Toyota Yaris: 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
|
| 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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Supplemental Restraint System (SRS) Precautions
The front and side supplemental restraint systems (SRS) include different types of air bags. Please verify the different types of air bags which are equipped on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators are visible in the area where the air bags are installed.
The air bags are installed in the following locations:
The steering wheel hub (driver air bag) The front passenger dashboard (front passenger air bag) The outboard sides of the front seatbacks (side air bags) The front and rear window pillars, and the roof edge along both sides (curtain air bags)