Dtc C1541 Vehicle Speed Signal Malfunction

Steering. Corolla. Zre142 Aze141
Power Assist Systems. Corolla. Zre142 Aze141

DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)

DTC C1541 Vehicle Speed Signal Malfunction


DESCRIPTION

The power steering ECU 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.
If the ECU detects this DTC, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues the system control.

DTC No.
DTC Detection Condition
Trouble Area
C1541
This DTC is detected when vehicle speed signals via CAN communication are cut off for 3 seconds or more.
  1. Speed sensor circuit
  2. Skid control ECU
  3. CAN communication system
  4. Power steering ECU

INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305CX.html).
1.CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

  1. Check if DTC U0129 is output.

    Result:
    Result
    		Proceed to
    DTC is not output
    		A
    U0129 is output
    		B
    HINT:
    DTC U0129 indicates a ABS ECU communication malfunction in the power steering system.


B
GO TO CAN COMMUNICATION SYSTEM (COROLLA_ZRE142 RM000000WI60ACX.html)
A


2.CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)

  1. Check for DTCs of the brake control system.

    HINT:
    1. Anti-lock brake system: COROLLA_ZRE142 RM000000XHV0F3X.html.
    2. Vehicle stability control system: COROLLA_ZRE142 RM000000XHV0F2X.html.
    Result:
    Result
    		Proceed to
    DTC is not output
    		A
    C0200 or C0210 is output (for Anti-lock Brake System)
    		B
    C0200 or C0210 is output (for Vehicle Stability Control System)
    		C
    HINT:
    These DTCs indicate a speed sensor signal malfunction in the Anti-lock Brake System or Vehicle Stability Control System.
    NOTICE:
    If replacing the power steering ECU, initialize the rotation angle sensor and calibrate the torque sensor zero point (COROLLA_ZRE142 RM00000275305CX.html).


B
REPAIR CIRCUIT INDICATED BY OUTPUT CODE (for Anti-lock Brake System) (COROLLA_ZRE142 RM000000XHU0A6X.html)

C
REPAIR CIRCUIT INDICATED BY OUTPUT CODE (for Vehicle Stability Control System) (COROLLA_ZRE142 RM000000XHU0A5X.html)
A

REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605AX.html)