RM3660EC _57 Power Source / Network _080743 NETWORKING _0598517 CAN COMMUNICATION SYSTEM(for Gasoline Model (NR Series)) J

NETWORKING  CAN COMMUNICATION SYSTEM(for Gasoline Model (NR Series))  Engine Stop and Start ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Engine Stop and Start ECU Communication Stop Mode Any of the following conditions are met:
·

Communication stop for "Stop and Go/Start" is indicated on the "Communication Bus Check" screen of the GTS.

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·

Communication stop history for "Stop and Go/Start" is indicated on the "Communication Bus Check (Detail)" screen of the GTS. (The Lost Communication Time value for "Stop and Go/Start" is 6 or more.)

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·

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

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·

Engine stop and start ECU branch line or connector

·

Power source circuit of engine stop and start ECU

·

Engine stop and start ECU ground circuit

·

Engine stop and start ECU



WIRING DIAGRAM

C416554E01
0.333,1.792 0.792,1.99 0.458,0.198 10 false I95 0.615,1.792 3.021,2.156 2.406,0.365 10 false No. 4 CAN Junction Connector 1.719,1.229 2.177,1.427 0.458,0.198 10 false 19 1.771,0.677 2.229,0.875 0.458,0.198 10 false 8 5.281,0.563 5.74,0.76 0.458,0.198 10 false 13 5.281,0.792 5.74,0.99 0.458,0.198 10 false I58 5.281,1.125 5.74,1.323 0.458,0.198 10 false 14 5.271,1.344 5.729,1.542 0.458,0.198 10 false I58 5.667,0.802 6.177,1.042 0.51,0.24 10 false CANH 5.667,1.354 6.208,1.573 0.542,0.219 10 false CANL 5.667,2.969 6.125,3.167 0.458,0.198 10 false IG1 5.271,2.958 5.729,3.156 0.458,0.198 10 false I58 5.292,2.719 5.75,2.917 0.458,0.198 10 false 21 5.667,3.552 6.125,3.75 0.458,0.198 10 false IG2 5.292,3.552 5.75,3.75 0.458,0.198 10 false I58 5.281,3.323 5.74,3.521 0.458,0.198 10 false 18 5.656,4.74 6.115,4.938 0.458,0.198 10 false BIN1 5.188,4.74 5.646,4.938 0.458,0.198 10 false A123 5.323,4.51 5.781,4.708 0.458,0.198 10 false 3 5.208,5.271 5.667,5.469 0.458,0.198 10 false A123 5.313,5.042 5.771,5.24 0.458,0.198 10 false 1 5.656,5.896 6.167,6.125 0.51,0.229 10 false GND1 5.219,5.896 5.677,6.094 0.458,0.198 10 false A123 5.323,5.667 5.781,5.865 0.458,0.198 10 false 8 5.656,6.521 6.167,6.75 0.51,0.229 10 false GND2 5.219,6.51 5.677,6.708 0.458,0.198 10 false A123 5.313,6.281 5.771,6.479 0.458,0.198 10 false 2 5.292,7.115 7.115,7.604 1.823,0.49 10 false Engine Stop and Start ECU 3.865,5.115 4.833,5.344 0.969,0.229 10 false BBC NO. 2 3.708,3.406 4.979,3.688 1.271,0.281 10 false ECU-IG2 NO. 3 3.698,2.823 4.917,3.146 1.219,0.323 10 false ECU-IG1 NO. 2 3.885,2.198 4.76,2.438 0.875,0.24 10 false EFI NO. 2 1.667,2.354 3.635,2.635 1.969,0.281 10 false from EFI-MAIN Relay 1.656,2.938 3.292,3.281 1.635,0.344 10 false from IG1-NO. 1 Relay 1.958,4.125 3.385,4.5 1.427,0.375 10 false from ACC Relay 3.875,4.563 4.833,4.865 0.958,0.302 10 false BBC NO. 1 2.167,4.719 3.167,5.042 1,0.323 10 false from Battery 5.208,2.365 5.667,2.563 0.458,0.198 10 false A124 5.323,2.135 5.781,2.333 0.458,0.198 10 false 1 5.656,2.375 6.115,2.573 0.458,0.198 10 false +B 5.656,5.271 6.115,5.469 0.458,0.198 10 false BIN2 1.625,3.531 3.24,3.917 1.615,0.385 10 false from IG2-NO. 2 Relay 5.646,4.167 6.104,4.365 0.458,0.198 10 false ACC 5.281,4.146 5.74,4.344 0.458,0.198 10 false I58 5.271,3.917 5.729,4.115 0.458,0.198 10 false 19 3.885,3.979 4.792,4.25 0.906,0.271 10 false ECU-ACC

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 Gasoline Model (NR Series))>HOW TO PROCEED WITH TROUBLESHOOTING

·

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 (-) auxiliary 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

·

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 Gasoline Model (NR Series))>DIAGNOSIS SYSTEM

·

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



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 LINES (ENGINE STOP AND START ECU BRANCH LINE)
a.

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


b.

Disconnect the I58 engine stop and start ECU connector.


c.
C382011C04
1.479,0.448 1.958,0.729 0.479,0.281 0.698,2.167 0.698,2.75 0.698,2.75 0.865,2.75 true 0.542,2.167 0.542,3 0.542,3 0.708,3 true 0.125,0.115 0.438,0.313 0.313,0.198 10 false *a 1.635,0.51 2.063,0.76 0.427,0.25 10 false I58 0.958,2.667 1.656,2.885 0.698,0.219 10 false CANL 0.792,2.927 1.49,3.146 0.698,0.219 10 false CANH
*a Front view of wire harness connector
(to Engine Stop and Start ECU)


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

Standard Resistance:
Tester Connection Condition Specified Condition
I58-13 (CANH) - I58-14 (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 (ENGINE STOP AND START ECU)

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

Disconnect the A123 and A124 engine stop and start ECU connectors.


b.

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

C388157C13
5.469,0.146 5.979,0.417 0.51,0.271 3,0.146 3.438,0.417 0.438,0.271 0.823,0.146 1.26,0.417 0.438,0.271 0.552,1.25 0.552,0.667 0.552,0.667 0.719,0.667 true 1.479,1.24 1.479,0.583 1.479,0.583 1.646,0.583 true 0.542,1.698 0.542,2.198 0.542,2.198 0.708,2.198 true 1.469,1.708 1.469,2.208 1.469,2.208 1.635,2.208 true 2.208,1.375 2.208,0.865 2.208,0.865 2.375,0.865 true 5.573,1.74 5.573,2.49 5.573,2.49 5.406,2.49 true 5.448,1.729 5.448,2.229 5.448,2.229 5.281,2.229 true 6.042,1.729 6.042,2.229 6.042,2.229 6.208,2.229 true 0.104,0.063 0.781,0.385 0.677,0.323 10 false *a 0.896,0.198 1.573,0.521 0.677,0.323 10 false A123 3.073,0.198 3.75,0.521 0.677,0.323 10 false A124 5.635,0.208 6.313,0.531 0.677,0.323 10 false I58 0.823,0.583 1.5,0.906 0.677,0.323 10 false BIN2 1.729,0.5 2.406,0.823 0.677,0.323 10 false GND2 1.74,2.125 2.417,2.448 0.677,0.323 10 false GND1 0.813,2.115 1.49,2.438 0.677,0.323 10 false BIN1 2.479,0.781 3.156,1.104 0.677,0.323 10 false +B 4.979,2.146 5.656,2.469 0.677,0.323 10 false IG2 5.042,2.417 5.719,2.74 0.677,0.323 10 false ACC 6.302,2.146 6.656,2.448 0.354,0.302 10 false IG1
*a Front view of wire harness connector
(to Engine Stop and Start ECU) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
A123-2 (GND2) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
A123-8 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



c.

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


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A123-1 (BIN2) - Body ground Always 11 to 14 V
A123-3 (BIN1) - Body ground Always 11 to 14 V
A124-1 (+B) - Body ground Ignition switch ON 11 to 14 V
I58-19 (ACC) - Body ground Ignition switch ACC 11 to 14 V
I58-18 (IG2) - Body ground Ignition switch ON 11 to 14 V
I58-21 (IG1) - Body ground Ignition switch ON 11 to 14 V



Result:
Result
OK
NG



OK

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)