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 > Airbag System: Curtain Shield Airbag Sensor (RH) (B1630,B1632)
DESCRIPTION The side collision sensor RH circuit (bus 1) consists of the airbag sensor assembly, door side airbag sensor RH and rear airbag sensor RH. The door side airbag sensor RH and rear airbag sensor RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Panoramic Moon Roof System: Terminals Of Ecu
TERMINALS OF ECU CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) (a) Disconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector. (b) Measure the resistance and voltage according to the value(s) in the table below. HINT: Measure the values on the wire harness side with ...
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
0.0147