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.

  • Brake control system
  • CAN communication system
  • Power steering ECU assembly

On

After normal confirmation

CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU assembly has been replaced, perform assist map writing.

Click here

PROCEDURE

1.

CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Check if DTC U0129 is output.

Click here

Chassis > EMPS > Trouble Codes
U0129 is output

GO TO CAN COMMUNICATION (HOW TO PROCEED WITH TROUBLESHOOTING)

U0129 is not output

2.

CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)

(a) Check for brake control system DTCs.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes
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:

 Abbreviations Used In Manual

ABBREVIATIONS USED IN MANUAL Abbreviation Meaning ABS Anti-Lock Brake System A/C Air Conditioner AC Alternating Current ACC Accessory ACIS Acoustic Control Induction System ACM Active Control Engine Mount ACSD Automatic Cold Start Device ACT Actua

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