Dtc P1626 Idle Signal Output Value Too Low

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM)

REPLACE INJECTOR DRIVER

CHECK ANY OTHER DTCS OUTPUT

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P1626 Idle Signal Output Value Too Low

DTC P1627 Idle Signal Output Value Too High


DESCRIPTION

The ECM reduces injector operation speed and applied voltage to the injector to reduce the sound it produces during idling. To do this, the ECM outputs applied voltage switching signals to terminal IJEN of the injector driver from terminal IDLO of the ECM.

P1626
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Warm up the engine and idle it for 5 seconds
With the engine running at idle, voltage of the ECM IDLO terminal is 0.05 V or less for 5 seconds or more (1 trip detection logic).
  1. Open or short in idle control circuit
  2. Injector driver
  3. ECM

P1627
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Warm up the engine and idle it for 5 seconds
With the engine running at speeds higher than idle, voltage of the ECM IDLO terminal is 3.4 V or higher for 5 seconds or more (1 trip detection logic).
  1. Open or short in idle control circuit
  2. Injector driver
  3. ECM

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P1626 Idle Signal Output Value Too Low


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK05AX.html) and initialization (HILUX_TGN26 RM000000TIN058X.html).
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.CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM)

  1. Disconnect the injector driver 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
    C109-2 (IJEN) - C163-19 (IDLO)
    		Always
    		Below 1 Ω
    C109-2 (IJEN) or C163-19 (IDLO) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the injector driver connector.

  1. Reconnect the ECM connector.



NG
Go to step 5
OK


2.REPLACE INJECTOR DRIVER

  1. Replace the injector driver (HILUX_TGN26 RM000004QZ2007X.html).


NEXT


3.CHECK ANY OTHER DTCS OUTPUT

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON and turn the GTS on.

  1. After warming up the engine, idle the engine for 5 seconds or more.

  1. Enter the following menus: Powertrain / Engine / Trouble Codes.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    No DTC is output
    		A
    P1626 or P1627 is output
    		B


A
END
B


4.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).



NEXT
Go to step 6

5.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X4X.html).

  1. After warming up the engine, idle the engine for 5 seconds or more.

  1. Enter the following menus: Powertrain / Engine / Trouble Codes.

  1. Confirm that the DTC is not output again.


NEXT

END