Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: 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 | MIL | 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 | Does not come on | Cruise Control |
| 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 | Does not come on | Cruise Control |
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the ECM, refer to Registration.
Click here .gif)
PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Clear the DTCs.
Powertrain > Cruise Control > Clear DTCs(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Powertrain > Cruise Control > Trouble Codes| Result | Proceed to |
|---|---|
| DTC P057504 and P057549 are not output | A |
| DTC P057504 or P057549 is output | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE ECM |
Brake Switch "A" Signal Compare Failure (P057162)
DESCRIPTION When the brake pedal is depressed, the stop light switch assembly outputs a signal to the ECM. The ECM uses this signal to control cancellation of vehicle speed by the dynamic radar cruise ...
Brake System (P157800)
DESCRIPTION When a malfunction in the vehicle stability control system is detected, DTC P157800 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Intelligent Clearance Sonar System: Utility
UTILITY FREEZE FRAME DATA NOTICE:
Freeze frame data is stored and updated each time the brakes are operated. Only the latest 30 sets of data are stored.
Using the Techstream, make sure to save the data before performing a reproduction test as the data will be updated. HINT: The freeze frame dat ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Cylinder Head: Inspection
INSPECTION CAUTION / NOTICE / HINT HINT:
Use the same procedure for bank 1 and bank 2.
The following procedure is for bank 2.
PROCEDURE 1. INSPECT CYLINDER HEAD LH (a) Using a precision straightedge and feeler gauge, check the surfaces which contact the cylinder block sub-assembly and manifo ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0092