Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Vehicle Speed Signal (C1541)
DESCRIPTION
The power steering ECU assembly receives vehicle speed signals from the skid control ECU (brake actuator assembly) via CAN communication. The ECU provides appropriate assist force in accordance with the vehicle speed based on the signals.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| C1541 | Vehicle Speed Signal | Vehicle speed signals via CAN communication are cut off for 3 seconds or more. |
| EPS warning light: Comes on | The ECU judges the system has returned to normal or the power switch is turned on (IG) again | - |
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
Click here .gif)
PROCEDURE
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check if DTC U0129 is output.
Click here
| Result | Proceed to |
|---|---|
| DTC U0129 is not output. | A |
| DTC U0129 is output. | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
.gif)
| 2. | CHECK BRAKE CONTROL SYSTEM |
(a) Using the Techstream, check for DTCs and confirm that there are no malfunctions in the brake control system.
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| A | | REPLACE POWER STEERING ECU ASSEMBLY |
| B | | GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
Short in Motor Circuit (C1521-C1523,C1528,C1531-C1555)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note C1521 Short in Motor Circuit Motor overcurrent Power s ...
IG Power Supply Voltage (C1551)
DESCRIPTION The power steering ECU assembly distinguishes the engine switch status as on (IG) or off through the IG power source circuit. DTC No. Detection Item DTC Detection Condition Troubl ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Vehicle Stability Control System: ABS Pump Motor Actuator Stuck (C142771)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area C142771 ABS Pump Motor Actuator Stuck Actuator pump motor does not operate properly.
Wire harness and connector
Brake actuator assembly (Pump motor)
Brake actuator assembly (Pump motor circuit)
WI ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Refrigerant Line: Installation
INSTALLATION PROCEDURE 1. INSTALL PIPING CLAMP (a) for Low Pressure: (1) Remove the vinyl tape from the open ends of the No. 2 air conditioner tube and accessory assembly and suction hose sub-assembly. (2) Install a new piping clamp to the suction hose sub-assembly. NOTICE:
Securely engage t ...
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
0.0182