СИСТЕМА SFI > Цепь функции полуавтоматического запуска двигателя

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DESCRIPTION

The cranking holding control system provides current to the starter when the ECM detects the engine switch's start signal (STSW). When the ECM performs a firing judgment, the system cuts current to the starter. When the 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's STAR terminal. Then the STAR output signal travels through the park/neutral position (PNP) switch to the STARTER relay, causing the starter to activate.
When the engine is cranking, the starter operation signal is sent to the ECM's STA terminal.

A103821E05


WIRING DIAGRAM

Refer to DTC P0617 (see page Нажмите здесь).

INSPECTION PROCEDURE

1.CHECK OPERATION OF CRANKING

  1. When starting the engine, check whether the starter motor starts.

    Result:
    Starter Condition
    		Proceed to
    Not operating
    		A
    Operating
    		B



B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Нажмите здесь)
A


2.CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (ENGINE DOES NOT START)

  1. Refer to Smart Access System With Push-button Start [Engine does not start] (see page Нажмите здесь).



NG
REPAIR SMART ACCESS SYSTEM WITH PUSH-BUTTON START
OK


3.READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the tester ON.

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

  1. Check the result when the engine switch is turned on (IG) and the engine is started.

    Standard:
    Starter Signal
    		Engine Switch Position
    OFF
    		on (IG)
    ON
    		ENGINE START



OK
Перейдите к шагу 9
NG


4.INSPECT ECM (STAR AND STSW VOLTAGE)


    A124678E31

  1. Measure the voltage according to the value(s) in the table below while cranking the engine.

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A14-2 (STAR) - E3-1 (E1)
    		Engine cranking
    		11 to 14 V
    A14-27 (STSW) - E3-1 (E1)
    		Engine cranking
    		11 to 14 V

    Result:
    Terminal STAR
    		Terminal STSW
    		Proceed to
    11 to 14 V
    		11 to 14 V
    		A
    0 V
    		11 to 14 V
    		B
    0 V
    		0 V
    		C



B
REPLACE ECM (Нажмите здесь)

C
GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (Нажмите здесь)
A


5.INSPECT ST CUT RELAY


    B016200E02

  1. Remove the ST CUT relay from the engine room No. 2 relay block.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		When no battery voltage applied to terminals 1 and 2
    		10 kΩ or higher
    3 - 5
    		When battery voltage applied to terminals 1 and 2
    		Below 1 Ω



NG
REPLACE ST CUT RELAY
OK


6.INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    C146745E04

  1. Disconnect the park/neutral position (PNP) switch connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    4 - 5
    		Shift position P
    		Below 1 Ω
    4 - 5
    		Shift position N
    		Below 1 Ω



NG
REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (Нажмите здесь)
OK


7.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PARK/NEUTRAL POSITION SWITCH, ECM)
A157831E01

  1. Remove the ST CUT relay from the engine room No. 2 relay block.

  1. Disconnect the E45 switch connector.

  1. Disconnect the A14 ECM connector.

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

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified condition
    ST CUT (3) - Park / neutral position switch (4)
    		Always
    		Below 1 Ω
    ST CUT (5) - A14-2 (STAR)
    		Always
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified condition
    ST CUT (3) or Park / neutral position switch (4) - Body ground
    		Always
    		10 kΩ or higher
    ST CUT (5) or A14-2 (STAR) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST CUT RELAY - PARK/NEUTRAL POSITION SWITCH, ECM)
OK


8.CHECK ENGINE ROOM NO. 2 RELAY BLOCK (ST CUT RELAY - IG2 RELAY, BODY GROUND)
A157832E01

  1. Remove the IG2 relay from the engine room No. 2 relay block.

  1. Remove the ST CUT relay from the engine room No. 2 relay block.

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

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified condition
    ST CUT (2) - IG2 (3)
    		Always
    		Below 1 Ω
    ST CUT (1) - Body ground
    		Always
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified condition
    ST CUT (2) or IG2 (3) - Body ground
    		Always
    		10 kΩ or higher



NG
REPLACE ENGINE ROOM NO. 2 RELAY BLOCK (ST CUT RELAY - IG2 RELAY, BODY GROUND)
OK

REPLACE HARNESS OR CONNECTOR (IG2 RELAY - BATTERY) 

9.INSPECT STARTER RELAY


    B016200E02

  1. Remove the starter relay from the engine room No. 2 relay block.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		When no battery voltage applied to terminals 1 and 2
    		10 kΩ or higher
    3 - 5
    		When battery voltage applied to terminals 1 and 2
    		Below 1 Ω



NG
REPLACE STARTER RELAY
OK


10.CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH, BODY GROUND)


    A157833E01

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

  1. Disconnect the E49 switch connector.

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

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (1) - Park / neutral position switch (5)
    		Always
    		Below 1 Ω
    ST relay (2) - Body ground
    		Always
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (1) or Park / neutral position switch (5) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH, BODY GROUND)
OK


11.INSPECT STARTER ASSEMBLY

  1. Inspect the starter assembly for 1.6 kW type (see page Нажмите здесь) or starter assembly for 2.0 kW type (see page Нажмите здесь).



NG-1
REPAIR OR REPLACE STARTER ASSEMBLY (for 1.6 kW Type) (Нажмите здесь)

NG-2
REPAIR OR REPLACE STARTER ASSEMBLY (for 2.0 kW Type) (Нажмите здесь)
OK


12.CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - ST RELAY, BATTERY)
A157834E01

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

  1. Disconnect the E25 and F1 starter connectors.

  1. Disconnect the cable from the positive battery terminal.

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

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (3) - E25-1
    		Always
    		Below 1 Ω
    F1-1 - Battery cable (+)
    		Always
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (3) or E25-1 - Body ground
    		Always
    		10 kΩ or higher
    F1-1 or Battery cable (+) - Body ground
    		Always
    		10 kΩ or higher



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

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