RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694853 CAN COMMUNICATION SYSTEM(for SFTM Made HV Model) J

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


DESCRIPTION

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

Brake booster with master cylinder assembly (No. 1 skid control ECU) branch wire or connector

·

Power source circuit of brake booster with master cylinder assembly (No. 1 skid control ECU)

·

Brake booster with master cylinder assembly (No. 1 skid control ECU) ground circuit

·

Brake booster with master cylinder assembly (No. 1 skid control ECU)



WIRING DIAGRAM

C435715E31
4.854,5.656 5.313,5.854 0.458,0.198 10 false A121 5.76,0.583 6.219,0.781 0.458,0.198 10 false CA1H 5.771,1.052 6.229,1.25 0.458,0.198 10 false CA1L 5.76,1.948 6.219,2.146 0.458,0.198 10 false +BI1 5.781,3.198 6.24,3.396 0.458,0.198 10 false IG1 5.51,0.5 5.969,0.698 0.458,0.198 10 false 38 5.521,0.958 5.979,1.156 0.458,0.198 10 false 39 5.479,2.458 5.938,2.656 0.458,0.198 10 false 15 5.521,4.656 5.979,4.854 0.458,0.198 10 false 28 1.844,0.469 2.594,0.667 0.75,0.198 10 false 3 1.854,0.948 2.656,1.156 0.802,0.208 10 false 9 0.292,1.219 0.99,1.583 0.698,0.365 10 false A129 0.292,1.427 2.656,1.833 2.365,0.406 10 false No. 10 CAN Junction Connector 3.771,1.781 4.969,2 1.198,0.219 10 false ABS NO.3 3.802,2.427 5,2.646 1.198,0.219 10 false ABS MAIN 4.865,5.854 7.083,6.292 2.219,0.438 10 false Brake Booster with Master Cylinder Assembly (No. 1 Skid Control ECU) 5.781,2.552 6.24,2.75 0.458,0.198 10 false BS 1.594,2.563 3.01,2.771 1.417,0.208 10 false from Auxiliary Battery 5.51,1.833 5.969,2.031 0.458,0.198 10 false 14 5.479,3.073 5.938,3.271 0.458,0.198 10 false 31 5.802,4.792 6.26,4.99 0.458,0.198 10 false GND1 1.635,3.177 3.26,3.479 1.625,0.302 10 false from IGR NO.1 Relay 1.594,1.948 2.979,2.281 1.385,0.333 10 false from Auxiliary Battery 3.708,3.656 4.906,3.875 1.198,0.219 10 false ECU-IGP NO.3 3.74,3.052 4.938,3.271 1.198,0.219 10 false ECU-IGR NO.3 5.781,3.802 6.24,4 0.458,0.198 10 false IG2 5.479,3.688 5.938,3.885 0.458,0.198 10 false 42 1.958,3.813 3.052,4.125 1.094,0.313 10 false from IGP 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 SFTM 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 SFTM 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 (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (NO. 1 SKID CONTROL ECU) BRANCH WIRE)
a.

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


b.
C303147C41
1.448,0.135 1.865,0.406 0.417,0.271 2.479,2.729 2.333,2.729 2.333,2.729 2.146,2.01 true 1.771,2.729 1.896,2.729 1.896,2.729 2.052,2.031 true 0.094,0.094 0.49,0.406 0.396,0.313 10 false *a 1.49,0.198 1.948,0.438 0.458,0.24 10 false A121 1.333,2.646 2.104,2.844 0.771,0.198 10 false CA1H 2.573,2.656 3.344,2.854 0.771,0.198 10 false CA1L
*a Front view of wire harness connector
(to Brake Booster with Master Cylinder Assembly (No. 1 Skid Control ECU))


Disconnect the brake booster with master cylinder assembly (No. 1 skid control ECU) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A121-38 (CA1H) - A121-39 (CA1L) Cable disconnected from negative (-) auxiliary 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.
C303147C34
1.448,0.135 1.865,0.406 0.417,0.271 1.198,2.927 1.344,2.927 1.344,2.927 1.344,2.021 true 2.771,0.813 2.625,0.813 2.625,0.813 2.625,1.604 true 2.781,2.729 2.625,2.729 2.625,2.729 2.625,1.906 true 2.594,2.948 2.438,2.948 2.438,2.948 2.438,2.01 true 2.604,0.521 2.458,0.521 2.458,0.521 2.458,1.563 true 0.094,0.094 0.49,0.406 0.396,0.313 10 false *a 1.521,0.198 1.979,0.438 0.458,0.24 10 false A121 2.865,2.646 3.427,2.844 0.563,0.198 10 false GND1 2.656,0.427 3.427,0.625 0.771,0.198 10 false +BI1 2.885,0.729 3.344,0.917 0.458,0.188 10 false BS 0.948,2.844 1.406,3.031 0.458,0.188 10 false IG1 2.677,2.865 3.135,3.052 0.458,0.188 10 false IG2
*a Front view of wire harness connector
(to Brake Booster with Master Cylinder Assembly (No. 1 Skid Control ECU))


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

Standard Resistance:
Tester Connection Condition Specified Condition
A121-28 (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 Switch Condition Specified Condition
A121-14 (+BI1) - Body ground Power switch off 11 to 14 V
A121-15 (BS) - Body ground Power switch off 11 to 14 V
A121-31 (IG1) - Body ground Power switch on (IG) 11 to 14 V
Power switch off Below 1 V
A121-42 (IG2) - Body ground Power switch on (IG) 11 to 14 V
Power switch off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (NO. 1 SKID CONTROL ECU)

Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE BOOSTER (for HV Model)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR