Toyota Yaris: Dynamic Radar Cruise Control System / Cruise Control System Internal Failure (P057504,P057549)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Cruise Control System Internal Failure (P057504,P057549)

DESCRIPTION

When the ECM detects an internal malfunction, DTC P057504 or P057549 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

P057504

Cruise Control System Internal Failure

When the dynamic radar cruise control system is operating, the ECM detects a malfunction in the internal cancel circuit for 0.4 seconds or more.

ECM

Radar Cruise1

P057549

Cruise Control Internal Electronic Failure

When the dynamic radar cruise control system is operating, the ECM detects a malfunction in the internal STP signal circuit for 0.2 seconds or more.

ECM

Radar Cruise1

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Service Bulletin.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > Clear DTCs
NEXT

2.

CHECK FOR DTCs

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

HINT:

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

(b) 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 ECM

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