NETWORKING  CAN COMMUNICATION SYSTEM  Open in CAN Main Bus Line  


DESCRIPTION

There may be an open circuit in one of the V bus main lines and/or a DLC3 branch line when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 70 Ω or higher.

Symptom Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is 70 Ω or higher.
·

DLC3 branch line or connector

·

CAN main bus line or connector

·

ECM

·

Combination meter assembly

·

No. 1 CAN junction connector

·

No. 2 CAN junction connector



This malfunction is not related to the lines of a CAN main bus branch or to ECUs or sensors connected to a CAN main bus branch.

WIRING DIAGRAM

C295895E03
0.073,0.042 3.01,0.281 2.938,0.24 12 false V Bus: 5.729,0.115 7.01,0.448 1.281,0.333 10 false x: Suspected Area 3.292,0.198 4.063,0.396 0.771,0.198 10 false 120 Ω 3.313,7.271 4.083,7.469 0.771,0.198 10 false 120 Ω 0.938,7.854 4.917,8.052 3.979,0.198 10 false : CAN Main Bus Line (CANH) 0.938,8.271 4.917,8.469 3.979,0.198 10 false : CAN Main Bus Line (CANL) 4.281,7.844 6.052,8.094 1.771,0.25 10 false : CAN Branch Line (CANH) 4.281,8.25 6.021,8.521 1.74,0.271 10 false : CAN Branch Line (CANL) 2.594,6.646 3.208,6.844 0.615,0.198 10 false CANL 3.958,6.646 4.573,6.844 0.615,0.198 10 false CANH 3.938,5.531 4.094,5.729 0.156,0.198 10 false B 2.823,5.552 2.979,5.75 0.156,0.198 10 false W 3.906,5.219 4.063,5.583 0.156,0.365 10 false 6 2.885,5.229 3.198,5.427 0.313,0.198 10 false 17 3.917,3.833 4.073,4.031 0.156,0.198 10 false 1 2.875,3.844 3.188,4.042 0.313,0.198 10 false 12 0.594,4.531 4.875,4.729 4.281,0.198 10 false No. 1 CAN Junction Connector 0.25,4.531 0.708,4.729 0.458,0.198 10 false A39 2.833,3.354 2.99,3.552 0.156,0.198 10 false W 3.969,3.375 4.125,3.573 0.156,0.198 10 false L 3.906,3.01 4.063,3.208 0.156,0.198 10 false 5 2.875,3 3.188,3.198 0.313,0.198 10 false 16 0.615,2.271 4.896,2.469 4.281,0.198 10 false No. 2 CAN Junction Connector 0.271,2.271 0.729,2.469 0.458,0.198 10 false E55 4.396,2.01 4.708,2.208 0.313,0.198 10 false 11 4.396,2.51 4.708,2.708 0.313,0.198 10 false 22 4.802,1.969 5.115,2.167 0.313,0.198 10 false BE 4.823,2.573 5.01,2.792 0.188,0.219 10 false W 5.26,2.031 5.417,2.229 0.156,0.198 10 false 6 5.365,2.5 5.677,2.698 0.313,0.198 10 false 14 5.49,2.125 6.104,2.323 0.615,0.198 10 false CANH 5.625,2.385 6.24,2.583 0.615,0.198 10 false CANL 5.635,2.698 6.094,2.896 0.458,0.198 10 false E13 5.99,2.698 6.604,2.896 0.615,0.198 10 false DLC3 3.917,1.604 4.073,1.802 0.156,0.198 10 false 4 2.875,1.625 3.188,1.823 0.313,0.198 10 false 15 3.948,1.323 4.26,1.521 0.313,0.198 10 false LG 2.833,1.333 2.99,1.531 0.156,0.198 10 false W 2.865,1.031 3.177,1.229 0.313,0.198 10 false 31 3.906,1.031 4.219,1.229 0.313,0.198 10 false 32 3.958,0.823 4.573,1.021 0.615,0.198 10 false CANH 2.625,0.823 3.24,1.021 0.615,0.198 10 false CANL 0.229,0.531 0.688,0.729 0.458,0.198 10 false E43 0.563,0.531 4.542,0.729 3.979,0.198 10 false Combination Meter Assembly 2.073,6.969 2.531,7.167 0.458,0.198 10 false ECM 3.719,6.083 4.177,6.281 0.458,0.198 10 false A40 2.969,6.083 3.427,6.281 0.458,0.198 10 false A40 2.969,6.26 3.427,6.458 0.458,0.198 10 false A56 3.729,6.26 4.188,6.458 0.458,0.198 10 false A56 3.729,6.448 4.188,6.646 0.458,0.198 10 false A56 2.969,6.448 3.427,6.646 0.458,0.198 10 false A56 4.115,6.083 4.729,6.281 0.615,0.198 10 false 13*1 2.5,6.083 3.115,6.281 0.615,0.198 10 false 26*1 4.135,6.26 4.75,6.458 0.615,0.198 10 false 8*2 2.573,6.271 3.188,6.469 0.615,0.198 10 false 9*2 4.135,6.448 4.594,6.646 0.458,0.198 10 false 41*3 2.51,6.448 2.969,6.646 0.458,0.198 10 false 49*3 5.177,5.469 6.229,5.792 1.052,0.323 10 false *1: for 2ZR-FE 5.177,5.813 6.354,6.104 1.177,0.292 10 false *2: for 1ZR-FE 5.177,6.198 6.854,7.063 1.677,0.865 10 false *3: for 2NZ-FE

CAUTION / NOTICE / HINT

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 at least 20 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds 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



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 (DLC3 BRANCH LINE)
a.

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


b.
C151827C69
1.5,0.708 2,0.958 0.5,0.25 2.052,1.854 2.302,1.271 2.302,1.271 2.542,1.271 true 2.052,2.583 1.865,3.042 1.865,3.042 1.667,3.042 true 0.135,0.125 0.552,0.458 0.417,0.333 10 false *1 2.594,1.167 3.167,1.49 0.573,0.323 10 false CANH 1.26,2.938 2.031,3.302 0.771,0.365 10 false CANL 1.625,0.75 2.198,1.188 0.573,0.438 10 false E13
*1 DLC3


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

Standard Resistance:
Tester Connection Condition Specified Condition
E13-6 (CANH) - E13-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω


NOTICE:

When the measured value is 133 Ω or higher and a CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from How to Proceed with Troubleshooting after repairing the trouble area.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING



Result:
Result
OK
NG



OK

2.CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)

NG

REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3

2.CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)
a.
C304159C11
1.521,0.052 1.969,0.24 0.448,0.188 1.344,1.948 1.573,1.948 1.573,1.948 1.854,1.656 true 2.427,1.938 2.167,1.938 2.167,1.938 1.948,1.656 true 0.073,0.073 0.479,0.385 0.406,0.313 10 false *a 2.479,1.865 3.094,2.125 0.615,0.26 10 false CANH 0.969,1.865 1.521,2.115 0.552,0.25 10 false CANL 1.625,0.063 2.24,0.323 0.615,0.26 10 false E43
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the E43 combination meter assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E43-32 (CANH) - E43-31 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Result
OK
NG



OK

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


NG

3.CHECK FOR OPEN IN CAN BUS LINES (ECM - NO. 1 CAN JUNCTION CONNECTOR)
3.CHECK FOR OPEN IN CAN BUS LINES (ECM - NO. 1 CAN JUNCTION CONNECTOR)
a.

Reconnect the E43 combination meter assembly connector.


b.
C294589C07
1.615,0.104 2.031,0.438 0.417,0.333 1.719,2.177 2.135,2.51 0.417,0.333 2.51,1.104 2.646,0.25 2.646,0.25 2.729,0.25 true 2.802,0.667 2.719,0.667 2.719,0.667 2.51,1.198 true 2.229,3.135 2.552,2.448 2.552,2.448 2.667,2.448 true 2.323,3.135 2.635,2.667 2.635,2.667 2.771,2.667 true 2.667,4.365 2.573,4.365 2.573,4.365 2.5,3.646 true 2.5,3.531 2.635,4.146 2.635,4.146 2.719,4.146 true 0.104,0.094 0.417,0.292 0.313,0.198 10 false *a 1.708,0.156 2.167,0.354 0.458,0.198 10 false A40 2.094,0.156 2.406,0.354 0.313,0.198 10 false *A 2.792,0.156 3.427,0.521 0.635,0.365 10 false CANH*A 2.865,0.573 3.427,0.906 0.563,0.333 10 false CANL*A 2.729,2.354 3.385,2.646 0.656,0.292 10 false CANH*B 2.833,2.573 3.427,2.979 0.594,0.406 10 false CANL*B 1.802,2.24 2.26,2.438 0.458,0.198 10 false A56 2.177,2.24 2.604,2.458 0.427,0.219 10 false *B*C 2.771,4.052 3.427,4.344 0.656,0.292 10 false CANH*C 2.719,4.271 3.333,4.594 0.615,0.323 10 false CANL*C
*A for 2ZR-FE
*B for 1ZR-FE
*C for 2NZ-FE
*a Front view of wire harness connector
(to ECM)


Disconnect the A40 or A56 ECM connector.


c.

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

Standard Resistance:
for 2ZR-FE
Tester Connection Condition Specified Condition
A40-13 (CANH) - A40-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

for 1ZR-FE
Tester Connection Condition Specified Condition
A56-8 (CANH) - A56-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

for 2NZ-FE
Tester Connection Condition Specified Condition
A56-41 (CANH) - A56-49 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω



Result:
Result Proceed to
OK (for 1ZR-FE) A
OK (for 2ZR-FE) B
OK (for 2NZ-FE) C
NG D



A

REPLACE ECM

Click hereEngine / Hybrid System>1ZR-FE ENGINE CONTROL>ECM>REMOVAL


B

REPLACE ECM

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL


C

REPLACE ECM

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>ECM>REMOVAL


D

4.CHECK FOR OPEN IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
4.CHECK FOR OPEN IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
a.

Reconnect the A40 or A56 ECM connector.


b.
C289288C23
1.51,0.438 1.938,0.771 0.427,0.333 0.948,1.948 0.906,0.708 0.906,0.708 0.781,0.708 true 0.771,2.677 0.917,2.677 0.917,2.677 0.948,2.292 true 1.74,1.958 2.24,0.729 2.24,0.729 2.333,0.729 true 2.031,2.656 1.896,2.656 1.896,2.656 1.74,2.26 true 0.073,0.052 0.385,0.25 0.313,0.198 10 false *a 1.604,0.49 1.917,0.688 0.313,0.198 10 false A39 0.229,0.604 0.844,0.802 0.615,0.198 10 false CANH*b 2.396,0.635 3.01,0.833 0.615,0.198 10 false CANH*c 0.25,2.583 0.865,2.781 0.615,0.198 10 false CANL*b 2.094,2.563 2.708,2.76 0.615,0.198 10 false CANL*c
*a Front view of wire harness connector
(to No. 1 CAN Junction Connector)
*b to No. 2 CAN Junction Connector
*c to ECM


Disconnect the A39 No. 1 CAN junction connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition Connected to
A39-1 (CANH) - A39-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction connector
A39-6 (CANH) - A39-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω ECM



Result:
Result Proceed to
OK A
NG (ECM main line) B
NG (No. 2 CAN junction connector main line) C



A

REPLACE NO. 1 CAN JUNCTION CONNECTOR

B

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 1 CAN JUNCTION CONNECTOR)

C

5.CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR)
5.CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR)
a.

Reconnect the A39 No. 1 CAN junction connector.


b.
C289288C24
1.51,0.438 1.938,0.771 0.427,0.333 1.406,1.938 0.729,0.708 0.729,0.708 0.656,0.708 true 0.677,2.656 0.771,2.656 0.771,2.656 1.427,2.292 true 1.573,1.938 2.24,0.729 2.24,0.729 2.333,0.729 true 2.031,2.656 1.896,2.656 1.896,2.656 1.594,2.292 true 0.073,0.052 0.385,0.25 0.313,0.198 10 false *a 1.594,0.5 1.906,0.698 0.313,0.198 10 false E55 0.094,0.615 0.708,0.813 0.615,0.198 10 false CANH*b 2.396,0.635 3.01,0.833 0.615,0.198 10 false CANH*c 0.125,2.563 0.74,2.76 0.615,0.198 10 false CANL*b 2.094,2.563 2.708,2.76 0.615,0.198 10 false CANL*c
*a Front view of wire harness connector
(to No. 2 CAN Junction Connector)
*b to Combination Meter Assembly
*c to No. 1 CAN Junction Connector


Disconnect the E55 No. 2 CAN junction connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition Connected to
E55-4 (CANH) - E55-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Combination meter assembly
E55-5 (CANH) - E55-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 1 CAN junction connector



Result:
Result Proceed to
OK A
NG (Combination meter assembly main line) B
NG (No. 1 CAN junction connector main line) C



A

REPLACE NO. 2 CAN JUNCTION CONNECTOR

B

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)

C

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)