Toyota Yaris: Cxpi Communication System / System Description

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Power Source & Network / Networking / Cxpi Communication System / System Description

SYSTEM DESCRIPTION

CXPI COMMUNICATION SYSTEM DESCRIPTION

The multiplex communication system [CXPI] is used for communication systems between body system components. When communication fails due to an open circuit, etc. on the communication line, the function that outputs a DTC related to the circuit according to the control master ECU and the fail-safe function that maintains minimum performance and protects the system activate. (The following shows the communication system and connected ECUs.)

HINT:

  • Each component has a fail-safe function which activates to maintain the minimum performance of the system and protect the system.
  • In the following table, "○" indicates that the function applies, and "-" indicates that it does not.

Component

Master Control

CXPI Communication DTC Output Function

Main body ECU (multiplex network body ECU)

Output function enabled

Semiconductor power integration ECU

-

Output function disabled

Power distribution box assembly

-

Output function disabled

LOAD OPERATION OUTPUT

(a) Controls the load on and off based on multiplex communication signals.

Load

Semiconductor power integration ECU

Power distribution box assembly

Supports operation signal communication

Light control LED ECU RH

Light control LED ECU LH

-

Not supported

Fog light assembly RH

Fog light assembly LH

-

Supported

Rear window defogger

Mirror heater

-

Supported

Not supported

Rear taillight

-

Supported

Rear fog light LED

-

Supported

Outer rear view mirror assembly RH (outer mirror retractor RH)

Outer rear view mirror assembly LH (outer mirror retractor LH)

-

Supported

Panel light

-

Supported

Blower motor with fan sub-assembly

-

Not supported

Front seat heater RH (w/ Seat Heater System)

ON/OFF

-

Not supported

HI/LO

-

Not supported

Front seat heater LH (w/ Seat Heater System)

ON/OFF

-

Not supported

HI/LO

-

Not supported

IGR relay

-

Not supported

    System Diagram

    S..

    How To Proceed With Troubleshooting

    CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the CXPI communication system. *: Use the GTS. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2...

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