C1541

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1541; Vehicle Speed Signal Malfunction; 2013 MY FR-S [03/2012 -]
C1541 - Vehicle Speed Signal Malfunction

DESCRIPTION

The power steering ECU assembly receives vehicle speed signals from the skid control ECU via CAN communication. The power steering ECU assembly provides appropriate assisting force in accordance with the vehicle speed, based on the signals.

If the power steering ECU assembly stores this DTC, it adjusts the amount of power assist to the amount provided for a speed of 100 km/h (62 mph) and continues the system control.





INSPECTION PROCEDURE

NOTICE:
If the power steering ECU assembly is replaced with a new one, perform rotation angle sensor initialization and torque sensor zero point calibration Programming and Relearning.

PROCEDURE

1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Check if DTC U0416 is output Reading and Clearing Diagnostic Trouble Codes.

Result





HINT
DTC U0416 indicates a skid control ECU communication malfunction in the power steering system.

B -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the brake control system Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Vehicle Stability Control System

A -- REPLACE POWER STEERING ECU ASSEMBLY Removal