RM35X0E _57 Power Source / Network _078518 NETWORKING _0381088 CAN COMMUNICATION SYSTEM J

NETWORKING  CAN COMMUNICATION SYSTEM  Air Conditioning Amplifier Communication Stop Mode  


DESCRIPTION

Detection Item Symptom Trouble Area
Air Conditioning Amplifier Communication Stop Mode Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the GTS.
(Click here)
·

Air conditioning amplifier assembly branch wire or connector

·

Power source circuit of air conditioning amplifier assembly

·

Air conditioning amplifier assembly ground circuit

·

Air conditioning amplifier assembly



WIRING DIAGRAM

except Wagon
C414443E08
0.26,2.021 2.323,2.292 2.063,0.271 10 false No. 11 CAN Junction Connector 0.26,1.854 0.729,2.115 0.469,0.26 10 false N218 1.708,1.458 2.042,1.719 0.333,0.26 10 false 17 1.729,0.875 2.063,1.135 0.333,0.26 10 false 6 5.396,0.896 5.729,1.156 0.333,0.26 10 false 2 5.396,1.458 5.729,1.719 0.333,0.26 10 false 1 3.917,2.323 5.083,2.667 1.167,0.344 10 false ECU-ALT NO.1 5.396,2.365 5.729,2.625 0.333,0.26 10 false 5 5.396,3.188 5.729,3.448 0.333,0.26 10 false 6 2.281,2.438 3.76,2.708 1.479,0.271 10 false from Battery 1.802,3.271 3.333,3.635 1.531,0.365 10 false from IG1 NO.3 Relay 5.354,4.01 5.688,4.271 0.333,0.26 10 false 17 5.656,4.146 5.99,4.406 0.333,0.26 10 false GND 5.667,3.313 6,3.573 0.333,0.26 10 false IG+ 5.667,2.5 6,2.76 0.333,0.26 10 false B 5.656,1.01 6.281,1.26 0.625,0.25 10 false CANH 5.667,1.594 6.344,1.906 0.677,0.313 10 false CANL 5.26,4.781 6.552,5.031 1.292,0.25 10 false N40*1, N42*2 5.25,4.958 6.792,5.385 1.542,0.427 10 false Air Conditioning Amplifier Assembly 0.271,5.271 3.177,5.625 2.906,0.354 10 false *2: for Automatic Air Conditioning System 0.271,4.854 3.177,5.208 2.906,0.354 10 false *1: except Automatic Air Conditioning System

for Wagon
C414443E09
0.26,2.021 2.323,2.292 2.063,0.271 10 false No. 6 CAN Junction Connector 0.26,1.854 0.729,2.115 0.469,0.26 10 false N126 1.708,1.458 2.042,1.719 0.333,0.26 10 false 17 1.729,0.875 2.063,1.135 0.333,0.26 10 false 7 5.396,0.896 5.729,1.156 0.333,0.26 10 false 2 5.396,1.458 5.729,1.719 0.333,0.26 10 false 1 3.917,2.323 5.083,2.667 1.167,0.344 10 false ECU-ALT NO.1 5.396,2.365 5.729,2.625 0.333,0.26 10 false 5 5.396,3.188 5.729,3.448 0.333,0.26 10 false 6 2.281,2.438 3.76,2.708 1.479,0.271 10 false from Battery 1.802,3.271 3.333,3.635 1.531,0.365 10 false from IG1 NO.3 Relay 5.354,4.01 5.688,4.271 0.333,0.26 10 false 17 5.656,4.146 5.99,4.406 0.333,0.26 10 false GND 5.667,3.313 6,3.573 0.333,0.26 10 false IG+ 5.667,2.5 6,2.76 0.333,0.26 10 false B 5.656,1.01 6.281,1.26 0.625,0.25 10 false CANH 5.667,1.594 6.344,1.906 0.677,0.313 10 false CANL 5.26,4.781 6.552,5.031 1.292,0.25 10 false N40*1, N42*2 5.25,4.958 6.792,5.385 1.542,0.427 10 false Air Conditioning Amplifier Assembly 0.271,5.271 3.177,5.625 2.906,0.354 10 false *2: for Automatic Air Conditioning System 0.271,4.854 3.177,5.208 2.906,0.354 10 false *1: except Automatic Air Conditioning System

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>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.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

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 REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE


·

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>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 (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH WIRE)
a.

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


b.
B532755C08
1.5,0.156 1.927,0.396 0.427,0.24 1.5,0.479 1.927,0.719 0.427,0.24 1.115,1.135 0.802,0.594 0.802,0.594 0.615,0.594 true 1.25,1.188 0.729,1.896 0.729,1.896 0.542,1.896 true 1.583,0.219 2.042,0.417 0.458,0.198 10 false N40 0.24,0.521 0.698,0.719 0.458,0.198 10 false CANL 0.135,1.813 0.594,2.01 0.458,0.198 10 false CANH 0.135,0.073 0.594,0.271 0.458,0.198 10 false *a 1.99,0.219 2.448,0.417 0.458,0.198 10 false *A 1.583,0.531 2.042,0.729 0.458,0.198 10 false N42 1.99,0.51 2.448,0.708 0.458,0.198 10 false *B
*A except Automatic Air Conditioning System
*B for Automatic Air Conditioning System
*a Front view of wire harness connector
(to Air Conditioning Amplifier Assembly)


Disconnect the N40*1 or N42*2 air conditioning amplifier assembly connector.

*1: except Automatic Air Conditioning System

*2: for Automatic Air Conditioning System



c.

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

Standard Resistance:
except Automatic Air Conditioning System
Tester Connection Condition Specified Condition
N40-2 (CANH) - N40-1 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

for Automatic Air Conditioning System
Tester Connection Condition Specified Condition
N42-2 (CANH) - N42-1 (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.
B532755C09
1.5,0.156 1.927,0.396 0.427,0.24 1.5,0.479 1.927,0.719 0.427,0.24 1.188,1.365 0.75,1.75 0.75,1.75 0.583,1.75 true 2.875,0.469 2.74,0.469 2.74,0.469 2.552,1.292 true 1.052,1.292 0.781,1.021 0.781,1.021 0.594,1.021 true 1.583,0.219 2.042,0.417 0.458,0.198 10 false N40 0.292,1.667 0.75,1.865 0.458,0.198 10 false IG+ 0.135,0.073 0.594,0.271 0.458,0.198 10 false *a 2.927,0.406 3.385,0.604 0.458,0.198 10 false GND 0.438,0.948 0.896,1.146 0.458,0.198 10 false B 1.99,0.219 2.448,0.417 0.458,0.198 10 false *A 1.583,0.531 2.042,0.729 0.458,0.198 10 false N42 1.99,0.51 2.448,0.708 0.458,0.198 10 false *B
*A except Automatic Air Conditioning System
*B for Automatic Air Conditioning System
*a Front view of wire harness connector
(to Air Conditioning Amplifier Assembly)


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

Standard Resistance:
except Automatic Air Conditioning System
Tester Connection Condition Specified Condition
N40-17 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

for Automatic Air Conditioning System
Tester Connection Condition Specified Condition
N42-17 (GND) - 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:
except Automatic Air Conditioning System
Tester Connection Condition Specified Condition
N40-5 (B) - Body ground Always 11 to 14 V
N40-6 (IG+) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V

for Automatic Air Conditioning System
Tester Connection Condition Specified Condition
N42-5 (B) - Body ground Always 11 to 14 V
N42-6 (IG+) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR