RM35X0E _57 Power Source / Network _078518 NETWORKING _0381088 CAN COMMUNICATION SYSTEM J

NETWORKING CAN COMMUNICATION SYSTEM Engine Stop and Start ECU Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Engine Stop and Start ECU Communication Stop Mode	Communication stop for "Stop and Go/Start" is indicated on the "Communication Bus Check" screen of the GTS. Click here(201902,201906,_57,_078518,_0381088,RM100000001G6R5,201906,202005,_57,_078518,_0381088,RM100000001IUWS,202005,202107,_57,_078518,_0381088,RM100000001M0XB,202107,202208,_57,_078518,_0381088,RM100000001X4LL,202208,202310,_57,_078518,_0381088,RM10000000257V5,)	· Engine stop and start ECU branch wire 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

0.073,1.229 0.969,1.542 0.896,0.313 10 false N127 0.083,1.396 2.115,1.865 2.031,0.469 10 false No. 7 CAN Junction Connector 1.573,0.375 2.792,0.573 1.219,0.198 10 false 3 1.542,0.906 2.646,1.115 1.104,0.208 10 false 14 5.271,1.573 5.729,1.771 0.458,0.198 10 false N31 5.281,2.125 5.74,2.323 0.458,0.198 10 false N31 5.281,2.677 5.74,2.875 0.458,0.198 10 false N32 5.26,3.229 5.719,3.427 0.458,0.198 10 false N33 5.26,3.792 5.719,3.99 0.458,0.198 10 false N33 5.271,4.344 5.729,4.542 0.458,0.198 10 false N33 5.281,4.875 5.74,5.073 0.458,0.198 10 false N31 5.292,5.344 5.75,5.542 0.458,0.198 10 false N31 5.677,5.365 6.135,5.563 0.458,0.198 10 false GND2 5.677,4.896 6.135,5.094 0.458,0.198 10 false GND1 5.677,4.375 6.135,4.573 0.458,0.198 10 false ACC 5.677,3.813 6.135,4.01 0.458,0.198 10 false IG2 5.656,3.271 6.115,3.469 0.458,0.198 10 false IG1 5.688,2.698 6.146,2.896 0.458,0.198 10 false +B 5.667,2.146 6.125,2.344 0.458,0.198 10 false BIN2 5.667,1.604 6.125,1.802 0.458,0.198 10 false BIN1 5.667,1.042 6.125,1.24 0.458,0.198 10 false CANL 5.656,0.479 6.115,0.677 0.458,0.198 10 false CANH 5.344,1.354 5.802,1.552 0.458,0.198 10 false 3 5.354,1.906 5.813,2.104 0.458,0.198 10 false 1 5.354,2.458 5.813,2.656 0.458,0.198 10 false 1 5.302,3.01 5.76,3.208 0.458,0.198 10 false 21 5.302,3.573 5.76,3.771 0.458,0.198 10 false 18 5.313,4.135 5.771,4.333 0.458,0.198 10 false 19 5.344,4.656 5.802,4.854 0.458,0.198 10 false 8 5.167,5.917 6.99,6.5 1.823,0.583 10 false Engine Stop and Start ECU 5.344,5.125 5.802,5.323 0.458,0.198 10 false 2 4.125,1.417 4.906,1.625 0.781,0.208 10 false BBC-1 4.104,1.958 4.885,2.167 0.781,0.208 10 false BBC-2 4.083,2.531 4.865,2.74 0.781,0.208 10 false EFI NO.3 3.823,3.094 5.063,3.406 1.24,0.313 10 false ECU-IG1 NO.1 3.99,3.635 4.948,3.875 0.958,0.24 10 false METER-IG2 4.031,4.208 5,4.427 0.969,0.219 10 false ECU-ACC 2.052,4.365 3.219,4.615 1.167,0.25 10 false from ACC Relay 1.792,3.781 3.302,4.156 1.51,0.375 10 false from IG2-NO.2 Relay 1.792,3.229 3.26,3.521 1.469,0.292 10 false from IG1 NO.1 Relay 2.281,2.667 3.531,3.156 1.25,0.49 10 false from Battery 2.292,2.156 3.479,2.458 1.188,0.302 10 false from Battery 2.292,1.573 3.5,1.813 1.208,0.24 10 false from Battery 5.26,1.01 5.719,1.208 0.458,0.198 10 false N33 5.26,0.49 5.719,0.688 0.458,0.198 10 false N33 5.292,0.271 5.75,0.469 0.458,0.198 10 false 13 5.302,0.792 5.76,0.99 0.458,0.198 10 false 14

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>HOW TO PROCEED WITH TROUBLESHOOTING201902,201906,_57,_078518,_0381088,RM100000001GYCO,201906,202310,_57,_078518,_0381088,RM100000001WPQJ,

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

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 BATTERY201902,202310,_V1,_081196,_0393338,RM100000001HX6Q,

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE201902,201906,_V1,_081196,_0393338,RM100000001HX6R,201906,202310,_V1,_081196,_0393338,RM100000001JBY9,

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 CHART201902,201906,_V1,_081196,_0393338,RM100000001HX6S,201906,999999,_V1,_081196,_0393338,RM100000001IWEY,

Some parts must be initialized and set when replacing or removing and installing parts.

Click here

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE201902,201906,_V1,_081196,_0393338,RM100000001HX6R,201906,202310,_V1,_081196,_0393338,RM100000001JBY9,

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>DIAGNOSIS SYSTEM201902,201906,_57,_078518,_0381088,RM100000001G6R5,201906,202005,_57,_078518,_0381088,RM100000001IUWS,202005,202107,_57,_078518,_0381088,RM100000001M0XB,202107,202208,_57,_078518,_0381088,RM100000001X4LL,202208,202310,_57,_078518,_0381088,RM10000000257V5,

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 (ENGINE STOP AND START ECU BRANCH WIRE)

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

1.469,0.188 1.885,0.438 0.417,0.25 0.729,1.823 0.844,1.823 0.844,1.823 0.781,1.406 true 1.365,1.813 1.188,1.813 1.188,1.813 0.938,1.406 true 0.188,0.146 0.5,0.302 0.313,0.156 10 false *a 1.552,0.24 1.906,0.396 0.354,0.156 10 false N33 0.354,1.76 0.76,1.906 0.406,0.146 10 false CANH 1.438,1.76 1.844,1.906 0.406,0.146 10 false CANL

*a	Front view of wire harness connector (to Engine Stop and Start ECU)

Disconnect the N33 engine stop and start ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N33-13 (CANH) - N33-14 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Result:

Proceed to
OK
NG

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

Disconnect the N31, N32 engine stop and start ECU connectors.

1,0.188 1.417,0.427 0.417,0.24 3.323,0.156 3.74,0.396 0.417,0.24 5.76,0.104 6.177,0.344 0.417,0.24 0.344,0.885 0.438,1.417 0.438,1.417 0.604,1.417 true 3.969,1.042 4.135,1.385 4.135,1.385 4.302,1.385 true 5.688,1.083 5.271,1.469 5.271,1.469 5.083,1.469 true 6.25,1.104 6.25,1.583 6.25,1.583 6.417,1.583 true 3.167,0.833 2.917,0.417 2.917,0.417 2.75,0.417 true 3.167,1.083 2.958,1.5 2.958,1.5 2.75,1.5 true 5.813,1.094 5.813,1.594 5.813,1.594 5.656,1.594 true 4.021,0.771 4.146,0.469 4.146,0.469 4.313,0.469 true 0.063,0.042 0.375,0.24 0.313,0.198 10 false *a 1.094,0.229 1.51,0.417 0.417,0.188 10 false N32 3.427,0.208 3.792,0.406 0.365,0.198 10 false N31 5.833,0.146 6.198,0.354 0.365,0.208 10 false N33 0.656,1.365 0.969,1.563 0.313,0.198 10 false +B 4.823,1.385 5.302,1.583 0.479,0.198 10 false IG2 4.354,1.302 4.833,1.5 0.479,0.198 10 false GND1 2.417,0.333 2.896,0.531 0.479,0.198 10 false BIN2 2.417,1.417 2.896,1.615 0.479,0.198 10 false BIN1 6.469,1.5 6.948,1.698 0.479,0.198 10 false IG1 5.344,1.51 5.823,1.708 0.479,0.198 10 false ACC 4.375,0.406 4.854,0.604 0.479,0.198 10 false GND2

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
N31-2 (GND2) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω
N31-8 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
N32-1 (+B) - Body ground	Always	9.5 to 14 V
N31-1 (BIN2) - Body ground	Always	9.5 to 14 V
N31-3 (BIN1) - Body ground	Always	9.5 to 14 V
N33-21 (IG1) - Body ground	Ignition switch ON	9.5 to 14 V
N33-21 (IG1) - Body ground	Ignition switch off	Below 1 V
N33-18 (IG2) - Body ground	Ignition switch ON	9.5 to 14 V
N33-18 (IG2) - Body ground	Ignition switch off	Below 1 V
N33-19 (ACC) - Body ground	Ignition switch ACC	9.5 to 14 V
N33-19 (ACC) - Body ground	Ignition switch off	Below 1 V

Result:

Proceed to
OK
NG

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL201902,201906,_51,_078825,_0383278,RM100000001G9YA,201906,202310,_51,_078825,_0383278,RM100000001IZVW,

REPAIR OR REPLACE HARNESS OR CONNECTOR