DTC    14 (4)    Timing Control System Malfunction

для подготовки Нажмите здесь


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 internal fuel pressure of the pump 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 warming up the engine, the actual injection timing is different from the target value that the ECM calculated for several seconds.
  1. Open or short in timing control valve circuit
  2. Timing control valve
  3. Fuel filter element assembly (clogging)
  4. Fuel (frozen, air present)
  5. Injection pump assembly (internal pressure and timing control valve)
  6. ECM

WIRING DIAGRAM


A009AU7E02


INSPECTION PROCEDURE

1.INSPECT TIMING CONTROL VALVE

  1. Inspect the timing control valve (See page Нажмите здесь).



NG
REPLACE TIMING CONTROL VALVE (Нажмите здесь)
OK


2.CHECK ECM (TCV VOLTAGE)


    A00980UE12

  1. Disconnect the ECM 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
    C101-11 (TCV) - Body ground
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.



NG
Перейдите к шагу 6
OK


3.CHECK ECM (TCV VOLTAGE, SIGNAL)


    A00942YE06

  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
    C101-11 (TCV) - C101-14 (E1)
    		Ignition switch ON
    		11 to 14 V

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

    OK:
    Tester Connection
    		Condition
    		Specified Condition
    C101-11 (TCV) - C101-14 (E1)
    		Idling
    		Correct waveform is as shown

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)
    *b
    		TCV Signal Waveform



NG
REPLACE ECM (Нажмите здесь)
OK


4.CHECK LEVEL WARNING SWITCH

  1. Check the level warning switch (See page Нажмите здесь).



NG
REPLACE LEVEL WARNING SWITCH (Нажмите здесь)
OK


5.CHECK FOR FUEL LEAK

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

    OK:
    No leakage.



NG
REPAIR OR REPLACE PART WITH FUEL LEAKAGE
OK

REPLACE INJECTION PUMP ASSEMBLY (Нажмите здесь)  

6.CHECK TIMING CONTROL VALVE (POWER SOURCE)


    A0099G6E04

  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)

  1. Reconnect the timing control valve connector.



NG
Перейдите к шагу 7
OK

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

7.CHECK HARNESS AND CONNECTOR (TIMING CONTROL VALVE - NO. 1 INTEGRATION RELAY (EFI))

  1. Disconnect the timing control valve connector.

  1. Disconnect the No. 1 integration relay (EFI) connector from the engine room junction block.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C108-1 - 1B-4
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C108-1 or 1B-4 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the timing control valve connector.

  1. Reconnect the No. 1 integration relay (EFI) connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK ECM POWER SOURCE CIRCUIT (Нажмите здесь)