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 suspension control ECU.

  • Power source circuit of suspension control ECU

  • Suspension control ECU branch wire or connector

  • Suspension control ECU

WIRING DIAGRAM

A01X3GNE05

CAUTION / NOTICE / HINT

Note

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

Tech Tips

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

PROCEDURE


  1. PRECAUTION

    Note

    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 CAN main wire and the CAN branch wire.

      CAUTION:

      For vehicle with an SRS system:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note

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


    NEXT

  3. CHECK FOR OPEN IN CAN BUS WIRE (SUSPENSION CONTROL ECU CAN BRANCH WIRE)


    1. A01X2KEE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Suspension Control ECU)

      Disconnect the K34 suspension control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      K34-7 (CANH) - K34-8 (CANL) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE SUSPENSION CONTROL ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

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


    1. A01X7LJE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Suspension Control ECU)

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

      Note

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

    2. Disconnect the K35 suspension control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K34-3 (BAT2) - Body ground Always 11 to 14 V
      K35-1 (BAT) - Body ground Always 11 to 14 V
      K34-5 (IG) - Body ground Ignition switch ON 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K34-1 (GND) - Body ground Always Below 1 Ω
      K35-6 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE SUSPENSION CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR