RM38N0EC _57 Power Source / Network _111829 NETWORKING _0499998 CAN COMMUNICATION SYSTEM(for Gasoline Model) J

NETWORKING CAN COMMUNICATION SYSTEM(for Gasoline Model) Driver Seat Control ECU Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Driver Seat Control ECU Communication Stop Mode	Communication stop for "D-Seat" is indicated on the "Communication Bus Check" screen of the GTS. Click here(202303,202406,_57,_111829,_0499998,RM10000000291NB,202406,202409,_57,_111829,_0499998,RM100000002L89Q,202409,999999,_57,_111829,_0499998,RM100000002O6WO,)	· Position control ECU assembly branch line or connector · Power source circuit of position control ECU assembly · Position control ECU assembly ground circuit · Position control ECU assembly

WIRING DIAGRAM

4.896,5.813 7.156,6.052 2.26,0.24 10 false Position Control ECU Assembly 0.531,1.75 3.031,2.094 2.5,0.344 10 false No. 8 Global CAN Junction Connector 0.229,1.75 0.75,1.958 0.521,0.208 10 false L27 1.76,0.688 2.281,0.896 0.521,0.208 10 false 4 1.729,1.281 2.25,1.49 0.521,0.208 10 false 10 5.229,0.802 5.75,1.01 0.521,0.208 10 false U35 5.24,3.333 5.76,3.542 0.521,0.208 10 false U33 5.281,0.563 5.802,0.771 0.521,0.208 10 false 13 5.271,1.146 5.792,1.354 0.521,0.208 10 false 14 5.646,0.813 6.167,1.021 0.521,0.208 10 false CANP 5.667,1.396 6.188,1.604 0.521,0.208 10 false CANN 5.302,2.365 5.823,2.573 0.521,0.208 10 false 1 5.323,3.115 5.844,3.323 0.521,0.208 10 false 3 5.292,3.854 5.813,4.063 0.521,0.208 10 false 15 5.333,4.885 5.854,5.094 0.521,0.208 10 false 2 5.677,2.604 6.198,2.813 0.521,0.208 10 false IG 5.656,3.323 6.177,3.531 0.521,0.208 10 false +B 5.646,4.073 6.167,4.281 0.521,0.208 10 false SYSB 5.677,5.125 6.198,5.333 0.521,0.208 10 false GND 3.719,2.448 4.875,2.719 1.156,0.271 10 false ECU-IGR NO. 1 3.875,3.188 5.031,3.458 1.156,0.271 10 false P/SEAT D 3.74,3.927 4.896,4.198 1.156,0.271 10 false ECU-DCC NO. 2 2.271,3.323 3.844,3.792 1.573,0.469 10 false from Battery 1.729,2.604 3.302,3.073 1.573,0.469 10 false from IGR NO. 1 Relay 2.281,4.052 3.854,4.521 1.573,0.469 10 false from Battery 5.24,1.385 5.76,1.594 0.521,0.208 10 false U35 5.229,2.604 5.75,2.813 0.521,0.208 10 false U35 5.229,4.073 5.75,4.281 0.521,0.208 10 false U35 5.24,5.115 5.76,5.323 0.521,0.208 10 false U33

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)>HOW TO PROCEED WITH TROUBLESHOOTING202303,999999,_57,_111829,_0499998,RM10000000291N8,

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 BATTERY202303,202406,_V1,_111780,_0504976,RM100000002AJR4,202406,999999,_V1,_111780,_0504976,RM100000002MNUD,

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE202203,202406,_V1,_111780,_0504976,RM1000000022CKY,202406,999999,_V1,_111780,_0504976,RM100000002MNUE,

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 CHART202111,999999,_V1,_111780,_0504976,RM100000001ZKRU,

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

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE202303,202406,_V1,_111780,_0504977,RM100000002AA1Y,202406,202409,_V1,_111780,_0504977,RM100000002MO96,202409,999999,_V1,_111780,_0504977,RM100000002OMBP,

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)>DIAGNOSIS SYSTEM202303,202406,_57,_111829,_0499998,RM10000000291NB,202406,202409,_57,_111829,_0499998,RM100000002L89Q,202409,999999,_57,_111829,_0499998,RM100000002O6WO,

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 (POSITION CONTROL ECU ASSEMBLY BRANCH LINE)

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

Disconnect the U35 position control ECU assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(U35)Location & Routingewd_type=routing;type=c;code=U35 Click Connector(U35)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LHewd_type=component;type=c;code=U35;pinno=13,14
U35-13 (CANP) - U35-14 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(U35)Location & Routingewd_type=routing;type=c;code=U35

Click Connector(U35)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LHewd_type=component;type=c;code=U35;pinno=13,14

U35-13 (CANP) - U35-14 (CANN)

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 (POSITION CONTROL ECU ASSEMBLY)

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

Disconnect the U33 position control ECU assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(U33)Location & Routingewd_type=routing;type=c;code=U33 Click Connector(U33)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LHewd_type=component;type=c;code=U33;pinno=2
U33-2 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(U33)Location & Routingewd_type=routing;type=c;code=U33

Click Connector(U33)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LHewd_type=component;type=c;code=U33;pinno=2

U33-2 (GND) - 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
Click Location & Routing(U33,U35)Location & Routingewd_type=routing;type=c,c;code=U33,U35 Click Connector(U33)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LHewd_type=component;type=c;code=U33;pinno=3 Click Connector(U35)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LHewd_type=component;type=c;code=U35;pinno=1,15
U33-3 (+B) - Body ground	Always	11 to 14 V
U35-1 (IG) - Body ground	Ignition switch ON	11 to 14 V
U35-15 (SYSB) - Body ground	Always	11 to 14 V

Result:

Result
OK
NG

3.CHECK VEHICLE TYPE

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

3.CHECK VEHICLE TYPE

Check vehicle type.

Result:

Result	Proceed to
for SFTM Made	A
for GTMC Made	B

REPLACE POSITION CONTROL ECU ASSEMBLY

Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for SFTM Made)>REMOVAL202303,202406,_58,_111839,_0500782,RM100000002B4Y0,202406,999999,_58,_111839,_0500782,RM100000002MQQP,

REPLACE POSITION CONTROL ECU ASSEMBLY

Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for GTMC Made)>REMOVAL202303,202406,_58,_111839,_0525817,RM100000002B4XZ,202406,999999,_58,_111839,_0525817,RM100000002MQQR,