CAN COMMUNICATION SYSTEM (for LHD), Diagnostic DTC:U0132

DTC Code DTC Name
U0132 Lost Communication with Suspension Control ECU

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0132 There is no communication from the absorber control ECU.

  • Power source or inside of absorber control ECU

  • Absorber control ECU CAN branch wire or connector

  • Absorber control ECU

WIRING DIAGRAM

A01FIILE01

INSPECTION PROCEDURE

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 Click here.

  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key, 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 engine 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.

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

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Drive the vehicle for 10 seconds or more at a speed of 20 km/h (12 mph) or more.

  • After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.

Tech Tips


  • Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

  • 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. RECONFIRM DTC OUTPUT


    • *1: w/o Dynamic Rear Steering System

    • *2: w/ Dynamic Rear Steering System


    1. Reconfirm DTCs.

      Tech Tips

      If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 2*1/sub bus 18*2 and sub bus 19*2 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 2*1/sub bus 18*2 and sub bus 19*2.

      Result
      Result Proceed to
      DTC U1002 is not output from network gateway ECU. A
      DTC U1002 is output from network gateway ECU (Sub Bus 2*1/Sub Bus 18*2). B
      DTC U1002 is output from network gateway ECU (Sub Bus 19). B

    B

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    C

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    A

  2. CHECK FOR OPEN IN CAN BUS WIRE (ABSORBER CONTROL ECU CAN BRANCH WIRE)


    1. w/o Dynamic Rear Steering System:


      1. A01FHEBE02
        Text in Illustration
        *a

        Rear view of wire harness connector

        (to Absorber Control ECU)

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

      2. Disconnect the absorber control ECU connector.

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

        Standard Resistance
        Sub Bus 2
        Tester Connection Condition Specified Condition
        N105-7 (CANH) - N105-8 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

    2. w/ Dynamic Rear Steering System:


      1. A01FHEBE01
        Text in Illustration
        *A Sub Bus 18
        *B Sub Bus 19
        *a

        Rear view of wire harness connector

        (to Absorber Control ECU)

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

      2. Disconnect the absorber control ECU connector.

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

        Standard Resistance
        Sub Bus 18
        Tester Connection Condition Specified Condition
        N105-7 (CANH) - N105-8 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
        Sub Bus 19
        Tester Connection Condition Specified Condition
        N105-20 (CA2H) - N105-21 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

    NG

    REPAIR OR REPLACE ABSORBER CONTROL ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL, CA2H, CA2L)

    OK

  3. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL ECU - BATTERY AND BODY GROUND)


    1. A01FHEBE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Absorber Control ECU)

      Connect the cable to the negative (-) battery terminal.

      Note

      When connecting the cable, some systems need to be initialized after the cable is reconnected Click here.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N105-3 (B) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N105-5 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ABSORBER CONTROL ECU Click here