Ecd System Starter Signal Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (STARTER SIG)

CHECK WIRE HARNESS (ECM - STARTER RELAY (Marking: ST))

ECD SYSTEM - Starter Signal Circuit


DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch to the ST fuse and also flows to terminal STA of the ECM (STA signal).

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Starter Signal Circuit


INSPECTION PROCEDURE

HINT:
This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to the problem symptoms table (Toyota Fortuner RM0000012WF044X.html).
NOTICE:
If the ECM is replaced, the new ECM needs initialization (Toyota Fortuner RM000000TIN04NX.html).
1.READ VALUE USING INTELLIGENT TESTER (STARTER SIG)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

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

  1. Read the values.

    OK:
    Ignition Switch Position
    		Starter SIG
    ON
    		OFF
    START
    		ON


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


2.CHECK WIRE HARNESS (ECM - STARTER RELAY (Marking: ST))


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Starter Signal Circuit

  1. Disconnect the E4 ECM connector.

  1. Remove the starter relay from the engine room relay block.

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

    Standard resistance :
    Tester Connection
    		Specified Condition
    Relay block starter relay terminal 1 - E4-7 (STA)
    		Below 1 Ω
    Relay block starter relay terminal 1 or E4-7 (STA) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM