 1.167,2.469 0.51,0.26 10 false 120 Ω 6.115,2.219 6.625,2.479 0.51,0.26 10 false 120 Ω 0.25,2.823 1.427,3.396 1.177,0.573 10 false Combination Meter Assembly 6.188,2.823 6.677,3.24 0.49,0.417 10 false ECM 5.094,3.896 6.073,4.25 0.979,0.354 10 false Trouble Area 3,3.083 3.5,3.479 0.5,0.396 10 false E110 3.49,3.083 3.854,3.396 0.365,0.313 10 false E110 2.354,3.938 2.719,4.25 0.365,0.313 10 false E110 2.354,3.458 2.719,3.771 0.365,0.313 10 false E108 4.198,3.573 4.563,3.885 0.365,0.313 10 false E108 3.49,3.292 3.99,3.688 0.5,0.396 10 false CANL 2.969,3.281 3.469,3.677 0.5,0.396 10 false CANH 3.979,3.583 4.208,3.906 0.229,0.323 10 false E 2.771,3.448 3.083,3.719 0.313,0.271 10 false +B 2.781,3.938 3.094,4.208 0.313,0.271 10 false IG 4.292,3.375 4.615,3.615 0.323,0.24 10 false 11 3.906,3.094 4.229,3.333 0.323,0.24 10 false 15 2.771,3.094 3.094,3.333 0.323,0.24 10 false 14 2.49,3.25 2.813,3.49 0.323,0.24 10 false 2 2.479,3.74 2.802,3.979 0.323,0.24 10 false 5 1.844,3.615 2.208,3.927 0.365,0.313 10 false AM2 1.865,4.083 2.229,4.396 0.365,0.313 10 false IGN 1.969,4.354 4.813,4.688 2.844,0.333 10 false Certification ECU (Smart Key ECU Assembly) 1.125,5.01 3,5.302 1.875,0.292 10 false : CAN Main Bus Line (CANH) 1.125,5.417 3.052,5.646 1.927,0.229 10 false : CAN Main Bus Line (CANL) 4.281,5.021 6.156,5.313 1.875,0.292 10 false : CAN Branch Line (CANH) 4.281,5.427 6.156,5.719 1.875,0.292 10 false : CAN Branch Line (CANL)

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.


NOTICE:
·

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 1 minute or more before measuring the resistance.

·

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>PRECAUTION

·

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

·

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.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM

·

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



HINT:
·

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

·

Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.



PROCEDURE

1.CHECK FOR OPEN IN CAN BUS LINES (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH LINE)
a.

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


b.

Disconnect the E110 certification ECU (smart key ECU assembly) connector.


c.
C289270C07
1.49,0.167 1.917,0.448 0.427,0.281 1.438,1.802 1.552,1.802 1.552,1.802 1.927,1.156 true 2.438,1.781 2.333,1.781 2.333,1.781 2.031,1.156 true 0.042,0.042 0.354,0.24 0.313,0.198 10 false *a 1.552,0.219 2.01,0.417 0.458,0.198 10 false E110 1.01,1.708 1.625,1.906 0.615,0.198 10 false CANH 2.51,1.688 3.125,1.885 0.615,0.198 10 false CANL
*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
E110-14 (CANH) - E110-15 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω



Result:
Result
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

Disconnect the E108 certification ECU (smart key ECU assembly) connector.


b.
C289272C03
1.521,0.208 1.906,0.479 0.385,0.271 0.719,1.823 0.896,1.823 0.896,1.823 1.146,1.396 true 0.073,0.063 0.385,0.26 0.313,0.198 10 false *a 1.573,0.25 2.031,0.448 0.458,0.198 10 false E108 0.563,1.719 0.719,1.917 0.156,0.198 10 false E
*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
E108-11 (E) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



c.

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


d.
C289271C07
1.5,0.271 1.927,0.563 0.427,0.292 1.521,2.469 1.948,2.76 0.427,0.292 2.375,1.146 2.552,0.646 2.552,0.646 2.677,0.646 true 2.292,3.302 2.625,3.042 2.625,3.042 2.719,3.042 true 0.073,0.063 0.385,0.26 0.313,0.198 10 false *a 1.563,0.323 2.021,0.521 0.458,0.198 10 false E110 1.583,2.51 2.042,2.708 0.458,0.198 10 false E108 2.75,0.552 3.063,0.75 0.313,0.198 10 false IG 2.781,2.948 3.094,3.146 0.313,0.198 10 false +B
*a Front view of wire harness connector
(to Certification ECU (Smart Key ECU Assembly))


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

Standard Voltage:
Tester Connection Condition Specified Condition
E108-2 (+B) - Body ground Always 11 to 14 V
E110-5 (IG) - Body ground Ignition switch ON 11 to 14 V



Result:
Result
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)