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)) Millimeter Wave Radar Sensor Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Millimeter Wave Radar Sensor Communication Stop Mode	Any of the following conditions are met: · Communication stop for "Front Radar" is indicated on the "Communication Bus Check" screen of the GTS. Click here(202304,999999,_57,_080743,_0598517,RM100000002B6UY,) · Communication stop history for "Front Radar" is indicated on the "Communication Bus Check (Detail)" screen of the GTS. (The Lost Communication Time value for "Front Radar" is 6 or more.) Click here(202304,999999,_57,_080743,_0598517,RM100000002B6UY,) · Communication system DTCs (DTCs that start with U) that correspond to "Millimeter Wave Radar Sensor Communication Stop Mode" in "DTC Combination Table" are output. Click here(202304,202403,_57,_080743,_0598517,RM100000002B6V1,202403,999999,_57,_080743,_0598517,RM100000002JOVB,)	· Millimeter wave radar sensor assembly branch line or connector · Power source circuit of millimeter wave radar sensor assembly · Millimeter wave radar sensor assembly ground circuit · Millimeter wave radar sensor assembly

WIRING DIAGRAM

0.229,1.625 0.688,1.823 0.458,0.198 10 false I172 0.563,1.625 2.688,1.958 2.125,0.333 10 false No. 1 CAN Junction Connector 5.375,1.125 5.833,1.323 0.458,0.198 10 false 2 5.385,0.542 5.844,0.74 0.458,0.198 10 false 3 5.698,0.667 6.208,0.896 0.51,0.229 10 false CA2H 5.698,1.271 6.188,1.5 0.49,0.229 10 false CA2L 5.677,2.281 6.135,2.479 0.458,0.198 10 false IGB 5.396,2.156 5.854,2.354 0.458,0.198 10 false 8 5.667,3.271 6.323,3.542 0.656,0.271 10 false SGND 5.385,3.156 5.844,3.354 0.458,0.198 10 false 1 5.323,3.885 5.781,4.083 0.458,0.198 10 false A1 5.583,3.885 7.021,4.427 1.438,0.542 10 false Millimeter Wave Radar Sensor Assembly 1.063,2.271 3.292,2.635 2.229,0.365 10 false from Engine Stop and Start ECU 1.802,0.552 2.26,0.75 0.458,0.198 10 false 4 1.76,1.146 2.219,1.344 0.458,0.198 10 false 15

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 TROUBLESHOOTING202304,999999,_57,_080743,_0598517,RM100000002B6UW,

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 BATTERY202304,202502,_V1,_143216,_0598315,RM100000002B3MI,202502,999999,_V1,_143216,_0598315,RM100000002RP07,

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 CHART202304,999999,_V1,_143216,_0598315,RM100000002B3MJ,

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

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE202304,202307,_V1,_143216,_0598316,RM100000002B3MM,202307,202502,_V1,_143216,_0598316,RM100000002CVSW,202502,999999,_V1,_143216,_0598316,RM100000002ROZH,

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 SYSTEM202304,202307,_57,_080743,_0598517,RM100000002B6V0,202307,202403,_57,_080743,_0598517,RM100000002D3A3,202403,202502,_57,_080743,_0598517,RM100000002JOVA,202502,999999,_57,_080743,_0598517,RM100000002RPYX,

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 (MILLIMETER WAVE RADAR SENSOR ASSEMBLY BRANCH LINE)

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

Disconnect the A1 millimeter wave radar sensor assembly connector.

0.333,1.052 0.698,1.26 0.365,0.208 1.427,0.229 1.594,0.229 1.594,0.229 1.594,1.063 true 1.948,0.229 1.781,0.229 1.781,0.229 1.781,1.063 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 0.427,1.073 0.823,1.292 0.396,0.219 10 false A1 2.042,0.146 2.5,0.479 0.458,0.333 10 false CA2H 1.042,0.156 1.417,0.406 0.375,0.25 10 false CA2L

*a	Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A1-3 (CA2H) - A1-2 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Result:

Result
OK
NG

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

0.333,1.052 0.698,1.26 0.365,0.208 1.26,0.229 1.427,0.229 1.427,0.229 1.427,1.063 true 2.135,1.958 1.969,1.958 1.969,1.958 1.969,1.375 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 0.438,1.083 0.833,1.302 0.396,0.219 10 false A1 2.219,1.875 2.594,2.063 0.375,0.188 10 false IGB 0.792,0.156 1.281,0.427 0.49,0.271 10 false SGND

*a	Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A1-1 (SGND) - 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
A1-8 (IGB) - Body ground	Ignition switch ON	11 to 14 V

Result:

Result
OK
NG

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Click hereADAS / AD>ADVANCED DRIVER ASSISTANCE SYSTEM>MILLIMETER WAVE RADAR SENSOR (for NR Series Engine)>REMOVAL202304,999999,_95,_139716,_0584842,RM1000000029I3D,

GO TO STOP AND START SYSTEM (FOR BACKUP BOOST CONVERTER CIRCUIT)

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>Backup Boost Converter Circuit202304,202307,_51,_080774,_0393362,RM100000002MKFL,202307,202403,_51,_080774,_0393362,RM100000002CJ03,202403,202502,_51,_080774,_0393362,RM100000002KO13,202502,999999,_51,_080774,_0393362,RM100000002RQ23,