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

DTC Code DTC Name
U0132 Lost Communication with Suspension Control ECU

SYSTEM DESCRIPTION

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

  • Power source or inside of suspension control ECU

  • Suspension control ECU CAN branch wire or connector

  • Suspension control ECU

WIRING DIAGRAM

A01H0LPE02

INSPECTION PROCEDURE

Note

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

Tech Tips

Operating the power 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 power switch off, waiting time may be required before disconnecting the cable from the auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notice before proceeding with work Click here.


    NEXT

  2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) auxiliary battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary 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. A01GWXUE01
      Text in Illustration
      *A Steering Bus
      *B Braking and Driving Bus
      *a

      Rear view of wire harness connector

      (to Suspension Control ECU)

      Disconnect the suspension control ECU connectors.

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

      Standard Resistance
      Steering Bus
      Tester Connection Switch Condition Specified Condition
      L88-7 (CANH) - L88-8 (CANL) Power switch off 54 to 69 Ω
      Braking and Driving Bus
      Tester Connection Switch Condition Specified Condition
      R1-22 (CA2H) - R1-21 (CA2L) Power switch off 54 to 69 Ω

    NG

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

    OK

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


    1. A01GXMQE05
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Suspension Control ECU)

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

      Note

      When disconnecting 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
      L88-1 (B) - Body ground Power 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
      L88-4 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SUSPENSION CONTROL ECU Click here