RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694854 CAN COMMUNICATION SYSTEM(for SFTM Made Gasoline Model) J

NETWORKING  CAN COMMUNICATION SYSTEM(for SFTM Made Gasoline Model)  Skid Control ECU Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
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)
·

Brake actuator assembly (skid control ECU) branch wire or connector

·

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

·

Brake actuator assembly (skid control ECU) ground circuit

·

Brake actuator assembly (skid control ECU)



WIRING DIAGRAM

C421423E02
5.167,5.958 5.625,6.156 0.458,0.198 10 false A39 5.76,0.583 6.219,0.781 0.458,0.198 10 false CANH 5.771,1.052 6.229,1.25 0.458,0.198 10 false CANL 5.76,1.906 6.219,2.104 0.458,0.198 10 false +BM 5.781,3.115 6.24,3.313 0.458,0.198 10 false IGR 5.781,5.104 6.24,5.302 0.458,0.198 10 false GND2 5.531,0.5 5.99,0.698 0.458,0.198 10 false 5 5.479,0.979 5.938,1.177 0.458,0.198 10 false 19 5.49,2.438 5.948,2.635 0.458,0.198 10 false 30 5.469,4.344 5.927,4.542 0.458,0.198 10 false 46 1.844,0.469 2.302,0.667 0.458,0.198 10 false 3 1.854,0.948 2.313,1.146 0.458,0.198 10 false 9 0.302,1.281 0.76,1.479 0.458,0.198 10 false A129 0.292,1.427 2.583,1.635 2.292,0.208 10 false No. 10 CAN Junction Connector 3.823,1.74 5.021,1.958 1.198,0.219 10 false ABS NO.1 3.823,2.365 5.021,2.583 1.198,0.219 10 false ABS NO.2 2.24,1.885 3.917,2.104 1.677,0.219 10 false from Battery 5.146,6.135 6.781,6.677 1.635,0.542 10 false Brake Actuator Assembly (Skid Control ECU) 5.771,2.479 6.229,2.677 0.458,0.198 10 false +BS 2.198,2.458 3.875,2.677 1.677,0.219 10 false from Battery 5.51,1.813 5.969,2.01 0.458,0.198 10 false 1 5.479,3.031 5.938,3.229 0.458,0.198 10 false 36 5.781,4.417 6.24,4.615 0.458,0.198 10 false GND1 5.469,5.01 5.927,5.208 0.458,0.198 10 false 14 1.021,3.167 3.479,3.563 2.458,0.396 10 false from Engine Stop and Start ECU

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 SFTM Made Gasoline 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 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.

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 (for SFTM Made Gasoline 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 (BRAKE ACTUATOR ASSEMBLY [SKID CONTROL ECU] BRANCH WIRE)
a.

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


b.
C403312C10
1.479,0.125 1.927,0.354 0.448,0.229 1.083,1.958 1.25,1.958 1.25,1.958 1.417,1.292 true 0.896,1.771 1.063,1.771 1.063,1.771 1.344,1.115 true 0.094,0.083 0.406,0.281 0.313,0.198 10 false *a 1.583,0.167 2.042,0.365 0.458,0.198 10 false A39 0.646,1.885 1.104,2.083 0.458,0.198 10 false CANH 0.49,1.698 0.948,1.896 0.458,0.198 10 false CANL
*a Front view of wire harness connector
(to Brake Actuator Assembly [Skid Control ECU])


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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A39-5 (CANH) - A39-19 (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.
C403312C21
1.479,0.125 1.927,0.354 0.448,0.229 0.583,1 0.417,0.167 0.417,0.167 0.583,0.167 true 2.833,1 2.833,0.333 2.833,0.333 2.667,0.333 true 2.833,1.25 2.833,1.833 2.833,1.833 2.667,1.833 true 0.583,1.25 0.583,1.833 0.583,1.833 0.75,1.833 true 1.469,0.917 1.323,0.406 1.323,0.406 1.156,0.406 true 0.094,0.083 0.406,0.281 0.313,0.198 10 false *a 1.583,0.167 2.042,0.365 0.458,0.198 10 false A39 0.667,0.083 1.125,0.281 0.458,0.198 10 false +BS 0.813,1.76 1.271,1.958 0.458,0.198 10 false +BM 0.896,0.333 1.354,0.531 0.458,0.198 10 false IGR 2.24,0.271 2.698,0.469 0.458,0.198 10 false GND1 2.25,1.76 2.708,1.958 0.458,0.198 10 false GND2
*a Front view of wire harness connector
(to Brake Actuator Assembly [Skid Control ECU])


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

Standard Resistance:
Tester Connection Condition Specified Condition
A39-46 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
A39-14 (GND2) - 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.

Standard Voltage:
Tester Connection Condition Specified Condition
A39-36 (IGR) - Body ground Ignition switch ON 10.5 to 16 V
Ignition switch off Below 1 V
A39-1 (+BM) - Body ground Always 11 to 14 V
A39-30 (+BS) - Body ground Always 11 to 14 V



Result:
Result Proceed to
OK A
NG (IGR terminal) B
NG (Other terminal) C



A

REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

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


B

GO TO STOP AND START SYSTEM

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>Backup Boost Converter Circuit


C

REPAIR OR REPLACE HARNESS OR CONNECTOR