RM38T0EC _57 Power Source / Network _104409 NETWORKING _0606038 CAN COMMUNICATION SYSTEM(for HEV Model) J

NETWORKING CAN COMMUNICATION SYSTEM(for HEV Model) Millimeter Wave Radar Sensor Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Millimeter Wave Radar Sensor Communication Stop Mode	Communication stop for "Front Radar" is indicated on the "Communication Bus Check" screen of the GTS. Click here(202307,999999,_57,_104409,_0606038,RM100000002C0LE,)	· Millimeter wave radar sensor assembly connector · Power source circuit of millimeter wave radar sensor assembly · Millimeter wave radar sensor assembly ground circuit · Millimeter wave radar sensor assembly

WIRING DIAGRAM

3.938,1.052 5.125,1.271 1.188,0.219 10 false ECU-IGR NO. 1 1.677,0.885 3.104,1.156 1.427,0.271 10 false from IGR NO. 1 Relay 5.25,2.219 6.667,2.615 1.417,0.396 10 false Millimeter Wave Radar Sensor Assembly 5.26,2.052 5.74,2.292 0.479,0.24 10 false A181 5.552,0.885 6.021,1.25 0.469,0.365 10 false IGB 5.552,1.667 6.021,2.031 0.469,0.365 10 false SGND 5.323,0.792 5.646,1.052 0.323,0.26 10 false 1 5.313,1.573 5.781,1.938 0.469,0.365 10 false 5

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 HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING202307,999999,_57,_104409,_0606038,RM100000002C0LC,

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 (-) auxiliary battery terminal and leave the vehicle for 10 minute 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 BATTERY202307,999999,_V1,_106911,_0485800,RM100000002CEKY,

When disconnecting and reconnecting the auxiliary battery.

HINT:: When disconnecting and reconnecting the auxiliary 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 CHART202307,999999,_V1,_106911,_0485800,RM100000002CEKZ,

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

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE202307,202405,_V1,_106911,_0485801,RM100000002CEL0,202405,999999,_V1,_106911,_0485801,RM100000002NHZS,

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 HEV Model)>DIAGNOSIS SYSTEM202307,999999,_57,_104409,_0606038,RM100000002C0LE,

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 HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Disconnect the millimeter wave radar sensor assembly connector.

0.167,1.021 0.615,1.281 0.448,0.26 0.854,1.792 1.313,1.094 true 2.583,1.813 2.073,1.094 true 0.156,0.115 0.469,0.313 0.313,0.198 10 false *a 0.24,1.063 0.802,1.344 0.563,0.281 10 false A181 0.625,1.802 1.01,2.021 0.385,0.219 10 false IGB 2.583,1.823 3.156,2.063 0.573,0.24 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
A181-5 (SGND) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A181-1 (IGB) - Body ground	Ignition switch ON	11 to 14 V

Result:

Proceed to
OK
NG

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Click hereADAS / AD>ADVANCED DRIVER ASSISTANCE SYSTEM>MILLIMETER WAVE RADAR SENSOR (Production Date from 2023/04)>REMOVAL202201,999999,_95,_112293,_0580212,RM1000000028VJ5,

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)