ECD SYSTEM > Starter Signal Circuit

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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


A111106E01


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 (Click here).

NOTICE:
If the ECM is replaced, the new ECM needs initialization (Click here).

1.READ VALUE OF STARTER SIGNAL

  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 / Data List / Starter Signal.

  1. Read the values.

    Standard:
    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 - ST RELAY)


    A109139E03

  1. Disconnect the E5 ECM connector.

  1. A/T:
    Remove the ST relay from the engine room J/B.

  1. M/T:
    Disconnect the 2O J/B connector.

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

    Standard resistance (A/T):
    Tester Connection
    		Specified Condition
    R/B ST relay terminal 2 - E5-7 (STA)
    		Below 1 Ω
    R/B ST relay terminal 2 or E5-7 (STA) - Body ground
    		10 kΩ or higher

    Standard resistance (M/T):
    Tester Connection
    		Specified Condition
    2O-19 - E5-7 (STA)
    		Below 1 Ω
    2O-19 - E5-7 (STA) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM