Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Vehicle Speed Information Communication Lost (C2178)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Suspension / Tire Pressure Monitoring / Tire Pressure Warning System(for Gasoline Model) / Vehicle Speed Information Communication Lost (C2178)

DESCRIPTION

The tire pressure warning ECU and receiver receives signals from the combination meter assembly via CAN communication. If a malfunction occurs in this communication line, DTC C2178 is output.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

C2178

Vehicle Speed Information Communication Lost

Communication between the combination meter assembly and tire pressure warning ECU and receiver is interrupted for 10 seconds or more.
  • Meter / gauge system
  • Tire pressure warning ECU and receiver

-

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the Techstream and write them down before removal.
  • It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

PROCEDURE

1.

INSPECT COMBINATION METER ASSEMBLY (ON-VEHICLE INSPECTION)

(a) Perform On-vehicle Inspection of the meter/gauge system.

Click here

HINT:

Check the meter function by referring to On-vehicle Inspection for the combination meter assembly.

Result

Proceed to

Combination meter assembly is normal

A

Combination meter assembly is malfunctioning

B
A

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

B

GO TO METER / GAUGE SYSTEM

    Initialization not Completed (C2177)

    Tire Pressure Monitor ECU Communication Stop (C2179)

    See More:

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Main Body Ecu: Removal
    REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during main body ECU (multiplex network body ECU) removal/installation are shown below. Necessary Procedure Af ...

    Toyota Avalon (XX50) 2019-2022 Owners Manual

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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