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

NETWORKING  CAN COMMUNICATION SYSTEM  DCM Communication Stop Mode  


DESCRIPTION

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

Telematics transceiver branch wire or connector

·

Power source circuit of telematics transceiver

·

Telematics transceiver ground circuit

·

Telematics transceiver



WIRING DIAGRAM

C427551E41
5.656,1.01 6.271,1.208 0.615,0.198 10 false CANP 5.656,1.542 6.271,1.74 0.615,0.198 10 false CANN 5.646,2.385 6.26,2.583 0.615,0.198 10 false +B 5.656,3.375 6.271,3.573 0.615,0.198 10 false IG2 5.646,4.427 6.26,4.625 0.615,0.198 10 false E 4.188,2.542 4.802,2.74 0.615,0.198 10 false DCM 1.531,0.906 2.146,1.104 0.615,0.198 10 false 8 1.531,1.396 2.281,1.583 0.75,0.188 10 false 19 5.375,0.938 5.99,1.135 0.615,0.198 10 false 25 5.365,1.438 5.979,1.635 0.615,0.198 10 false 26 5.438,2.25 6.052,2.448 0.615,0.198 10 false 1 5.375,3.26 5.99,3.458 0.615,0.198 10 false 19 5.375,4.271 5.99,4.469 0.615,0.198 10 false 20 5.063,4.688 5.594,5.125 0.531,0.438 10 false N209*1, N164*2 5.073,5.063 6.771,5.583 1.698,0.521 10 false Telematics Transceiver 0.375,1.917 0.99,2.115 0.615,0.198 10 false N127 0.365,2.104 1.615,2.677 1.25,0.573 10 false No. 7 CAN Junction Connector 4.01,3.5 5.104,3.917 1.094,0.417 10 false A/BAG-IG2 2.271,2.344 3.115,2.729 0.844,0.385 10 false from Battery 1.74,3.385 3.198,3.635 1.458,0.25 10 false from IG2-NO.2 Relay 0.167,4.958 2.375,5.354 2.208,0.396 10 false *1: for ERA-GLONASS 0.167,5.365 2.49,5.635 2.323,0.271 10 false *2: for Toyota Connected Services

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 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>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 (TELEMATICS TRANSCEIVER BRANCH WIRE)
a.

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


b.
C421785C03
1.5,0.667 1.917,0.917 0.417,0.25 1.5,0.323 1.917,0.573 0.417,0.25 1,2.75 1.167,2.75 1.167,2.75 1.25,1.583 true 1.417,1.583 1.677,2.75 1.677,2.75 1.833,2.75 true 0.135,0.104 0.448,0.302 0.313,0.198 10 false *a 1.531,0.698 1.906,0.906 0.375,0.208 10 false N164 0.615,2.667 1.083,2.885 0.469,0.219 10 false CANP 1.865,2.667 2.333,2.885 0.469,0.219 10 false CANN 1.531,0.365 1.906,0.573 0.375,0.208 10 false N209 1.99,0.354 2.365,0.563 0.375,0.208 10 false *A 2,0.708 2.375,0.917 0.375,0.208 10 false *B
*A for ERA-GLONASS
*B for Toyota Connected Services
*a Front view of wire harness connector
(to Telematics Transceiver)


Disconnect the telematics transceiver connector.


c.

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

Standard Resistance:
for ERA-GLONASS
Tester Connection Condition Specified Condition
N209-25 (CANP) - N209-26 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

for Toyota Connected Services
Tester Connection Condition Specified Condition
N164-25 (CANP) - N164-26 (CANN) 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.
C421785C04
1.5,0.667 1.917,0.917 0.417,0.25 1.51,0.313 1.927,0.563 0.417,0.25 0.469,1.406 0.49,0.656 0.49,0.656 0.323,0.656 true 0.521,1.604 0.542,2.719 0.542,2.719 0.708,2.719 true 0.646,1.583 1.115,2.563 1.115,2.563 1.281,2.563 true 0.135,0.104 0.448,0.302 0.313,0.198 10 false *a 1.552,0.719 1.958,0.917 0.406,0.198 10 false N164 0.115,0.583 0.583,0.802 0.469,0.219 10 false +B 0.729,2.646 1.198,2.865 0.469,0.219 10 false IG2 1.323,2.479 1.792,2.698 0.469,0.219 10 false E 1.563,0.354 1.969,0.552 0.406,0.198 10 false N209 2,0.365 2.406,0.563 0.406,0.198 10 false *A 2,0.698 2.406,0.896 0.406,0.198 10 false *B
*A for ERA-GLONASS
*B for Toyota Connected Services
*a Front view of wire harness connector
(to Telematics Transceiver)


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

Standard Resistance:
for ERA-GLONASS
Tester Connection Condition Specified Condition
N209-20 (E) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

for Toyota Connected Services
Tester Connection Condition Specified Condition
N164-20 (E) - 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:
for ERA-GLONASS
Tester Connection Condition Specified Condition
N209-1 (+B) - Body ground Always 11 to 14 V
N209-19 (IG2) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V

for Toyota Connected Services
Tester Connection Condition Specified Condition
N164-1 (+B) - Body ground Always 11 to 14 V
N164-19 (IG2) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE TELEMATICS TRANSCEIVER

for LHD: Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS TRANSCEIVER (for LHD)>REMOVAL

for RHD: Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS TRANSCEIVER (for RHD)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR