CAN COMMUNICATION SYSTEM > Open in CAN Main Wire

for Preparation Click here


DESCRIPTION

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

Symptom
Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is 69 Ω or higher.
  1. CAN main wire and connector
  2. No. 1 junction connector
  3. No. 2 junction connector
  4. ECM
  5. Combination Meter ECU

WIRING DIAGRAM


C226557E01


INSPECTION PROCEDURE

HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.PRECAUTION

NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).

NEXT


2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

NEXT


3.CHECK DLC3


    C226869E15
  1. Disconnect the J118 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
    J118-2 (CANH) - J17-6 (CANH)
    Ignition switch OFF
    Below 1 Ω
    J118-13 (CANL) - J17-14 (CANL)
    Ignition switch OFF
    Below 1 Ω


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)
OK


4.CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM)


    C198236E91
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Switch Condition
    Specified Condition
    J118-1 (CANH) - J118-12 (CANL)
    Ignition switch OFF
    108 to 132 Ω


NG
Go to step 6
OK


5.CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ECU)


    C198236E92
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Switch Condition
    Specified Condition
    J118-4 (CANH) - J118-15 (CANL)
    Ignition switch OFF
    108 to 132 Ω


NG
Go to step 11
OK

REPLACE NO. 1 JUNCTION CONNECTOR 

6.CONNECT CONNECTOR
  1. Reconnect the J118 No. 1 junction connector.


NEXT


7.CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - ECM)


    C198236E63
  1. Disconnect the J113 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
    J113-3 (CANH) - J113-14 (CANL)
    Ignition switch OFF
    108 to 132 Ω


NG
Go to step 9
OK


8.CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)


    C198236E64
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Switch Condition
    Specified Condition
    J113-4 (CANH) - J113-15 (CANL)
    Ignition switch OFF
    108 to 132 Ω


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

REPLACE NO. 2 JUNCTION CONNECTOR 

9.CONNECT CONNECTOR
  1. Reconnect the J113 No. 2 junction connector.


NEXT


10.CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 2 JUNCTION CONNECTOR)


    C159493E01
  1. Disconnect the A24 ECM connector.

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

    Standard resistance:
    Tester Connection
    Switch Condition
    Specified Condition
    A24-10 (CANH) - A24-11 (CANL)
    Ignition switch OFF
    108 to 132 Ω
    Result 
    Result
    Proceed to
    OK (for 1GR-FE)
    A
    OK (for 1UR-FE)
    B
    OK (for 3UR-FE)
    C
    OK (for 3UR-FBE)
    D
    NG
    E


B
REPLACE ECM (Click here)

C
REPLACE ECM (Click here)

D
REPLACE ECM (Click here)

E
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 2 JUNCTION CONNECTOR)
A

REPLACE ECM (Click here)  

11.CONNECT CONNECTOR
  1. Reconnect the J118 No. 1 junction connector.


NEXT


12.CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ECU - NO. 1 JUNCTION CONNECTOR)


    C159487E08
  1. Disconnect the J28 combination meter ECU connector.

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

    Standard resistance:
    Tester Connection
    Switch Condition
    Specified Condition
    J28-33 (CANH) - J28-34 (CANL)
    Ignition switch OFF
    108 to 132 Ω


NG
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ECU (COMBINATION METER ECU - NO. 1 JUNCTION CONNECTOR)
OK

REPLACE COMBINATION METER ASSEMBLY (Click here)