Dtc 14 (4) Timing Control System Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TIMING CONTROL VALVE

CHECK ECM (TCV VOLTAGE)

CHECK ECM (TCV VOLTAGE, SIGNAL)

CHECK FUEL FILTER

CHECK FUEL LEAK

CHECK TIMING CONTROL VALVE (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (ECM - INTEGRATION RELAY [MAIN RELAY])

DTC 14 (4) Timing Control System Malfunction


DESCRIPTION

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

DTC No.
DTC Detection Condition
Trouble Area
14 (4)
During and after engine warm up, actual injection timing is different from target value of ECM calculated for several sec.
  1. Open or short in timing control valve circuit
  2. Timing control valve
  3. Fuel filter (clogging)
  4. Fuel (frozen, air present)
  5. Injection pump (internal pressure and timing control valve)
  6. ECM

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.5L-E Engine Control System.Ecd System. Dtc 14 (4) Timing Control System Malfunction


INSPECTION PROCEDURE

1.INSPECT TIMING CONTROL VALVE


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.5L-E Engine Control System.Ecd System. Dtc 14 (4) Timing Control System Malfunction

  1. Disconnect the timing control valve connector.

  1. Measure the resistance of the timing control valve.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		10 to 14 Ω


NG
REPLACE TIMING CONTROL VALVE
OK


2.CHECK ECM (TCV VOLTAGE)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.5L-E Engine Control System.Ecd System. Dtc 14 (4) Timing Control System Malfunction

  1. Disconnect the E20 ECM connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    E20-11 (TCV) - Body ground
    		9 to 14 V


NG
Go to step 6
OK


3.CHECK ECM (TCV VOLTAGE, SIGNAL)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.5L-E Engine Control System.Ecd System. Dtc 14 (4) Timing Control System Malfunction

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    E20-11 (TCV) - E20-14 (E1)
    		9 to 14 V

  1. While idling, measure the waveform according to the value(s) in the table below.

    OK:
    Tester Connection
    		Specified Condition
    E20-11 (TCV) - E20-14 (E1)
    		Correct waveform is as shown
    Tool Setting
    		Condition
    10 V/DIV., 10 msec./DIV.
    		During idling


NG
REPLACE ECM
OK


4.CHECK FUEL FILTER

  1. Check the fuel filter (Toyota Fortuner RM0000014YY008X.html).



NG
REPLACE FUEL FILTER
OK


5.CHECK FUEL LEAK

  1. Visually check the injection pump, each injector and fuel line for fuel leaks.

    OK:
    No leakage


NG
REPAIR OR REPLACE PART WITH FUEL LEAKAGE
OK

CHECK AND REPLACE INJECTION PUMP ASSEMBLY

6.CHECK TIMING CONTROL VALVE (POWER SOURCE)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.5L-E Engine Control System.Ecd System. Dtc 14 (4) Timing Control System Malfunction

  1. Disconnect the T33 timing control valve connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    T33-1 - Body ground
    		9 to 14 V


OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (TIMING CONTROL VALVE - ECM)
NG


7.CHECK HARNESS AND CONNECTOR (ECM - INTEGRATION RELAY [MAIN RELAY])


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.5L-E Engine Control System.Ecd System. Dtc 14 (4) Timing Control System Malfunction

  1. Disconnect the T33 timing control valve connector.

  1. Disconnect the E20 ECM connector.

  1. Disconnect the 1J integration relay connector from the engine room junction block.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    T33-1 - 1J-5
    		Below 1 Ω
    E20-11 (TCV) - Body ground
    		10 kΩ or higher
    T33-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK ECM POWER SOURCE CIRCUIT