TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2179/79

DTC Code DTC Name
C2179/79 Tire Pressure Monitor ECU Communication Stop

DESCRIPTION

The main body ECU (multiplex network body ECU) sends signals to the tire pressure warning ECU and receiver via a direct line.

DTC No. DTC Detection Condition Trouble Area
C2179/79 Communication between the main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver is interrupted for 10 seconds or more.

  • Main body ECU (Multiplex network body ECU)

  • Wire harness or connector

  • Tire pressure warning ECU and receiver

WIRING DIAGRAM

A01HPZZE01

INSPECTION PROCEDURE

Note


  • When replacing the tire pressure warning ECU and receiver, read the IDs stored in the old ECU using the Techstream and write them down before removal.

  • It is necessary to perform registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

  • When replacing the tire pressure warning ECU and receiver on vehicles equipped with the wireless door lock control system (w/o smart key system), be sure to perform Registration of Recognition Code to register the transmitter IDs after ECU replacement Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the tire pressure warning ECU and receiver O25, O33 or N41 connector and main body ECU (multiplex network body ECU) I13 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      O25-5 (PRG) - I13-4 (PRG)*1

      O33-5 (PRG) - I13-4 (PRG)*2

      N41-5 (PRG) - I13-4 (PRG)*3

      		 Always Below 1 Ω

      O25-5 (PRG) - Body ground*1

      O33-5 (PRG) - Body ground*2

      N41-5 (PRG) - Body ground*3

      		 Always 10 kΩ or higher

      • *1: w/o Intuitive Parking Assist System with Wireless Door Lock Control System

      • *2: w/o Intuitive Parking Assist System without Wireless Door Lock Control System

      • *3: w/ Intuitive Parking Assist System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER


    1. Replace the tire pressure warning ECU and receiver Click here.


    NEXT

  3. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    4. Check for DTCs Click here.

      OK
      DTC C2179/79 is not output.

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    OK

    END