Lexus NX: Vehicle Speed Signal (C1541)
DESCRIPTION
The power steering ECU assembly receives vehicle speed signals from the skid control ECU 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 |
|---|---|---|---|---|---|
| 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.
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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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SEE MORE:
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. INSTALL DOOR SIDE AIRBAG SENSOR LH (a) Check that the power switch is off. (b) Check that the cable is disconnected from the negative (-) aux
Operation Check
OPERATION CHECK AUTOMATIC HIGH BEAM SYSTEM OPERATION CHECK (a) Check the operation of the automatic high beam indicator light. *a Automatic High Beam Indicator Light NOTICE: If the forward recognition camera cannot correctly recognize the front due to bad weather (dense fog, etc.) or obstru
