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

NETWORKING  CAN COMMUNICATION SYSTEM  Power Steering ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Power Steering ECU Communication Stop Mode Communication stop for "PPS" is indicated on the "Communication Bus Check" screen of the GTS.
(Click here)
·

Power steering ECU assembly branch wire or connector

·

Power source circuit of power steering ECU assembly

·

Power steering ECU assembly ground circuit

·

Power steering ECU assembly



WIRING DIAGRAM

C491452E01
0.604,1.729 2.854,1.969 2.25,0.24 10 false No. 5 CAN Junction Connector 5.76,0.635 6.323,0.948 0.563,0.313 10 false CANH 5.76,1.073 6.333,1.302 0.573,0.229 10 false CANL 5.5,0.979 5.688,1.198 0.188,0.219 10 false 2 5.5,2.958 5.688,3.208 0.188,0.25 10 false 3 5.5,2.146 5.656,2.375 0.156,0.229 10 false 5 5.5,0.531 5.625,0.792 0.125,0.26 10 false 1 5.76,3.063 6.313,3.313 0.552,0.25 10 false GND 1.542,2.26 2.938,2.479 1.396,0.219 10 false from IG1 NO.1 Relay 5.76,2.26 6.354,2.458 0.594,0.198 10 false IG 4.177,2.083 5.198,2.396 1.021,0.313 10 false ECU-IG1 NO.3 5.615,3.875 6.052,4.104 0.438,0.229 10 false N36 1.844,0.604 2.271,0.771 0.427,0.167 10 false N219 1.906,0.365 2.219,0.573 0.313,0.208 10 false 4*1 5.615,4.052 6.656,4.76 1.042,0.708 10 false Power Steering ECU Assembly 1.844,1.26 2.271,1.427 0.427,0.167 10 false N219 1.865,1.01 2.219,1.208 0.354,0.198 10 false 15*1 2.354,0.604 2.781,0.771 0.427,0.167 10 false N221 2.406,0.354 2.719,0.563 0.313,0.208 10 false 8*2 2.365,1.021 2.719,1.219 0.354,0.198 10 false 19*2 2.354,1.26 2.781,1.427 0.427,0.167 10 false N221 0.198,3.771 1.344,3.979 1.146,0.208 10 false *1: for Wagon 0.198,4.198 1.49,4.406 1.292,0.208 10 false *2: except Wagon

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 TROUBLESHOOTING

·

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 BATTERY

·

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

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 CHART


·

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

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE

·

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 SYSTEM



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 (POWER STEERING ECU ASSEMBLY BRANCH WIRE)
a.

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


b.
U154144C06
1.302,1.438 1.479,1.771 1.479,1.771 1.573,1.771 true 1.115,1.438 0.938,1.771 0.938,1.771 0.844,1.771 true 0.094,0.063 0.333,0.281 0.24,0.219 10 false *a 1.635,1.719 2.083,1.927 0.448,0.208 10 false CANL 0.417,1.677 0.865,1.885 0.448,0.208 10 false CANH 1.604,0.375 1.958,0.542 0.354,0.167 10 false N36
*a Front view of wire harness connector
(to Power Steering ECU Assembly)


Disconnect the N36 power steering ECU assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N36-1 (CANH) - N36-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.
U154145C04
1.802,1.458 1.969,1.792 1.969,1.792 2.052,1.792 true 1.458,1.458 1.292,1.792 1.292,1.792 1.208,1.792 true 0.083,0 0.323,0.219 0.24,0.219 10 false *a 2.104,1.719 2.552,1.927 0.448,0.208 10 false IG 0.865,1.698 1.313,1.906 0.448,0.208 10 false GND 1.604,0.406 1.979,0.573 0.375,0.167 10 false N36
*a Front view of wire harness connector
(to Power Steering ECU Assembly)


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

Standard Resistance:
Tester Connection Condition Specified Condition
N36-3 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω



b.

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


c.

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

Tester Connection Switch Condition Specified Condition
N36-5 (IG) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V


Result:
Proceed to
OK
NG



OK

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR