LIN COMMUNICATION SYSTEM, Diagnostic DTC:U1130

DTC Code DTC Name
U1130 Lost Communication with Rear Climate Control Seat ECU RH

DESCRIPTION

This DTC is output when LIN communication between the rear seat climate control ECU RH and rear power seat module switch stops for 10 seconds or more.

DTC Code DTC Detection Condition Trouble Area
U1130 No communication between rear seat climate control ECU RH and rear power seat module switch for 10 seconds or more

  • Rear seat climate control ECU RH

  • Rear power seat module switch

  • Harness or connector

WIRING DIAGRAM

A01GYL7E12

INSPECTION PROCEDURE

Note


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

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

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

Tech Tips

When DTC U0211, U0246, U1130 and U1131 are output simultaneously, perform troubleshooting for "Rear Side Switch Module LIN Communication Malfunction" first Click here.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  2. CHECK FOR DTC


    1. Recheck for DTC Click here.

      Result
      Result Proceed to
      DTC U1130 output reoccurs A
      DTC U1130 output does not reoccur B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT SWITCH - SEAT CLIMATE CONTROL ECU)


    1. A01H0E5E28

      Disconnect the z54*1 or S15*2 module switch connector.


      • *1: except 4-Passenger with Ottoman

      • *2: for 4-Passenger with Ottoman

    2. Disconnect the f8 ECU connector.

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

      Standard resistance
      except 4-Passenger with Ottoman:
      Tester Connection Condition Specified Condition
      z54-12 (MPX) - f8-13 (LIN) Always Below 1 Ω
      for 4-Passenger with Ottoman:
      Tester Connection Condition Specified Condition
      S15-5 (MPX) - f8-13 (LIN) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - BATTERY AND BODY GROUND)


    1. A01GYC4E04

      Disconnect the f8 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f8-11 (VER) - Body ground Always Below 1 Ω
      f8-12 (GND) - Body ground Always Below 1 Ω
      Standard voltage
      Tester Connection Condition Specified Condition
      f8-1 (IG) - Body ground Power switch off Below 1 V
      f8-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      f8-2 (SYSB) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK REAR SEAT CLIMATE CONTROL ECU RH (OPERATION)


    1. Temporarily replace the rear seat climate control ECU RH with a new or normally functioning one.


    2. Clear the DTC Click here.


    NEXT

  6. CHECK FOR DTC


    1. Recheck for DTC Click here.

      Result
      Result Proceed to
      DTC U1130 output does not reoccur A
      DTC U1130 output reoccurs (for 4-Passenger with Ottoman) B
      DTC U1130 output reoccurs (for 5-Passenger with Ottoman) C
      DTC U1130 output reoccurs (for Power Seat) D
      DTC U1130 output reoccurs (for Fixed Seat Type) E

    B

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    C

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    D

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    E

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    A

    END (REAR SEAT CLIMATE CONTROL ECU RH IS DEFECTIVE)