CRUISE CONTROL SYSTEM(for 8NR-FTS), Diagnostic DTC:P057504, P057549

DTC Code	DTC Name
P057504	Cruise Control System Internal Failure
P057549	Cruise Control Internal Electronic Failure

DESCRIPTION

This DTC is stored when there is a malfunction in the ECM.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P057504	Cruise Control System Internal Failure	While the cruise control system is operating, the cruise control system control of vehicle speed is not canceled and approximately 0.4 seconds have elapsed after cruise cancel signal (STP signal) is input to the ECM.	ECM
P057549	Cruise Control Internal Electronic Failure	When the ignition switch ON, STP signals input to the ECM supervisory CPU and that input to the control ECU do not match for approximately 0.2 seconds or more.	ECM

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

Tech Tips

The ECM receives signals from each sensor to control all functions of the cruise control system. When a malfunction is detected, the fail-safe function operates until the ignition switch off.

PROCEDURE

CHECK FOR DTCs (CRUISE CONTROL SYSTEM)

Clear the DTCs.

Click here

Powertrain > Cruise Control > Clear DTCs
Perform the following to make sure that the DTC detection conditions are met.
Tech Tips

If the detection conditions are not met, the malfunction cannot be detected.
1. Drive the vehicle at a speed for which cruise control operation is possible.
2. Turn the cruise control system on using the cruise control main switch (ON/OFF button).
3. Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.
4. Depress the brake pedal for 0.4 seconds or more.

Check for DTCs.

Click here

Powertrain > Cruise Control > Trouble Codes

OK
DTC P057504 and P057549 are not output.

Result

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK Click here

REPLACE ECM Click here