RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694855 CAN COMMUNICATION SYSTEM(for GTMC Made HV Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for GTMC Made HV 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)
·

Rack and pinion power steering gear assembly main wire 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

C435688E15
5.813,0.49 6.427,0.688 0.615,0.198 10 false CANH 5.813,1.302 6.427,1.5 0.615,0.198 10 false CANL 5.813,3.417 6.427,3.615 0.615,0.198 10 false PGND 5.813,2.469 6.427,2.667 0.615,0.198 10 false IG 4.542,2.281 5.281,2.563 0.74,0.281 10 false EPS-IGR 5.594,2.344 6.208,2.542 0.615,0.198 10 false 4 5.594,3.313 6.208,3.51 0.615,0.198 10 false 7 5.5,1.031 6.115,1.229 0.615,0.198 10 false 11 5.49,0.51 6.104,0.708 0.615,0.198 10 false 10 1.656,0.521 2.271,0.719 0.615,0.198 10 false 1 1.677,1.052 2.292,1.25 0.615,0.198 10 false 7 5.052,3.615 5.667,3.813 0.615,0.198 10 false C54 5.052,3.833 7.063,4.229 2.01,0.396 10 false Rack and Pinion Power Steering Gear Assembly 0.125,1.615 2.458,1.896 2.333,0.281 10 false No. 10 CAN Junction Connector 0.125,1.396 0.74,1.594 0.615,0.198 10 false A129 2.208,2.458 3.677,2.677 1.469,0.219 10 false from IGR NO.2 Relay

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 GTMC Made HV Model)>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 power 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 minutes or more before measuring the resistance.

·

After the power 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 BATTERY

·

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 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 power switch on (IG) 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 GTMC Made HV Model)>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 (RACK AND PINION POWER STEERING GEAR ASSEMBLY MAIN WIRE)
a.

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


b.

Disconnect the rack and pinion power steering gear assembly connector.

C374510C56
1.958,0.271 2.375,0.521 0.417,0.25 3.604,1.26 4.583,0.583 4.583,0.583 4.75,0.583 true 3.688,1.344 4.552,1.667 4.552,1.667 4.719,1.667 true 2.031,0.313 2.5,0.573 0.469,0.26 10 false C54 4.833,0.531 5.458,0.729 0.625,0.198 10 false CANH 0.125,0.094 0.594,0.354 0.469,0.26 10 false *a 4.792,1.573 5.417,1.771 0.625,0.198 10 false CANL
*a Front view of wire harness connector
(to Rack and Pinion Power Steering Gear Assembly) 		- -



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C54-10 (CANH) - C54-11 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.

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

C374510C58
1.958,0.271 2.375,0.521 0.417,0.25 3.479,1.146 4.208,0.26 4.208,0.26 4.375,0.26 true 2.448,1.563 2.615,1.563 2.615,1.563 3.135,1.25 true 2.031,0.313 2.5,0.573 0.469,0.26 10 false C54 4.448,0.188 5.073,0.385 0.625,0.198 10 false IG 0.125,0.094 0.594,0.354 0.469,0.26 10 false *a 2,1.5 2.625,1.698 0.625,0.198 10 false PGND
*a Front view of wire harness connector
(to Rack and Pinion Power Steering Gear Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
C54-7 (PGND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω



b.

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


c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
C54-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
Power switch off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

Click hereSteering>STEERING GEAR / LINKAGE>STEERING GEAR>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR