Toyota 4Runner manuals

Toyota 4Runner: High Engine Revolution Signal (C1544)

DESCRIPTION

The power steering ECU assembly receives engine speed signals from the ECM via CAN communication. The power steering ECU assembly provides appropriate assisting force in accordance with the engine speed signal.

DTC Code

DTC Detection Condition

Trouble Area

C1544

An abnormal engine speed signal is received.

  • SFI system
  • CAN communication system
  • Power steering ECU assembly

PROCEDURE

1.

CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Check if DTC U0100 is output (See page ).


Result

Result

Proceed to

DTC U0100 is not output

A

DTC U0100 is output

B

HINT:

DTC U0100 indicates a CAN communication malfunction in the power steering system.


B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)


A

2.

CHECK OTHER DTC OUTPUT (SFI SYSTEM)

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the SFI system (See page ).


Result

Result

Proceed to

DTC is not output

A

DTC is output

B


A

REPLACE POWER STEERING ECU ASSEMBLY


B

GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

Vehicle Speed Signal (C1541)
DESCRIPTION The power steering ECU assembly receives vehicle speed signals from the master cylinder solenoid (skid control ECU) via CAN communication. The power steering ECU assembly provides app ...

Power Steering Warning Light Circuit
DESCRIPTION The power steering ECU assembly is connected to the combination meter assembly via CAN communication. If the power steering ECU assembly detects a malfunction, the power steering warn ...

Other materials about Toyota 4Runner:

Speedometer Malfunction
DESCRIPTION The combination meter receives vehicle speed signals from the skid control ECU via the CAN communication line. The wheel speed sensors output voltages that vary according to the vehicle speed. The skid control ECU supplies power to the wheel ...

Lost Communication with Door Side Airbag Sensor RH (B1692/81,B1697/82)
DESCRIPTION The circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH) is composed of the center airbag sensor, rear airbag sensor LH or RH and side airbag sensor ...

© 2016-2022 | www.to4runner.net

0.1119