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

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

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

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HINT:

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

A

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

B

GO TO METER / GAUGE SYSTEM