Toyota Avalon (XX50) 2019-2022 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.

Powertrain > Radar Cruise1 > Trouble Codes

Result	Proceed to
DTC P057504 and P057549 are not output.	A
DTC P057504 or P057549 is output.	B

USE SIMULATION METHOD TO CHECK

REPLACE HYBRID VEHICLE CONTROL ECU

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Toyota Avalon (XX50) 2019-2022 Owners Manual