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

NETWORKING  CAN COMMUNICATION SYSTEM(for HEV Model)  Hybrid Vehicle Control ECU Communication Stop Mode  


DESCRIPTION

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

Hybrid vehicle control ECU branch line or connector

·

Power source circuit of hybrid vehicle control ECU

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Hybrid vehicle control ECU ground circuit

·

Hybrid vehicle control ECU



WIRING DIAGRAM

C484965E03
0.188,2.208 2.833,2.469 2.646,0.26 10 false No. 7 Global CAN Junction Connector 0.177,2.042 0.729,2.271 0.552,0.229 10 false I262 1.75,1.031 2.302,1.26 0.552,0.229 10 false 6 1.729,1.563 2.281,1.792 0.552,0.229 10 false 17 5.344,1.156 5.896,1.385 0.552,0.229 10 false I278 5.344,1.677 5.896,1.906 0.552,0.229 10 false I278 5.344,3.292 5.896,3.521 0.552,0.229 10 false I278 5.344,3.823 5.896,4.052 0.552,0.229 10 false I278 5.302,4.354 5.854,4.583 0.552,0.229 10 false A197 5.313,4.885 5.865,5.115 0.552,0.229 10 false A197 5.75,5.427 6.302,5.656 0.552,0.229 10 false E1 5.344,5.427 5.896,5.656 0.552,0.229 10 false I278 5.396,0.958 5.948,1.188 0.552,0.229 10 false 51 5.396,1.479 5.948,1.708 0.552,0.229 10 false 52 5.729,1.146 6.281,1.375 0.552,0.229 10 false CA1H 5.75,1.677 6.302,1.906 0.552,0.229 10 false CA1L 5.74,3.271 6.292,3.5 0.552,0.229 10 false MREL 5.396,3.083 5.948,3.313 0.552,0.229 10 false 10 1.406,3.271 3.156,3.594 1.75,0.323 10 false to IGCT-MAIN NO. 1 Relay 1.271,3.813 3.563,4.188 2.292,0.375 10 false from IGCT-MAIN NO. 1 Relay 5.302,5.844 7.042,6.26 1.74,0.417 10 false Hybrid Vehicle Control ECU 5.75,4.365 6.302,4.594 0.552,0.229 10 false E01 5.75,4.885 6.302,5.115 0.552,0.229 10 false E12 5.385,4.156 5.938,4.385 0.552,0.229 10 false 12 5.375,4.688 5.927,4.917 0.552,0.229 10 false 24 5.438,3.625 5.99,3.854 0.552,0.229 10 false 8 5.74,3.823 6.292,4.052 0.552,0.229 10 false +B1 3.802,3.979 4.75,4.26 0.948,0.281 10 false PM-IGCT 5.396,5.219 5.948,5.448 0.552,0.229 10 false 1

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 TROUBLESHOOTING

·

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 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 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.

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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 SYSTEM

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Inspect the fuses for circuits related to this system before performing the following procedure.

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Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.



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 (HYBRID VEHICLE CONTROL ECU BRANCH LINE)
a.

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


b.

Disconnect the hybrid vehicle control ECU connector.


c.
C430869C37
1.635,0.198 2.052,0.448 0.417,0.25 2.927,1.844 2.448,1.5 true 1.438,1.833 2.313,1.49 true 0.156,0.135 0.469,0.333 0.313,0.198 10 false *a 1.719,0.24 2.177,0.438 0.458,0.198 10 false I278 1.219,1.875 1.677,2.073 0.458,0.198 10 false CA1H 2.771,1.875 3.229,2.073 0.458,0.198 10 false CA1L
*a Front view of wire harness connector
(to Hybrid Vehicle Control ECU)


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

Standard Resistance:
Tester Connection Condition Specified Condition
I278-51 (CA1H) - I278-52 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω



Result:
Proceed to
OK
NG



OK

2.CHECK ECU POWER SOURCE CIRCUIT

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU)

2.CHECK ECU POWER SOURCE CIRCUIT
a.

Check the ECU power source circuit.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>ECU Power Source Circuit


Result:
Proceed to
OK
NG



OK

REPLACE HYBRID VEHICLE CONTROL ECU

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)