CAN COMMUNICATION SYSTEM Front Camera Module Communication Stop Mode

DTC Code DTC Name
Front Camera Module Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Front Camera Module Communication Stop Mode

Either condition is met:

  • "Front Camera Module" is not displayed on the CAN Bus Check screen of the GTS.

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  • Communication system DTCs (DTCs that start with U) that correspond to "Front Camera Module Communication Stop Mode" in "DTC Combination Table" are output.

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  • Pre-collision city sensor branch line or connector

  • Power source circuit of pre-collision city sensor

  • Pre-collision city sensor ground circuit

  • Pre-collision city sensor

WIRING DIAGRAM

C328708E02

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Note:

  • 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.

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  • 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 switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • 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.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

Tip:

  • Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

  1. CHECK FOR OPEN IN CAN BUS LINES (PRE-COLLISION CITY SENSOR BRANCH LINE)

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

    2. C328710C01

      *a

      Front view of wire harness connector

      (to Pre-collision City Sensor)

      Disconnect the M4 pre-collision city sensor connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M4-5 (CA1P) - M4-11 (CA1N)

      Cable disconnected from negative (-) battery terminal

      54 to 69 Ω

    Result

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (PRE-COLLISION CITY SENSOR)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

    1. C328710C02

      *a

      Front view of wire harness connector

      (to Pre-collision City Sensor)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M4-10 (GND) - Body ground

      Cable disconnected from negative (-) battery terminal

      Below 1 Ω

    2. Reconnect the cable to the negative (-) battery terminal.

    3. C328710C03

      *a

      Front view of wire harness connector

      (to Pre-collision City Sensor)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      M4-7 (IG1) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Result

    Result

    OK

    NG
    OK

    REPLACE PRE-COLLISION CITY SENSOR

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)