Toyota Avalon Service & Repair Manual: Cruise Control System Internal Failure (P057504,P057549)

DESCRIPTION

This DTC is stored when there is a malfunction in the hybrid vehicle control ECU.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

P057504

Cruise Control System Internal Failure

While the dynamic radar cruise control system is operating, the dynamic radar cruise control system control of vehicle speed is not canceled and approximately 0.4 seconds have elapsed since cruise cancel signal (STP signal) is received by the hybrid vehicle control ECU.

Hybrid vehicle control ECU

Does not come on

P057549

Cruise Control Internal Electronic Failure

When the power switch is on (IG), STP signals received by the hybrid vehicle control ECU supervisory CPU and that received by the control ECU do not match for approximately 0.2 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 Cruise1 > 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 Cruise1 > Trouble Codes

Result

Proceed to

DTC P057504 and P057549 are not output.

A

DTC P057504 or P057549 is output.

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE HYBRID VEHICLE CONTROL ECU

    Brake Switch "A" Signal Compare Failure (P057162)

    Brake System (P157800)

    See More:

    Toyota Avalon Service & Repair Manual > Hybrid Control System: Inverter Low-voltage Circuit
    DESCRIPTION The cause of the malfunction may be the low-voltage circuit. Check whether there is an open circuit in the inverter +B low-voltage power source system or a problem in the communication between the hybrid vehicle control ECU and inverter. Related Parts Check Area Inspection Inverter +B lo ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

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