Lexus NX: Vehicle Speed Signal (C1541)
DESCRIPTION
The power steering ECU assembly receives vehicle speed signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication. The ECU provides appropriate assisting 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. |
| On | After normal confirmation | - |
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 OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM) |
(a) Check if DTC U0129 is output.
Click here
| U0129 is output | .gif) | GO TO CAN COMMUNICATION (HOW TO PROCEED WITH TROUBLESHOOTING) |
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| 2. | CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM) |
(a) Check for brake control system DTCs.
Click here
| DTCs are not output. | | REPLACE POWER STEERING ECU ASSEMBLY |
| DTCs are output. | | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
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DESCRIPTION When a problem occurs in the power steering system, the power source relay circuit is shut off to stop the power assist. DTC No. Detection Item DTC Detection Condition Trouble Are
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DESCRIPTION Based on the ECM signal, the power steering ECU assembly determines if the correct type of ECM is installed. DTC No. Detection Item DTC Detection Condition Trouble Area Warning
SEE MORE:
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