STOP AND START SYSTEM STA Signal Circuit

DESCRIPTION

When the engine is being cranked, a starter activation request is also sent to the ECM STA terminal.

Tech Tips

When the ECM STA circuit is open, after the engine starts, stop and start control is not permitted to operate more than 4 times.


  • Stop and start prohibition only occurs for trips where a malfunction has been detected

  • MIL does not light

  • The engine can be started with the ignition or starter switch assembly (stop and start control is prohibited by the reliability of CAN transmission for voltage drops due to starter activation.)

B0046LTE02

WIRING DIAGRAM

B0047OGE06

PROCEDURE


  1. READ VALUE USING GTS (ENGINE 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 / Stop and Start / Data List / Engine Starter Signal.

    5. Check the Data Monitor when the ignition or starter switch assembly or the push start switch is operated.

      OK
      Ignition switch Engine Starter Signal
      ON OFF
      START ON

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST NO. 2 RELAY)


    1. Disconnect the A58 ECM connector.

    2. Remove the ST NO. 2 relay from No 2 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A58-29 (STA) - ST NO. 2 relay holder 2 Always Below 1 Ω

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR