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ECD SYSTEM(w/o DPF) Cranking Holding Function Circuit

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DTC Code DTC Name
  Cranking Holding Function Circuit
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DESCRIPTION

The cranking holding control system provides current to the starter when the ECM detects the ignition switch start signal (STSW). When the ECM performs a firing judgment, the system cuts current to the starter. When an ECM receives the STSW signal, it turns on the ST CUT relay, which prevents flickering of the combination meter, clock, audio system, etc. Also, the ECM sends a signal to the ECM STAR terminal of the ECMl. Then the STAR output signal travels through the park/neutral position (PNP) switch to the ST relay, causing the starter to activate.

When the engine is cranking, the starter operation signal is sent to the ECM STA terminal of the ECM.

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WIRING DIAGRAM

Refer to DTC P0617 (Click here).

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PROCEDURE


  1. Click here

    CHECK CRANKING


    1. Check the cranking of the engine.

      Result
      Test Result Proceed to
      Cranking possible and holding control operates A
      Does not crank B
      Cranking possible but holding control does not operate C

  2. Click here

    READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Read the values.

    6. Check the result when the ignition switch is turned to ON and when the engine is started.

      OK
      Ignition Switch Condition Display (Starter Signal)
      ON OFF
      Engine started ON

  3. Click here

    INSPECT STARTER RELAY (ST)


    1. Inspect the starter relay (ST) (Click here).


  4. Table 1. *1 Front view of wire harness connector: (to Engine Room Relay Block) *2 Front view of wire harness connector: (to PNP Switch)
    Click here

    CHECK HARNESS AND CONNECTOR (PNP SWITCH - ST RELAY)


    1. Disconnect the Park/Neutral Position (PNP) switch.

    2. Remove the ST relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST relay (2) - C24-5 Always Below 1 Ω
      ST relay (2) or D24-5 - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Table 2. *1 Front view of wire harness connector: (to Engine Room Relay Block)
    Click here

    CHECK HARNESS AND CONNECTOR (POWER SOURCE)


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

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      ST relay (1) - ST relay (5) Always 11 to 14 V

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY (ST) - BATTERY, BODY GROUND)

  6. Click here

    INSPECT STARTER


    1. Inspect the starter (Click here).

      Result
      Test Result Proceed to
      OK A
      NG B

    • A

      REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER - STARTER RELAY (ST), BATTERY)

    • B

      REPLACE STARTER (Click here)

  7. Click here

    INSPECT STARTER CUT RELAY (ST CUT)


    1. Inspect the starter cut relay (ST CUT) (Click here).


    • OKClick here
    • NG

      REPLACE STARTER CUT RELAY (ST CUT)

  8. Click here

    CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)


    1. Remove the starter cut relay (ST CUT) from the engine room relay block.

    2. Disconnect the PNP switch connector.

    3. Disconnect the ECM connector.

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

      Standard Resistance
      Table 3. for LHD
      Tester Connection Condition Specified Condition
      ST CUT relay (5) - C45-51 (STAR) Always Below 1 Ω
      ST CUT relay (3) - C24-4 (B) Always Below 1 Ω
      ST CUT relay (5) or C45-51 (STAR) - Body ground Always 10 kΩ or higher
      ST CUT relay (3) or C24-4 (B) - Body ground Always 10 kΩ or higher
      Table 4. for RHD
      Tester Connection Condition Specified Condition
      ST CUT relay (5) - C46-51 (STAR) Always Below 1 Ω
      ST CUT relay (3) - C24-4 (B) Always Below 1 Ω
      ST CUT relay (5) or C46-51 (STAR) - Body ground Always 10 kΩ or higher
      ST CUT relay (3) or C24-4 (B) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    INSPECT PARK/NEUTRAL POSITION SWITCH


    1. A01X5VFE06
      Table 5.
      *1 Component without harness connected: (Park/Neutral Position Switch)

      Inspect the Park/Neutral Position (PNP) switch.


      1. Disconnect the PNP switch connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        4 (B) - 5 (L) Shift lever in P Below 1 Ω
        Shift lever in N Below 1 Ω

  10. Click here

    CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM)


    1. Disconnect the PNP switch connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Table 6. for LHD
      Tester Connection Condition Specified Condition
      C24-5 (L) - A38-48 (STA) Always Below 1 Ω
      C24-5 (L) or A38-48 (STA) - Body ground Always 10 kΩ or higher
      Table 7. for RHD
      Tester Connection Condition Specified Condition
      C24-5 (L) - A52-48 (STA) Always Below 1 Ω
      C24-5 (L) or A52-48 (STA) - Body ground Always 10 kΩ or higher
      Table 8. Result
      Result Proceed to
      NG A
      OK B

    • A

      REPAIR OR REPLACE HARNESS OR CONNECTOR

    • BClick here
  11. Click here

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)


    1. Disconnect the main body ECU connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Table 9. for LHD
      Tester Connection Condition Specified Condition
      E4-4 (STSW) - A38-14 (STSW) Always Below 1 Ω
      E4-4 (STSW) or A38-14 (STSW) - Body ground Always 10 kΩ or higher
      Table 10. for RHD
      Tester Connection Condition Specified Condition
      E4-4 (STSW) - A52-14 (STSW) Always Below 1 Ω
      E4-4 (STSW) or A52-14 (STSW) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)


    1. Remove the starter cut relay (ST CUT) from the engine room relay block.

    2. Disconnect the PNP switch connector.

    3. Disconnect the ECM connector.

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

      Standard Resistance
      Table 11. for LHD
      Tester Connection Condition Specified Condition
      ST CUT relay (5) - C45-51 (STAR) Always Below 1 Ω
      ST CUT relay (3) - C24-4 (B) Always Below 1 Ω
      ST CUT relay (5) or C45-51 (STAR) - Body ground Always 10 kΩ or higher
      ST CUT relay (3) or C24-4 (B) - Body ground Always 10 kΩ or higher
      Table 12. for RHD
      Tester Connection Condition Specified Condition
      ST CUT relay (5) - C46-51 (STAR) Always Below 1 Ω
      ST CUT relay (3) - C24-4 (B) Always Below 1 Ω
      ST CUT relay (5) or C46-51 (STAR) - Body ground Always 10 kΩ or higher
      ST CUT relay (3) or C24-4 (B) - Body ground Always 10 kΩ or higher

    • OK

      REPLACE ECM (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. Click here

    REPLACE ECM


    1. Replace the ECM (Click here).


  14. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Check the starter operation.

      OK
      Malfunction has been repaired successfully.

    • OK

      END

    • NG

      GO TO ENTRY AND START SYSTEM (ENGINE DOES NOT START) (Click here)