Sfi System Cranking Holding Function Circuit

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
3Zr-Fae Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

CHECK ECM (STSW TERMINAL VOLTAGE)

CHECK CLUTCH START SWITCH ASSEMBLY (INPUT VOLTAGE)

INSPECT CLUTCH START SWITCH ASSEMBLY

CHECK PARK/NEUTRAL POSITION SWITCH (INPUT VOLTAGE)

INSPECT PARK/NEUTRAL POSITION SWITCH

CHECK HARNESS AND CONNECTOR (ECM - MAIN BODY ECU)

INSPECT ST CUT RELAY

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - BODY GROUND)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - IGNITION RELAY NO. 2 (IG2))

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - ECM)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - MAIN BODY ECU)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - CLUTCH START SWITCH ASSEMBLY)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH)

CHECK ST RELAY (INPUT VOLTAGE)

INSPECT ST RELAY

CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)

CHECK ST RELAY (INPUT VOLTAGE)

CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER)

INSPECT STARTER

SFI SYSTEM - Cranking Holding Function Circuit


DESCRIPTION

The cranking holding control system continues providing power to the ST relay after the ECM detects the starter signal (STSW signal) from the main body ECU until the ECM determines that the engine started. Furthermore, the ECM outputs an accessory cut signal (ACCR signal) to the ACC relay during cranking to prevent flickering of the combination meter, clock, audio system, and other areas.
When the ECM detects the STSW signal, the ECM outputs the starter relay drive signal (STAR signal) to the starter relay through the park/neutral position switch (for CVT) or clutch start switch (for Manual Transaxle), and then the engine is cranked. When the ECM receives a stable engine speed signal (NE signal) (more specifically, when the NE signal reaches a predetermined value), the ECM stops outputting the STAR signal. Also, the ECM monitors the ST relay operating conditions based on the STA terminal voltage status.

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit


WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

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

  1. Check the result when the ignition switch is turned to ON, and when the engine is cranking.

    OK:
    Condition
    		Tester Display (Starter Signal)
    Ignition switch ON
    		OFF
    Engine cranking
    		ON
Result
Result
Proceed to
NG
A
OK
B


B
Go to step 15
A


2.CHECK ECM (STSW TERMINAL VOLTAGE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the ECM connector.

  1. Depress the clutch pedal fully (for Manual Transaxle).

  1. Move the shift lever to N (for CVT).

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A12-29 (STSW) - Body ground
    		Engine starts
    		11 to 14 V
    HINT:
    The engine does not crank because the terminal is not connected.
Result
Result
Proceed to
OK (for Manual Transaxle)
A
OK (for CVT)
B
NG
C

  1. Reconnect the ECM connector.



B
Go to step 5

C
Go to step 7
A


3.CHECK CLUTCH START SWITCH ASSEMBLY (INPUT VOLTAGE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the clutch start switch assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A4-2 - Body ground
    		Engine cranking
    		11 to 14 V
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Clutch Start Switch Assembly)
    HINT:
    The engine does not crank because the terminal is not connected.

  1. Reconnect the clutch start switch assembly connector.



NG
Go to step 8
OK


4.INSPECT CLUTCH START SWITCH ASSEMBLY


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the clutch start switch assembly.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 - 2
    		Pushed
    		Below 1 Ω
    1 - 2
    		Not pushed
    		10 kΩ or higher

  1. Reinstall the clutch start switch assembly.



NG
REPLACE CLUTCH START SWITCH ASSEMBLY (RAV4_ACA30 RM0000015T600AX.html)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ECM)

5.CHECK PARK/NEUTRAL POSITION SWITCH (INPUT VOLTAGE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the park/neutral position switch connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    B28-4 - Body ground
    		Engine cranking
    		11 to 14 V
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Park/Neutral Position Switch)
    HINT:
    The engine does not crank because the terminal is not connected.

  1. Reconnect the park/neutral position switch connector.



NG
Go to step 8
OK


6.INSPECT PARK/NEUTRAL POSITION SWITCH

  1. Inspect the park/neutral position switch (RAV4_ACA30 RM00000191B01KX.html).



NG
REPLACE PARK/NEUTRAL POSITION SWITCH (RAV4_ACA30 RM00000191D01KX.html)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

7.CHECK HARNESS AND CONNECTOR (ECM - MAIN BODY ECU)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the main body ECU connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E20-4 (STSW) - A12-29 (STSW)
    		Always
    		Below 1 Ω
    E20-4 (STSW) or A12-29 (STSW) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Main Body ECU)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the main body ECU connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - MAIN BODY ECU)
OK

CHECK ENTRY AND START SYSTEM (RAV4_ACA30 RM000000YEF050X.html)

8.INSPECT ST CUT RELAY


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST CUT relay from the No. 7 relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Battery voltage not applied to terminal 1 and 2
    		10 kΩ or higher
    3 - 5
    		Battery voltage applied to terminal 1 and 2
    		Below 1 Ω

  1. Reinstall the relay.



NG
REPLACE ST CUT RELAY
OK


9.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - BODY GROUND)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST CUT relay from the No. 7 relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ST CUT relay terminal 1 - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		No. 7 Relay Block
    *2
    		ST CUT

  1. Reinstall the ST CUT relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST CUT RELAY - BODY GROUND)
OK


10.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - IGNITION RELAY NO. 2 (IG2))


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST CUT relay from the No. 7 relay block.

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 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
    Ignition relay No. 2 (IG2) terminal 5 - ST CUT relay terminal 2
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 5 or ST CUT relay terminal 2 - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Engine Room No. 1 Relay Block
    *2
    		IG2
    *3
    		No. 7 Relay Block
    *4
    		ST CUT

  1. Reinstall the ST CUT relay.

  1. Reinstall the ignition relay No. 2 (IG2).



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST CUT RELAY - IGNITION RELAY NO. 2 (IG2))
OK


11.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the ECM connector.

  1. Remove the ST CUT relay from the No. 7 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 relay terminal 3 - B32-51 (STAR)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    ST CUT relay terminal 3 or B32-51 (STAR) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		No. 7 Relay Block
    *2
    		ST CUT
    *3
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reinstall the ST CUT relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST CUT RELAY - ECM)
OK


12.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - MAIN BODY ECU)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the main body ECU connector.

  1. Remove the ST CUT relay from the No. 7 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 relay terminal 3 - E20-14 (STR2)
    		Always
    		Below 1 Ω
    ST CUT relay terminal 5 - E20-3 (STR)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    ST CUT relay terminal 3 or E20-14 (STR2) - Body ground
    		Always
    		10 kΩ or higher
    ST CUT relay terminal 5 or E20-3 (STR) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Main Body ECU)
    *2
    		No. 7 Relay Block
    *3
    		ST CUT

  1. Reconnect the main body ECU connector.

  1. Reinstall the ST CUT relay.

Result
Result
Proceed to
OK (for Manual Transaxle)
A
OK (for CVT)
B
NG
C


B
Go to step 14

C
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST CUT RELAY - MAIN BODY ECU)
A


13.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - CLUTCH START SWITCH ASSEMBLY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the main body ECU connector.

  1. Disconnect the clutch start switch assembly connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    E20-3 (STR) - A4-2
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    E20-3 (STR) or A4-2 - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Main Body ECU)
    *2
    		Front view of wire harness connector
    (to Clutch Start Switch Assembly)

  1. Reconnect the main body ECU connector.

  1. Reconnect the clutch start switch assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - CLUTCH START SWITCH ASSEMBLY)
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

14.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the main body ECU connector.

  1. Disconnect the park/neutral position 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
    E20-3 (STR) - B28-4
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    E20-3 (STR) or B28-4 - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Main Body ECU)
    *2
    		Front view of wire harness connector
    (to Park/Neutral Position Switch)

  1. Reconnect the main body ECU connector.

  1. Reconnect the park/neutral position switch connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH)
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

15.CHECK ST RELAY (INPUT VOLTAGE)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST relay from the No. 7 relay block (for LHD).

  1. Remove the ST relay from the No. 8 relay block (for RHD).

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    ST relay terminal 1 - Body ground
    		Engine cranking
    		11 to 14 V
    HINT:
    The engine does not crank because the terminal is not connected.

  1. Reinstall the ST relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - ST RELAY)
OK


16.INSPECT ST RELAY

  1. Remove the ST relay from the No. 7 relay block (for LHD).



    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST relay from the No. 8 relay block (for RHD).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Battery voltage not applied to terminal 1 and 2
    		10 kΩ or higher
    3 - 5
    		Battery voltage applied to terminal 1 and 2
    		Below 1 Ω

  1. Reinstall the ST relay.



NG
REPLACE ST RELAY
OK


17.CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST relay from the No. 7 relay block (for LHD).

  1. Remove the ST relay from the No. 8 relay block (for RHD).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ST relay terminal 2 - Body ground
    		Always
    		Below 1 Ω

  1. Reinstall the ST relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BODY GROUND)
OK


18.CHECK ST RELAY (INPUT VOLTAGE)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST relay from the No. 7 relay block (for LHD).

  1. Remove the ST relay from the No. 8 relay block (for RHD).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    ST relay terminal 5 - Body ground
    		Ignition switch ON
    		11 to 14 V

  1. Reinstall the ST relay.



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


19.CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST relay from the No. 7 relay block (for LHD).

  1. Remove the ST relay from the No. 8 relay block (for RHD).

  1. Disconnect the starter 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 terminal 3 - B26-1
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    ST relay terminal 3 or B26-1 - Body ground
    		Always
    		10 kΩ or higher

  1. Reinstall the ST relay.

  1. Reconnect the starter connector.



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


20.INSPECT STARTER

  1. Inspect the starter (RAV4_ACA30 RM000001ETI01FX.html).



NG
REPLACE STARTER ASSEMBLY (RAV4_ACA30 RM000000YQ4010X.html)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER)