Lexus RX (RX 350L, RX450h) 2016-2024 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.
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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) |
|
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| 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) 2016-2024 Repair Manual > Audio And Visual System (for 8 Inch Display): AVC-LAN Circuit
DESCRIPTION Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transmits signals via AVC-LAN communication. If a short to +B or short to ground occurs in an AVC-LAN communication line, the audio and visual system will not function normally because communication is ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Park / Neutral Position Switch: On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. SECURE VEHICLE (a) Fully apply the parking brake and chock a wheel. CAUTION:
Make sure to apply the parking brake and chock a wheel before performing this procedure.
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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