| 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 hybrid vehicle control ECU.
| 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 hybrid vehicle control ECU. | Hybrid vehicle control ECU |
| P057549 | Cruise Control Internal Electronic Failure | When the power switch is on (IG), STP signals input to the hybrid vehicle control ECU supervisory CPU and that input to the control ECU do not match for approximately 0.2 seconds or more. | Hybrid vehicle control ECU |
CAUTION / NOTICE / HINT
Note
Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.
Tech Tips
The hybrid vehicle control ECU 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 power switch is turned off.
PROCEDURE
CHECK FOR DTCS (DTC P057504 AND P057549)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Clear the 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.
Drive the vehicle at a speed for which cruise control system operation is possible.
Turn the cruise control system on using the cruise control main switch (ON-OFF).
Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.
Check for DTCs.
| Result | ||||||
|---|---|---|---|---|---|---|
|
| A |
|
USE SIMULATION METHOD TO CHECK Click here |
| B |
|
REPLACE HYBRID VEHICLE CONTROL ECU Click here |