Dtc C1544 High Engine Revolution Signal


DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

CHECK ENGINE TYPE

CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

DTC C1544 High Engine Revolution Signal


DESCRIPTION

The power steering ECU receives engine speed signals from the ECM via CAN communication. The power steering ECU 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.
  1. Engine control system
  2. CAN communication system
  3. Power steering ECU assembly

INSPECTION PROCEDURE

1.CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

  1. Check if DTC U0100 is output (LandCruiser RM00000275008XX.html).

    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
REPAIR CIRCUIT INDICATED BY OUTPUT CODE (LandCruiser RM00000277M0AVX.html)
A


2.CHECK ENGINE TYPE

  1. Check the engine type.

    Result
    Result
    		Proceed to
    1KD-FTV
    		A
    2TR-FE
    		B
    1GR-FE
    		C
    1GD-FTV
    		D



B
Go to step 4

C
Go to step 5

D
Go to step 6
A


3.CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

  1. Using the GTS, check for DTCs and confirm that there are no problems in the engine control system (LandCruiser RM000000PDK1DJX.html).

    Result
    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output.
    		B



B
GO TO ECD SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (LandCruiser RM0000031HW07LX.html)
A

REPLACE POWER STEERING ECU ASSEMBLY (LandCruiser RM000003FC0019X.html)

4.CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

  1. Using the GTS, check for DTCs and confirm that there are no problems in the engine control system (LandCruiser RM000000VNG00DX.html).

    Result
    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output.
    		B



B
GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (LandCruiser RM000000VNN00FX.html)
A

REPLACE POWER STEERING ECU ASSEMBLY (LandCruiser RM000003FC0019X.html)

5.CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

  1. Using the GTS, check for DTCs and confirm that there are no problems in the engine control system (LandCruiser RM000000PDK1DIX.html).

    Result
    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output.
    		B



B
GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (LandCruiser RM000002ZSO015X.html)
A

REPLACE POWER STEERING ECU ASSEMBLY (LandCruiser RM000003FC0019X.html)

6.CHECK OTHER DTC OUTPUT (ENGINE CONTROL SYSTEM)

  1. Using the GTS, check for DTCs and confirm that there are no problems in the engine control system (LandCruiser RM000000PDK1ENX.html for 1GD-FTV, LandCruiser RM000000PDK1E5X.html for 1GD-FTV (w/ Urea SCR System)).

    Result
    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output. (for 1GD-FTV)
    		B
    DTC is output. (for 1GD-FTV (w/ Urea SCR System))
    		C



B
GO TO ECD SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (LandCruiser RM0000031HW07PX.html)

C
GO TO ECD SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (LandCruiser RM0000031HW07OX.html)
A

REPLACE POWER STEERING ECU ASSEMBLY (LandCruiser RM000003FC0019X.html)