Ecd System Starter Signal Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

ECD SYSTEM - Starter Signal Circuit


DESCRIPTION

When the engine is cranked, the intake air flow becomes slow so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection volume for starting and after-start injection control.

WIRING DIAGRAM


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


INSPECTION PROCEDURE


When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

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

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.

  1. Read the STA signal on the intelligent tester while the starter operates.

    OK:
    Ignition Switch Position
    		Starter SIG
    LOCK, ACC, ON
    		OFF
    START
    		ON


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM000000VQC00UX.html)

2.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

  1. Disconnect the clutch start switch 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
    A41-1 - G182-6 (STA)
    		Always
    		Below 1 Ω
    A41-1 or G182-6 (STA) - Body ground
    		Always
    		10 kΩ higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    r2-1 - G182-6 (STA)
    		Always
    		Below 1 Ω
    r2-1 or G182-6 (STA) - Body ground
    		Always
    		10 kΩ higher

  1. Reconnect the clutch start switch connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM000000VW203FX.html)