LIN COMMUNICATION SYSTEM Rain Sensor LIN Communication Malfunction

DTC Code DTC Name
Rain Sensor LIN Communication Malfunction

DESCRIPTION

The LIN communication of the components related to the rain sensor occurs between the rain sensor and windshield wiper relay.

WIRING DIAGRAM

E179672E04

CAUTION / NOTICE / HINT

Note:
  • When using the intelligent tester with the ignition switch off to troubleshoot:

    Connect the intelligent tester to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.

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

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - WINDSHIELD WIPER RELAY)

    1. U123944E02

      Disconnect the H56 relay connector.

    2. Disconnect the Q5 sensor connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Q5-1 (MPX) - H56-14 (SPD)

      Always

      Below 1 Ω

      Q5-3 (SIG) - H56-13 (SIG)

      Always

      Below 1 Ω

      Q5-2 (ES) - H56-7 (ES)

      Always

      Below 1 Ω

      Q5-1 (MPX) - Body ground

      Always

      10 kΩ or higher

      Q5-3 (SIG) - Body ground

      Always

      10 kΩ or higher

      Q5-2 (ES) - Body ground

      Always

      10 kΩ or higher

      H56-12 (E) - Body ground

      Always

      Below 1 Ω

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H56-2 (IG) - Body ground

      Ignition switch ON

      11 to 14 V

      Table 1. Text in Illustration

      *1

      Front view of wire harness connector

      (to Windshield Wiper Relay)

      *2

      Front view of wire harness connector

      (to Rain Sensor)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  2. CHECK WINDSHIELD WIPER RELAY ASSEMBLY

    U123929E02
    1. Connect the H56 relay connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H56-13 (SIG) - H56-7 (ES)

      Ignition switch ON

      11 to 14 V

      Table 2. Text in Illustration

      *1

      Component with harness connected

      (Windshield Wiper Relay)

      Table 3. Result

      Result

      Proceed to

      OK

      A

      NG (for LHD)

      B

      NG (for RHD)

      C

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

  3. REPLACE RAIN SENSOR

    1. Temporarily replace the rain sensor with a new one (Click here).

    2. Check that the rain sensor function is normal.

      OK

      Rain sensor function is normal.

      Table 4. Result

      Result

      Proceed to

      OK

      A

      NG (for LHD)

      B

      NG (for RHD)

      C

    END (RAIN SENSOR IS DEFECTIVE)

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY