Dtc P1220 Timer Control Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TIMING CONTROL VALVE

INSPECT TIMING CONTROL VALVE (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (TIMING CONTROL VALVE - ECM)

CHECK FUEL FILTER ELEMENT SUB-ASSEMBLY

CHECK FUEL LEAK

REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY

CHECK READ OUTPUT DTC (DTC P1220 IS OUTPUT AGAIN)

DTC P1220 Timer Control Circuit


DESCRIPTION

The ECM controls the injection timing by actuating the timing control valve. The timing control valve is mounted on the injection or supply pump assembly and controls the internal fuel pressure of the pump through duty control.
The ECM detects the injection advance angle based on the TDC and NE signals.

DTC No.
DTC Detection Condition
Trouble Area
P1220
During and after engine warm up, actual injection timing is different from target value of ECM calculated for several second.
  1. Open or short in timing control valve circuit
  2. Timing control valve
  3. Fuel filter element sub-assembly (Clogging)
  4. Fuel (Freezing, air present)
  5. Injection or supply pump assembly (Internal pressure and timing control valve)
  6. ECM

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Control.Ecd System. Dtc P1220 Timer Control Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
1.INSPECT TIMING CONTROL VALVE

  1. Inspect the timer control valve (LandCruiser RM00000473G005X.html).



NG
REPLACE TIMING CONTROL VALVE
OK


2.INSPECT TIMING CONTROL VALVE (POWER SOURCE)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Control.Ecd System. Dtc P1220 Timer Control Circuit

  1. Disconnect the timing control valve connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C108-1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Timing Control Valve)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TIMING CONTROL VALVE - NO. 1 INTEGRATION RELAY)
OK


3.CHECK HARNESS AND CONNECTOR (TIMING CONTROL VALVE - ECM)

  1. Disconnect the timing control valve connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C108-2 - C161-11 (TCV)
    		Always
    		Below 1 Ω
    C108-2 or C161-11 (TCV) - Body ground
    		Always
    		10 kΩ or higher


NG
END
OK


4.CHECK FUEL FILTER ELEMENT SUB-ASSEMBLY

  1. Check the fuel filter element sub-assembly.



NG
REPLACE FUEL FILTER ELEMENT SUB-ASSEMBLY (LandCruiser RM0000014GD02TX.html)
OK


5.CHECK FUEL LEAK

  1. Visually check the injection or supply pump assembly, each injector and fuel line for fuel leaks (LandCruiser RM000001OM500BX_01_0001.html).

    OK:
    No leakage


NG
REPAIR FUEL LEAK
OK


6.REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY

  1. Replace the injection or supply pump assembly (LandCruiser RM0000010YN00KX.html).


NEXT


7.CHECK READ OUTPUT DTC (DTC P1220 IS OUTPUT AGAIN)

  1. Clear the DTC (LandCruiser RM000000VR600WX.html).

  1. Start the engine.

  1. Idle the engine for 20 sec. or more.

  1. Read the DTC (LandCruiser RM000000VR600WX.html).

    Result:

    Display (DTC output)
    		Proceed to
    DTC P1220 is output again
    		A
    No DTC output
    		B


B
END
A

REPLACE ECM (LandCruiser RM000000VW203FX.html)