RM3660EC _57 Power Source / Network _080743 NETWORKING _0392424 CAN COMMUNICATION SYSTEM(for HV Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for HV Model)  Brake Actuator (Skid Control ECU) Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Brake Actuator (Skid Control ECU) Communication Stop Mode Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the "Communication Bus Check" screen of the GTS.
Click here(Click here)
·

Skid control ECU (brake actuator assembly) branch line or connector

·

Power source circuit of skid control ECU (brake actuator assembly)

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Skid control ECU (brake actuator assembly) ground circuit

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Skid control ECU (brake actuator assembly)



WIRING DIAGRAM

C506897E01
0.521,1.302 3.281,1.552 2.76,0.25 10 false No. 16 CAN Junction Connector*1 0.125,1.302 0.583,1.5 0.458,0.198 10 false A169 1.729,0.26 1.885,0.458 0.156,0.198 10 false 2 1.698,0.833 2.01,1.031 0.313,0.198 10 false 13*2 5.375,0.24 5.688,0.438 0.313,0.198 10 false 5 5.313,0.823 5.625,1.021 0.313,0.198 10 false 19 5.594,0.354 6.083,0.563 0.49,0.208 10 false CANH 5.594,0.948 6.073,1.146 0.479,0.198 10 false CANL 5.302,2.552 5.625,2.781 0.323,0.229 10 false 36 5.594,2.688 5.906,2.885 0.313,0.198 10 false IGR 5.594,3.365 6.01,3.563 0.417,0.198 10 false GND1 5.323,3.25 5.635,3.448 0.313,0.198 10 false 46 5.063,4.052 5.521,4.25 0.458,0.198 10 false A144 5.406,4.052 6.927,4.729 1.521,0.677 10 false Skid Control ECU (Brake Actuator Assembly) 1.615,2.646 3.469,2.865 1.854,0.219 10 false from IGR NO. 2 Relay 3.698,2.51 4.813,2.802 1.115,0.292 10 false ECU-IGR NO. 2 1.708,0.656 2.208,0.854 0.5,0.198 10 false 6*1*3 0.125,1.646 0.583,1.844 0.458,0.198 10 false A155 0.521,1.635 3.281,1.885 2.76,0.25 10 false No. 41 Junction Connector*2 0.885,3.531 3.646,3.781 2.76,0.25 10 false *1: for 8ZR-FXE (GTMC Made) 0.885,3.896 3.646,4.146 2.76,0.25 10 false *2: for 8ZR-FXE (TFTM Made) or M20G-FXS 0.521,1.979 3.281,2.229 2.76,0.25 10 false No. 39 Junction Connector*3 0.125,1.979 0.583,2.177 0.458,0.198 10 false A173 0.885,4.25 3.646,4.5 2.76,0.25 10 false *3: for M20F-FXS

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 HV 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 minutes 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.

·

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 HV Model)>DIAGNOSIS SYSTEM

·

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 (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH LINE)
a.

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


b.

Disconnect the A144 skid control ECU (brake actuator assembly) connector.


c.
C440175C32
1.479,0.115 1.885,0.344 0.406,0.229 2.198,0.281 2.031,0.281 2.031,0.281 2.031,0.948 true 2.26,1.823 2.094,1.823 2.094,1.823 2.094,1.156 true 0.073,0.094 0.385,0.292 0.313,0.198 10 false *a 1.531,0.156 2.063,0.354 0.531,0.198 10 false A144 2.333,1.74 2.833,1.938 0.5,0.198 10 false CANL 2.271,0.208 2.771,0.406 0.5,0.198 10 false CANH
*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))


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

Standard Resistance:
Tester Connection Condition Specified Condition
A144-5 (CANH) - A144-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω



Result:
Result
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.
C440175C33
1.479,0.115 1.885,0.344 0.406,0.229 2.156,1.844 1.99,1.844 1.99,1.844 1.99,1.26 true 0.604,1.823 0.771,1.823 0.771,1.823 0.771,1.24 true 0.073,0.094 0.385,0.292 0.313,0.198 10 false *a 1.542,0.156 2.073,0.354 0.531,0.198 10 false A144 2.26,1.76 2.76,1.958 0.5,0.198 10 false IGR 0.188,1.74 0.688,1.938 0.5,0.198 10 false GND1
*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))


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

Standard Resistance:
Tester Connection Condition Specified Condition
A144-46 (GND1) - 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 Condition Specified Condition
A144-36 (IGR) - Body ground Ignition switch ON 11 to 14 V



Result:
Result
OK
NG



OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR (for HV Model)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)