CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P057504,P057549; Cruise Control System Internal Failure; 2018 - 2020 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM1000000018WRO
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P057504,P057549; Cruise Control System Internal Failure; 2018 - 2020 MY Sienna [11/2017 - ]

DTC

P057504

Cruise Control System Internal Failure

DTC

P057549

Cruise Control Internal Electronic Failure

DESCRIPTION

This DTC indicates a malfunction in the ECM.

HINT:

The ECM receives signals from each sensor to control all the functions of the cruise control with the microcomputer. When a malfunction is detected, fail-safe remains on until the ignition switch is turned off.

DTC No.	DTC Detection Condition	Trouble Area	MIL
P057504	ECM has a supervisory CPU and control ECU inside. When each input STP signal is different for 0.15 seconds or more, this trouble code is output. This trouble code is also output after 0.4 seconds have passed from the time a cruise cancel input signal (STP input) is input to the ECM.	ECM	Does not come on
P057549	When the ignition switch is off, STP signals received by the ECM supervisory CPU and that received by the control ECU do not match for approximately 0.2 seconds or more.	ECM	Does not come on

PROCEDURE

1.	CHECK FOR DTCs (RADAR CRUISE 1)

(a) Clear the DTCs.

Click here

(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the following conditions are not met, the malfunction cannot be detected.

Drive the vehicle at a speed for which dynamic radar cruise control operation is possible.
Turn the cruise control system on using the cruise control main switch (ON-OFF button).
Depress the brake pedal for 0.4 seconds or more.

Click here

OK:

DTC P057504 and P057549 are not output.

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK

REPLACE ECM