Dtc P1626 Idle Signal Output Value Too Low

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Vd-Ftv Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

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

DTC P1629 Idol Signal Output Value Too Low Bank2

DTC P162A Idol Signal Output Value Too High Bank2


DESCRIPTION

The ECM reduces injector assembly operation speed and applied voltage to the injector assembly 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 and IDL2 of the ECM.

P1626 (No. 1), P1629 (No. 2)
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 or IDL2 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 (No. 1), P162A (No. 2)
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 or IDL2 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


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf). Dtc P1626 Idle Signal Output Value Too Low


INSPECTION PROCEDURE

NOTICE:
  1. After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
  2. After replacing the fuel supply pump assembly, the ECM needs initialization (Click here).
  3. After replacing an injector assembly, the ECM needs registration (Click here).
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 No. 1 or No. 2 injector driver connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    C152-7 (IJEN) - C45-59 (IDLO)
    		Always
    		Below 1 Ω
    C156-7 (IDL2) - C45-58 (IDL2)
    		Always
    		Below 1 Ω
    C152-7 (IJEN) or C45-59 (IDLO) - Body ground
    		Always
    		10 kΩ or higher
    C156-7 (IDL2) or C45-58 (IDL2) - Body ground
    		Always
    		10 kΩ or higher

    Standard Resistance:

    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    C152-7 (IJEN) - C46-59 (IDLO)
    		Always
    		Below 1 Ω
    C156-7 (IDL2) - C46-58 (IDL2)
    		Always
    		Below 1 Ω
    C152-7 (IJEN) or C46-59 (IDLO) - Body ground
    		Always
    		10 kΩ or higher
    C156-7 (IDL2) or C46-58 (IDL2) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the No. 1 or No. 2 injector driver connector.

  1. Reconnect the ECM connector.



NG
Go to step 5
OK


2.REPLACE INJECTOR DRIVER
  1. When DTC P1626 or P1627 is output:
    Replace the No. 1 injector driver (Click here).
  1. When DTC P1629 or P162A is output:
    Replace the No. 2 injector driver (Click here).

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. Enter the following menus: Engine and ECT / Trouble Codes.

  1. Read the DTCs.

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


B
Go to step 4
A

END

4.REPLACE ECM

  1. Replace the ECM (Click here).



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 (Click here).

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

  1. Enter the following menus: Engine and ECT / Trouble Codes.

  1. Confirm that the DTC is not output again.


NEXT

END