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

NETWORKING CAN COMMUNICATION SYSTEM(for Gasoline Model) Power Steering ECU Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Power Steering ECU Communication Stop Mode	Communication stop for "Power Steering (EPS)" 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,)	· Rack and pinion power steering gear assembly main line or connector · Power source circuit of rack and pinion power steering gear assembly · Rack and pinion power steering gear assembly ground circuit · Rack and pinion power steering gear assembly

WIRING DIAGRAM

0.229,1.5 0.688,1.698 0.458,0.198 10 false A72 5.115,4.052 7.115,4.49 2,0.438 10 false Rack and Pinion Power Steering Gear Assembly 4.792,4.052 5.25,4.25 0.458,0.198 10 false C37 5.302,0.458 5.76,0.656 0.458,0.198 10 false 10 5.323,1.031 5.781,1.229 0.458,0.198 10 false 11 5.615,0.448 6.073,0.646 0.458,0.198 10 false CANH 1.677,1.01 2.135,1.208 0.458,0.198 10 false 11 1.698,0.427 2.156,0.625 0.458,0.198 10 false 5 5.615,1.031 6.073,1.229 0.458,0.198 10 false CANL 5.615,2.167 6.073,2.365 0.458,0.198 10 false IG 5.594,3.542 6.115,3.76 0.521,0.219 10 false PGND 0.531,1.5 3.281,1.781 2.75,0.281 10 false No. 1 Global CAN Junction Connector 5.375,3.396 5.833,3.594 0.458,0.198 10 false 7 5.365,2.031 5.823,2.229 0.458,0.198 10 false 4 1.031,2.146 3.281,2.573 2.25,0.427 10 false from Engine Stop and Start ECU 5.615,2.969 6.073,3.167 0.458,0.198 10 false PIG 5.375,2.833 5.833,3.031 0.458,0.198 10 false 8 4.063,2.802 5.198,3.052 1.135,0.25 10 false EPS 2.219,2.948 3.906,3.313 1.688,0.365 10 false from Battery

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 (RACK AND PINION POWER STEERING GEAR ASSEMBLY MAIN LINE)

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

Disconnect the C37 rack and pinion power steering gear assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37 Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=10,11
C37-10 (CANH) - C37-11 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37

Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=10,11

C37-10 (CANH) - C37-11 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Result:

Result
OK
NG

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (RACK AND PINION POWER STEERING GEAR ASSEMBLY)

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37 Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=7
C37-7 (PGND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37

Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=7

C37-7 (PGND) - 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(C37)Location & Routingewd_type=routing;type=c;code=C37 Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=8
C37-8 (PIG) - Body ground	Always	11 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37

Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=8

C37-8 (PIG) - Body ground

Always

11 to 14 V

Result:

Result
OK
NG

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37 Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=4
C37-4 (IG) - Body ground	Ignition switch ON	10.5 to 16 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(C37)Location & Routingewd_type=routing;type=c;code=C37

Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=4

C37-4 (IG) - Body ground

Ignition switch ON

10.5 to 16 V

Result:

Result
OK
NG

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

Click hereSteering>STEERING GEAR / LINKAGE>STEERING GEAR>REMOVAL202303,202406,_55,_111821,_0503296,RM100000002B2NK,202406,202409,_55,_111821,_0503296,RM100000002MQ5G,202409,999999,_55,_111821,_0503296,RM100000002OMWM,

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 Circuit202303,202406,_51,_111803,_0509671,RM1000000029H6Z,202406,202409,_51,_111803,_0509671,RM100000002KOTS,202409,999999,_51,_111803,_0509671,RM100000002OAHO,