Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

Power Source Network. Yaris. Ncp93, 131
Networking. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DLC3

CHECK CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK CAN MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY)

CONNECT CONNECTOR

CHECK CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

CONNECT CONNECTOR

CHECK CAN MAIN WIRE OR CONNECTOR (ECM)

CONNECT CONNECTOR

CHECK CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - ECM)

CHECK CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

CAN COMMUNICATION SYSTEM (for Hatchback except Separate Type Yaw Rate Sensor) - Open in CAN Main Bus Line


DESCRIPTION

There may be an open circuit in the CAN main wire and/or DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher.

Symptom
Trouble Area
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher.
  1. CAN main wire or connector
  2. No. 1 junction connector
  3. No. 2 junction connector
  4. ECM
  5. Combination meter assembly
  6. DLC3 branch wire or connector

WIRING DIAGRAM


Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line


INSPECTION PROCEDURE

NOTICE:
  1. Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
  2. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  3. Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.CHECK DLC3


    Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

  1. Turn the ignition switch off.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D102-6 (CANH) - D102-14 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Front view of DLC3
    HINT:
    When the measured value is 133 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from "How to Proceed with Troubleshooting" (YARIS_NCP93 RM000001RSO05UX.html) after repairing the trouble area.


NG
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (DLC3 BRANCH WIRE)
OK


2.CHECK CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR)


    Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

  1. Disconnect the D147 No. 2 junction connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D147-10 (CANH) - D147-21 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 2 Junction Connector)


NG
Go to step 7
OK


3.CONNECT CONNECTOR

  1. Reconnect the D147 No. 2 junction connector.


NEXT


4.CHECK CAN MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY)
Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

  1. Disconnect the D100 combination meter assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D100-32 (CANH) - D100-31 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Combination Meter Assembly)


NG
Go to step 5
OK

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.html)

5.CONNECT CONNECTOR

  1. Reconnect the D100 combination meter assembly connector.


NEXT


6.CHECK CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

  1. Disconnect the D147 No. 2 junction connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D147-7 (CANH) - D147-18 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 2 Junction Connector)


NG
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
OK

REPLACE NO. 2 JUNCTION CONNECTOR

7.CONNECT CONNECTOR

  1. Reconnect the D147 No. 2 junction connector.


NEXT


8.CHECK CAN MAIN WIRE OR CONNECTOR (ECM)

  1. Disconnect the A72 ECM connector.



    Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A72-13 (CANH) - A72-26 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to ECM)
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B


B
REPLACE ECM (YARIS_NCP93 RM000001CN002IX.html)
A


9.CONNECT CONNECTOR

  1. Reconnect the A72 ECM connector.


NEXT


10.CHECK CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - ECM)
Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

  1. Disconnect the A73 and D146 No. 1 junction connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A73-9 (CANH) - A73-20 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 1 Junction Connector)


NG
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (ECM - NO. 1 JUNCTION CONNECTOR)
OK


11.CHECK CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Open In Can Main Bus Line

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D146-4 (CANH) - D146-15 (CANL)
    		Ignition switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 1 Junction Connector)


NG
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
OK

REPLACE NO. 1 JUNCTION CONNECTOR