Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

1Gr-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Wiring diagram

  3. Inspection procedure

  4. Check operation of engine cranking

  5. Read value of intelligent tester (sta signal)

  6. Inspect ecm (star and stsw voltage)

  7. Inspect park/neutral position switch assembly

  8. Inspect starter relay

  9. Check harness and connector (park/neutral position switch - body ground)

  10. Inspect engine room relay block (starter relay voltage)

  11. Inspect starter assembly

  12. Check fuse (sta no. 2)

  13. Inspect ignition or starter switch assembly

SFI SYSTEM > Cranking Holding Function Circuit


​

DESCRIPTION

The starter is controlled by the ECM, when the ECM detects a start signal (STSW) from the ignition switch, this system monitors the engine speed (NE) and continues to operate the starter until it has determined that the engine has started (engine speed reaches approximately 500 rpm). If the engine is already running and the ignition switch is turned to START, the ECM will not operate the starter.

When turning the ignition switch to the ST position, check whether the starter motor starts. 4Runner


WIRING DIAGRAM

Refer to DTC P0617 (Click here).

INSPECTION PROCEDURE

1.CHECK OPERATION OF ENGINE CRANKING

  1. When turning the ignition switch to the ST position, check whether the starter motor starts.



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CHECK FOR INTERMITTENT PROBLEMS
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2.READ VALUE OF INTELLIGENT TESTER (STA SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.

  1. Read the values.

    Standard:

    STARTER SIG
    		Ignition Switch Position
    OFF
    		ON
    ON
    		START


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3.INSPECT ECM (STAR AND STSW VOLTAGE)
  1. Measure the voltage between the terminals of the E5 and E6 ECM connectors, while cranking the engine.Standard voltage:Tester ConnectionSpecified ConditionSTAR/NSW (E5-8) - E1 (E6-1)9 to 14 VSTSW (E5-12) - E1 (E6-1)9 to 14 VResult:Terminal STARTerminal STSWProceed to9 to 14 V9 to 14 VA0 V9 to 14 VB0 V0 VC 4Runner

  2. Measure the voltage between the terminals of the E5 and E6 ECM connectors, while cranking the engine.

    Standard voltage:
    Tester Connection
    		Specified Condition
    STAR/NSW (E5-8) - E1 (E6-1)
    		9 to 14 V
    STSW (E5-12) - E1 (E6-1)
    		9 to 14 V
    Result:
    Terminal STAR
    		Terminal STSW
    		Proceed to
    9 to 14 V
    		9 to 14 V
    		A
    0 V
    		9 to 14 V
    		B
    0 V
    		0 V
    		C


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REPLACE ECM

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Go to step 9
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4.INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY
  1. Disconnect the P1 park/neutral position switch connector. 4Runner

  2. Disconnect the P1 park/neutral position switch connector.

  1. Check for continuity between each terminal shown below when the shift lever is moved to each position.

    Standard:
    Shift Position
    		Tester Connection
    		Specified Condition
    P
    		1 - 3
    6 - 9
    		Continuity
    R
    		2 - 3
    N
    		3 - 5
    6 - 9
    D
    		3 - 7
    3
    		3 - 4
    2, L
    		3 - 8


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REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY
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CHECK AND REPLACE HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

5.INSPECT STARTER RELAY
  1. Remove the starter relay from the engine room R/B. 4Runner

  2. Remove the starter relay from the engine room R/B.

  1. Inspect the starter relay.

    Standard:
    Tester Connection
    		Specified Condition
    1 - 2
    		Continuity
    3 - 5
    		No continuity
    Continuity
    (Apply battery voltage to terminals 1 and 2)

  1. Reinstall the starter relay.



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REPLACE STARTER RELAY
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6.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BODY GROUND)
  1. Check the harness and connector between the park/neutral position switch and starter relay.Disconnect the P1 park/neutral position switch connector.Remove the starter relay from the engine room R/B.Measure the resistance between the wire harness side connectors.Standard resistance (Check for open):Tester ConnectionsSpecified ConditionsPark/neutral position switch (P1-6) - Starter relay (1)Below 1 ΩStandard resistance (Check for short):Tester ConnectionsSpecified ConditionsPark/neutral position switch (P1-6) or Starter relay (1) - Body ground10 kΩ or higherReconnect the park/neutral position switch connector.Reinstall the starter relay. 4Runner

  2. Check the harness and connector between the park/neutral position switch and starter relay.

    1. Disconnect the P1 park/neutral position switch connector.

    2. Remove the starter relay from the engine room R/B.

    3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open):
      Tester Connections
      		Specified Conditions
      Park/neutral position switch (P1-6) - Starter relay (1)
      		Below 1 Ω
      Standard resistance (Check for short):
      Tester Connections
      		Specified Conditions
      Park/neutral position switch (P1-6) or Starter relay (1) - Body ground
      		10 kΩ or higher

    4. Reconnect the park/neutral position switch connector.

    5. Reinstall the starter relay.

  1. Check the harness and connector between the starter relay, and body ground.

    1. Measure the resistance between each relay and body ground.

      Standard resistance (Check for open):
      Tester Connections
      		Specified Conditions
      Starter relay (2) - Body ground
      		Below 1 Ω

    2. Reinstall the starter relay.



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REPAIR OR REPLACE HARNESS OR CONNECTOR
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7.INSPECT ENGINE ROOM RELAY BLOCK (STARTER RELAY VOLTAGE)
  1. Remove the starter relay from the engine room R/B. 4Runner

  2. Remove the starter relay from the engine room R/B.

  1. Measure the voltage between the terminal of the engine room R/B and body ground.

    Standard voltage:
    Tester Connections
    		Specified Conditions
    Starter relay (5) - Body ground
    		9 to 14 V

  1. Reinstall the starter relay.



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CHECK AND REPLACE HARNESS AND CONNECTOR (STARTER RELAY - BATTERY)
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8.INSPECT STARTER ASSEMBLY

  1. Inspect the starter assembly (Click here for Standard, Click here for Cold area).



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REPAIR OR REPLACE STARTER ASSEMBLY
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CHECK AND REPLACE HARNESS AND CONNECTOR (STARTER RELAY - STARTER, STARTER - BATTERY)

9.CHECK FUSE (STA NO. 2)
  1. Remove the STA No. 2 fuse from the driver side J/B. 4Runner

  2. Remove the STA No. 2 fuse from the driver side J/B.

  1. Check for continuity in the STA No. 2 fuse.

    Standard:
    Continuity

  1. Reinstall the STA No. 2 fuse.



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CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED NO. 2 STA FUSE AND REPLACE NO. 2 STA FUSE
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10.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
  1. Disconnect the I18 ignition switch connector. 4Runner

  2. Disconnect the I18 ignition switch connector.

  1. Check for continuity between the terminals shown in the chart below.

    Standard:
    Switch Position
    		Tester Connection
    		Specified Condition
    LOCK
    		All terminal to terminal
    		No continuity
    ACC
    		2 - 3
    		Continuity
    ON
    		2 - 3, 2 - 4, 3 - 4, 6 - 7
    		Continuity
    START
    		1 - 2, 1 - 4, 2 - 4, 6 - 7, 6 - 8, 7 - 8
    		Continuity

  1. Reconnect the ignition switch connector.



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REPLACE IGNITION OR STARTER SWITCH ASSEMBLY
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CHECK AND REPLACE HARNESS AND CONNECTOR (ECM-BATTERT)