NETWORKING  CAN COMMUNICATION SYSTEM  Check CAN Bus Lines for Short Circuit  


DESCRIPTION

There may be a short circuit between the V bus main lines and/or CAN branch lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

Symptom Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.
·

Short in CAN main bus lines

·

Short in CAN branch lines

·

Combination meter assembly

·

Power steering ECU assembly

·

Main body ECU (multiplex network body ECU)

·

Airbag ECU assembly

·

ECM

·

Skid control ECU (brake actuator assembly)*1

·

Air conditioning amplifier assembly

·

Steering sensor*2

·

Certification ECU (smart key ECU assembly)*3

·

No. 1 CAN junction connector

·

No. 2 CAN junction connector



·

*1: w/ ABS

·

*2: w/ VSC

·

*3: w/ Smart Entry and Start System


WIRING DIAGRAM

C377570E01
0.177,0.094 1.281,0.333 1.104,0.24 12 false V Bus: 5.458,0.219 6.719,0.552 1.26,0.333 10 false x: Suspected Area 3.354,0.281 4.01,0.552 0.656,0.271 10 false 120 Ω 0.427,0.656 1.083,0.927 0.656,0.271 10 false E43 0.75,0.656 2.667,0.979 1.917,0.323 10 false Combination Meter Assembly 2.719,0.865 3.375,1.135 0.656,0.271 10 false CANL 4.063,0.854 4.719,1.125 0.656,0.271 10 false CANH 2.969,1.073 3.26,1.365 0.292,0.292 10 false 31 2.938,1.292 3.229,1.583 0.292,0.292 10 false W 2.979,1.51 3.271,1.802 0.292,0.292 10 false 15 4.031,1.073 4.323,1.365 0.292,0.292 10 false 32 4.083,1.292 4.375,1.583 0.292,0.292 10 false LG 4.042,1.5 4.333,1.792 0.292,0.292 10 false 4 4.333,1.698 4.99,1.969 0.656,0.271 10 false E55 4.646,1.698 6.625,1.969 1.979,0.271 10 false No. 2 CAN Junction Connector 0.063,7.302 0.719,7.573 0.656,0.271 10 false E110 0.438,7.302 2.26,7.708 1.823,0.406 10 false Certification ECU (Smart Key ECU Assembly)*4 5.833,5.208 6.49,5.479 0.656,0.271 10 false CANH 1.01,7.031 1.667,7.302 0.656,0.271 10 false CANL 1.469,6.542 2.125,6.813 0.656,0.271 10 false 14 1.469,7.031 2.125,7.302 0.656,0.271 10 false 15 2.083,6.5 2.385,6.792 0.302,0.292 10 false R 2.052,7.104 2.354,7.396 0.302,0.292 10 false W 2.719,6.531 3.375,6.802 0.656,0.271 10 false 6 2.656,7.021 3.313,7.292 0.656,0.271 10 false 17 2.958,7.573 3.615,7.844 0.656,0.271 10 false 16 4.042,7.573 4.698,7.844 0.656,0.271 10 false 5 5.406,5.979 5.844,6.25 0.438,0.271 10 false E115 5.781,5.979 7.021,6.271 1.24,0.292 10 false Steering Sensor*3 0.99,6.563 1.646,6.833 0.656,0.271 10 false CANH 5.854,5.698 6.51,5.969 0.656,0.271 10 false CANL 5.646,5.708 5.927,5.948 0.281,0.24 10 false 2 5.656,5.219 6.313,5.49 0.656,0.271 10 false 3 4.313,5.219 4.969,5.49 0.656,0.271 10 false 10 4.323,5.708 4.667,5.979 0.344,0.271 10 false 21 4.927,5.177 5.229,5.469 0.302,0.292 10 false SB 4.958,5.792 5.26,6.083 0.302,0.292 10 false W 2.656,2.063 2.948,2.354 0.292,0.292 10 false 12 2.729,1.594 3.021,1.885 0.292,0.292 10 false 1 2.073,1.521 2.365,1.813 0.292,0.292 10 false V 2.042,2.146 2.333,2.438 0.292,0.292 10 false W 1.469,1.594 1.76,1.885 0.292,0.292 10 false 13 1.479,2.063 1.771,2.354 0.292,0.292 10 false 22 1.479,3.302 1.771,3.594 0.292,0.292 10 false 14 1.479,3.781 1.771,4.073 0.292,0.292 10 false 13 2.052,3.844 2.344,4.135 0.292,0.292 10 false W 2.073,3.26 2.365,3.552 0.292,0.292 10 false G 2.719,3.292 3.01,3.583 0.292,0.292 10 false 8 2.667,3.781 2.958,4.073 0.292,0.292 10 false 19 2.75,4.979 3.042,5.271 0.292,0.292 10 false 2 2.677,5.458 2.969,5.75 0.292,0.292 10 false 13 2.438,5.521 2.729,5.813 0.292,0.292 10 false W 2.458,4.917 2.75,5.208 0.292,0.292 10 false Y 4.323,4.25 4.615,4.542 0.292,0.292 10 false 22 4.323,3.729 4.615,4.021 0.292,0.292 10 false 11 4.323,2.667 4.615,2.958 0.292,0.292 10 false 20 4.344,2.146 4.635,2.438 0.292,0.292 10 false 9 4.938,2.125 5.26,2.417 0.323,0.292 10 false GR 4.958,2.719 5.25,3.01 0.292,0.292 10 false W 4.938,3.667 5.229,3.958 0.292,0.292 10 false BE 4.958,4.292 5.25,4.583 0.292,0.292 10 false W 5.656,4.208 5.948,4.5 0.292,0.292 10 false 14 5.563,3.729 5.854,4.021 0.292,0.292 10 false 6 5.635,2.646 5.927,2.938 0.292,0.292 10 false 8 5.646,2.177 5.938,2.469 0.292,0.292 10 false 7 5.854,2.167 6.51,2.438 0.656,0.271 10 false CANH 5.854,2.667 6.51,2.938 0.656,0.271 10 false CANL 5.458,2.906 6.115,3.177 0.656,0.271 10 false E40 5.771,2.906 7.063,3.313 1.292,0.406 10 false Power Steering ECU Assembly 5.792,3.833 6.448,4.104 0.656,0.271 10 false CANH 5.896,4.094 6.552,4.365 0.656,0.271 10 false CANL 5.906,4.406 6.563,4.677 0.656,0.271 10 false E13 6.208,4.406 6.865,4.677 0.656,0.271 10 false DLC3 0.063,2.333 0.719,2.604 0.656,0.271 10 false E14 0.99,1.594 1.646,1.865 0.656,0.271 10 false CANH 1.01,2.063 1.667,2.333 0.656,0.271 10 false CANL 0.365,2.333 1.823,2.635 1.458,0.302 10 false Airbag ECU Assembly 0.99,3.302 1.646,3.573 0.656,0.271 10 false CANH 1.01,3.792 1.667,4.063 0.656,0.271 10 false CANL 0.063,4.052 0.719,4.323 0.656,0.271 10 false E31 0.365,4.052 2.01,4.49 1.646,0.438 10 false Main Body ECU (Multiplex Network Body ECU) 0.031,5.729 1.583,6.271 1.552,0.542 10 false Air Conditioning Amplifier Assembly 0.99,4.969 1.646,5.24 0.656,0.271 10 false CANH 1.01,5.469 1.667,5.74 0.656,0.271 10 false CANL 1.479,5.083 1.844,5.333 0.365,0.25 10 false E102 1.479,5.344 1.844,5.594 0.365,0.25 10 false E102 1.99,5.083 2.354,5.333 0.365,0.25 10 false E7 1.979,5.344 2.344,5.594 0.365,0.25 10 false E7 1.51,4.906 1.875,5.156 0.365,0.25 10 false 11*1 1.49,5.552 1.854,5.802 0.365,0.25 10 false 12*1 1.958,4.896 2.323,5.146 0.365,0.25 10 false 8*2 1.958,5.552 2.323,5.802 0.365,0.25 10 false 9*2 4.396,6.521 7.073,6.781 2.677,0.26 10 false *1: for Automatic Air Conditioning System 4.396,6.854 7,7.115 2.604,0.26 10 false *2: for Manual Air Conditioning System 4.396,7.208 7,7.469 2.604,0.26 10 false *3: w/ VSC 4.396,7.573 7,7.833 2.604,0.26 10 false *4: w/ Smart Entry and Start System 0.781,8.24 3.385,8.5 2.604,0.26 10 false : CAN Main Bus Line (CANH) 0.781,8.563 2.833,8.781 2.052,0.219 10 false : CAN Main Bus Line (CANL) 3.927,8.229 6.531,8.49 2.604,0.26 10 false : CAN Branch Line (CANH) 3.927,8.531 6.531,8.792 2.604,0.26 10 false : CAN Branch Line (CANL)

