Toyota Avalon Service & Repair Manual: Driving Support ECU Communication Abnormal (C1A52)

DESCRIPTION

The DTC C1A52 is stored when the Hybrid vehicle control ECU cannot recognize the driving support ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

C1A52

Driving Support ECU Communication Abnormal

Approximately 17 seconds after the power switch is turned on (IG), the Hybrid vehicle control ECU cannot recognize the driving support ECU assembly for approximately 1.3 seconds or more.

Hybrid vehicle control ECU

Does not come on

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the hybrid vehicle control ECU, refer to Registration.

Click here

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > Clear DTCs

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(c) Check for DTCs.

Powertrain > Radar Cruise2 > Trouble Codes

Result

Proceed to

DTC C1A52 is not output

A

DTC C1A52 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE HYBRID VEHICLE CONTROL ECU

    Front Radar Sensor Incorrect Axial Gap (C1A11,C1A14)

    Cruise Main Indicator Light Circuit

    See More:

    Toyota Avalon Service & Repair Manual > Dynamic Radar Cruise Control System(for Hv Model): Lost Communication with Vehicle Dynamics Control Module Missing Message (U012287-U110487)
    DESCRIPTION The Hybrid vehicle control ECU communicates with each sensor and ECU via CAN communication. If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored. DTC No. Detection Item DTC Detection Condition Trouble Area MIL U012287 Lost Co ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

    © 2023 Copyright www.tavalon.net
    0.0138