СИСТЕМА ECD Starter Signal Circuit

DESCRIPTION

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

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE USING GTS (STARTER SIGNAL)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

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

   5. Read the value.

      Result
      Ignition Switch Condition Starter Signal ON OFF START ON

   
   
   • OKClick here
   • NGClick here
2. Click here

   INSPECT IGNITION SWITCH

   
   

   1. Inspect the ignition switch (Click here).

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ECM)

   
   

   1. Disconnect the ignition switch connector.

   2. Disconnect the ECM connector.

   3. Remove the ST relay from the instrument panel relay block.

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

      Standard resistance
      Tester Connection Condition Specified Condition H25-1 (ST1) - B74-33 (STA) Always Below 1 Ω H25-1 (ST1) or B74-33 (STA) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
4. Click here

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

5. Click here

   REPLACE ECMClick here

6. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

7. Click here

   REPLACE IGNITION SWITCH