C377900E01
0.104,0.094 0.875,0.438 0.771,0.344 12 false V Bus: 4.896,0.313 6.385,0.635 1.49,0.323 10 false x: Suspected Area 2.927,0.469 3.208,0.719 0.281,0.25 10 false W 4.042,0.479 4.323,0.729 0.281,0.25 10 false L 4.708,1.125 4.99,1.375 0.281,0.25 10 false V 4.688,1.719 4.969,1.969 0.281,0.25 10 false W 4.313,1.156 4.594,1.406 0.281,0.25 10 false 5 4.281,1.656 4.563,1.906 0.281,0.25 10 false 16 4.01,0.708 4.292,0.958 0.281,0.25 10 false 1 2.938,0.729 3.219,0.979 0.281,0.25 10 false 12 2.948,2.458 3.229,2.708 0.281,0.25 10 false 17 4,2.458 4.281,2.708 0.281,0.25 10 false 6 4.031,2.844 4.313,3.094 0.281,0.25 10 false B 2.917,2.844 3.198,3.094 0.281,0.25 10 false W 5.115,1.531 5.5,1.771 0.385,0.24 10 false A48 5.115,1.292 5.5,1.531 0.385,0.24 10 false A48 5.49,1.281 5.875,1.521 0.385,0.24 10 false A64 5.5,1.531 5.885,1.771 0.385,0.24 10 false A64 5.104,1.094 5.49,1.333 0.385,0.24 10 false 25*1 5.479,1.094 5.865,1.333 0.385,0.24 10 false 25*2 5.094,1.729 5.479,1.969 0.385,0.24 10 false 14*1 5.448,1.729 5.833,1.969 0.385,0.24 10 false 14*2 5.875,1.167 6.365,1.396 0.49,0.229 10 false CANH 5.885,1.646 6.375,1.875 0.49,0.229 10 false CANL 5.594,1.906 7.146,2.438 1.552,0.531 10 false Skid Control ECU (Brake Actuator Assembly) 3.802,3.438 4.188,3.677 0.385,0.24 10 false A40 3.802,3.625 4.188,3.865 0.385,0.24 10 false A56 3.042,3.427 3.427,3.667 0.385,0.24 10 false A40 3.802,3.823 4.188,4.063 0.385,0.24 10 false A56 3.052,3.625 3.438,3.865 0.385,0.24 10 false A56 3.052,3.813 3.438,4.052 0.385,0.24 10 false A56 4.167,3.813 4.552,4.052 0.385,0.24 10 false 41*5 4.156,3.438 4.542,3.677 0.385,0.24 10 false 13*3 4.167,3.625 4.552,3.865 0.385,0.24 10 false 8*4 2.656,3.427 3.042,3.667 0.385,0.24 10 false 26*3 2.74,3.625 3.125,3.865 0.385,0.24 10 false 9*4 2.667,3.823 3.052,4.063 0.385,0.24 10 false 49*5 4.01,4.031 4.5,4.26 0.49,0.229 10 false CANH 2.74,4.031 3.229,4.26 0.49,0.229 10 false CANL 3.375,4.656 3.865,4.885 0.49,0.229 10 false 120 Ω 4.573,4.302 5.063,4.531 0.49,0.229 10 false ECM 0.563,2.552 1.708,2.844 1.146,0.292 10 false *1: w/ ABS 0.563,2.875 1.708,3.167 1.146,0.292 10 false *2: w/ VSC 0.563,3.208 1.708,3.5 1.146,0.292 10 false *3: for 2ZR-FE 0.563,3.542 1.708,3.833 1.146,0.292 10 false *4: for 1ZR-FE 0.563,3.875 1.708,4.167 1.146,0.292 10 false *5: for 2NZ-FE 0.927,4.948 2.958,5.198 2.031,0.25 10 false : CAN Main Bus Line (CANH) 0.927,5.354 2.958,5.604 2.031,0.25 10 false : CAN Main Bus Line (CANL) 4.063,4.969 6.094,5.219 2.031,0.25 10 false : CAN Branch Line (CANH) 4.063,5.375 6.094,5.625 2.031,0.25 10 false : CAN Branch Line (CANL) 0.51,1.365 0.865,1.563 0.354,0.198 10 false A39 0.833,1.365 2.833,1.656 2,0.292 10 false No. 1 CAN Junction Connector

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



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 SHORT IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)
a.

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


b.
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.


c.

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

2.CHECK FOR SHORT IN CAN BUS LINES (ECM - NO. 1 CAN JUNCTION CONNECTOR)
2.CHECK FOR SHORT 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>1ZR-FE ENGINE CONTROL>ECM>REMOVAL


C

REPLACE ECM

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


D

3.CHECK FOR SHORT IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
3.CHECK FOR SHORT IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
a.

Reconnect the A40 or A56 ECM connector.


b.
C289288C25
1.51,0.146 1.938,0.479 0.427,0.333 0.948,1.948 0.854,0.708 0.854,0.708 0.729,0.708 true 0.646,2.708 0.792,2.708 0.792,2.708 0.969,2.292 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 1.573,1.948 1.167,0.479 1.167,0.479 1.052,0.479 true 1.344,2.885 1.479,2.885 1.479,2.885 1.583,2.271 true 0.073,0.052 0.385,0.25 0.313,0.198 10 false *a 1.594,0.208 1.906,0.406 0.313,0.198 10 false A39 0.177,0.604 0.792,0.802 0.615,0.198 10 false CANH*b 2.396,0.635 3.01,0.833 0.615,0.198 10 false CANH*d 0.125,2.604 0.74,2.802 0.615,0.198 10 false CANL*b 2.094,2.563 2.708,2.76 0.615,0.198 10 false CANL*d 0.51,0.375 1.125,0.573 0.615,0.198 10 false CANH*c 0.823,2.792 1.438,2.99 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 Skid Control ECU (Brake Actuator Assembly)
(w/ ABS)
*d 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
A39-5 (CANH) - A39-16 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Skid control ECU (brake actuator assembly)*
A39-6 (CANH) - A39-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω ECM


*: w/ ABS



Result:
Result Proceed to
OK A
NG (No. 2 CAN junction connector main lines) B
NG (ECU or sensor branch lines) C
NG (ECM main lines) D



A

REPLACE NO. 1 CAN JUNCTION CONNECTOR

B

4.CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR)

C

5.CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR)

D

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

4.CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR)
a.

Reconnect the A39 No. 1 CAN junction connector.


b.

Disconnect the E55 No. 2 CAN junction connector.

C361504C11
3.167,0.167 3.615,0.438 0.448,0.271 2.031,1.198 2.281,1.198 2.281,1.198 2.698,2.115 true 2.156,0.948 2.406,0.948 2.406,0.948 2.823,2.115 true 2.49,0.625 2.74,0.625 2.74,0.625 3.073,2.125 true 2.708,0.448 2.958,0.448 2.958,0.448 3.208,2.115 true 4.177,0.438 3.927,0.438 3.927,0.438 3.344,2.104 true 4.469,1.031 4.219,1.031 4.219,1.031 3.719,2.115 true 4.615,1.365 4.365,1.365 4.365,1.365 3.865,2.115 true 2.125,2.656 2.375,2.656 2.375,2.656 2.708,2.406 true 2.25,2.823 2.5,2.823 2.5,2.823 2.833,2.406 true 2.5,3.167 2.75,3.167 2.75,3.167 3.083,2.417 true 2.635,3.333 2.885,3.333 2.885,3.333 3.219,2.417 true 4.646,2.74 4.396,2.74 4.396,2.74 3.979,2.406 true 4.531,2.906 4.281,2.906 4.281,2.906 3.865,2.406 true 4.313,3.073 4.063,3.073 4.063,3.073 3.729,2.406 true 4.625,1.646 4.375,1.646 4.375,1.646 3.979,2.135 true 3.906,3.583 3.656,3.583 3.656,3.583 3.333,2.406 true 4.438,0.698 4.188,0.698 4.188,0.698 3.604,2.115 true 4.094,3.313 3.844,3.313 3.844,3.313 3.594,2.396 true 0.219,0.156 0.531,0.354 0.313,0.198 10 false *a 3.271,0.219 3.583,0.417 0.313,0.198 10 false E55 1.458,1.115 2.188,1.365 0.729,0.25 10 false CANH*b 1.604,0.875 2.333,1.125 0.729,0.25 10 false CANH*c 1.927,0.552 2.656,0.802 0.729,0.25 10 false CANH*d 2.135,0.344 2.865,0.594 0.729,0.25 10 false CANH*e 4.25,0.365 4.979,0.615 0.729,0.25 10 false CANH*f 4.552,0.958 5.281,1.208 0.729,0.25 10 false CANH*h 4.719,1.281 5.448,1.531 0.729,0.25 10 false CANH*i 1.583,2.583 2.313,2.833 0.729,0.25 10 false CANL*b 1.708,2.74 2.438,2.99 0.729,0.25 10 false CANL*c 1.969,3.094 2.698,3.344 0.729,0.25 10 false CANL*d 2.094,3.25 2.823,3.5 0.729,0.25 10 false CANL*e 4.406,2.979 5.135,3.229 0.729,0.25 10 false CANL*h 4.615,2.813 5.344,3.063 0.729,0.25 10 false CANL*i 4.719,2.646 5.448,2.896 0.729,0.25 10 false CANL*j 4.729,1.573 5.458,1.823 0.729,0.25 10 false CANH*j 3.99,3.5 4.646,3.698 0.656,0.198 10 false CANL*f 4.531,0.615 5.26,0.865 0.729,0.25 10 false CANH*g 4.167,3.229 4.896,3.479 0.729,0.25 10 false CANL*g
*a Front view of wire harness connector
(to No. 2 CAN Junction Connector) 		*b to Airbag ECU Assembly
*c to Air Conditioning Amplifier Assembly *d to Combination Meter Assembly
*e to No. 1 CAN Junction Connector *f to Certification ECU (Smart Key ECU Assembly)
(w/ Smart Entry and Start System)
*g to Main Body ECU (Multiplex Network Body ECU) *h to Power Steering ECU Assembly
*i to Steering Sensor
(w/ VSC) 		*j to DLC3



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition Connected to
E55-1 (CANH) - E55-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Airbag ECU assembly
E55-2 (CANH) - E55-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Air conditioning amplifier assembly
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
E55-6 (CANH) - E55-17 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Certification ECU (smart key ECU assembly)*1
E55-8 (CANH) - E55-19 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Main body ECU (multiplex network body ECU)
E55-9 (CANH) - E55-20 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Power steering ECU assembly
E55-10 (CANH) - E55-21 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Steering sensor*2
E55-11 (CANH) - E55-22 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher DLC3


·

*1: w/ Smart Entry and Start System

·

*2: w/ VSC



Result:
Result Proceed to
OK A
NG (No. 1 CAN junction connector main lines) B
NG (ECU or sensor branch lines) C
NG (DLC3 branch lines) D
NG (Combination meter assembly main lines) E



A

REPLACE NO. 2 CAN JUNCTION CONNECTOR

B

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

C

5.CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR)

D

REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3

E

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

5.CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR)
a.

Reconnect all wire harness connectors.


b.

Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>TERMINALS OF ECU


c.
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 54 to 69 Ω


HINT:

If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.



Result:
Result
OK
NG



OK

REPLACE CORRESPONDING ECU OR SENSOR

NG

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR