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Home >> Toyota >> 2005 >> Sequoia Limited, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine - Diagnostics >> Circuit Inspection >> Cranking Hold Function Circuit >> Inspection Procedure >> Hand-held tester:

Hand-held tester:

  1. Check operation of engine cranking. 

    CHECK: 

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

    OK: 

    Starter motor starts. 

    1. OK:  CHECK FOR INTERMITTENT PROBLEMS  
    2. NG: Go to next step 
  2. Connect hand-held tester, and check STA signal. 

    PREPARATION: 

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON, and push the hand-held tester main switch ON.
    3. Enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.

    CHECK: 

    Read the STA signal on the hand-held tester while the starter operates.

    OK: 

    IGNITION SWITCH POSITION DESCRIPTION

    Ignition Switch Position ON START
    STARTER SIG OFF ON
    1. NG: Go to step   5 . 
    2. OK: Go to next step 
  3. Check voltage between terminal STAR, STSW and E1 of ECM connector. 

    CHECK: 

    Measure the voltage between the terminals of the E6 ECM connectors, while cranking the engine (ignition switch START position).

    OK: 

    Fig 1: Identifying E6 ECM Connectors Terminals
    G03058496Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Specified Condition
    STA (E6-11) - E1 (E6-1) 9 to 14 V
    STSW (E6-12) - E1 (E6-1) 9 to 14 V

    RESULT: 

    RESULT DESCRIPTION

    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
    1. B: Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
    2. C: Go to step   9 . 
    3. A: Go to next step 
  4. Check park/neutral position switch. 

    PREPARATION: 

    Remove the P1 park/neutral position switch connector.

    CHECK: 

    Check resistance between each terminal shown below when the shift lever is moved to each range.

    RESISTANCE DESCRIPTION

    Shift range Terminal No. to continuity
    P 1 - 3 6 - 9
    R 2 - 3 -
    N 3 - 5 6 - 9
    D 3 - 7 -
    2 3 - 4 -
    L 3 - 8 -
    Fig 2: Identifying Park/Neutral Position Switch Connector Terminals
    G03058497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    Below 1 Ω 

    1. NG: Replace the park/neutral position switch. 
    2. OK: Check and repair harness and connector between park/neutral position switch and ECM. 
  5. Check starter relay. 
    1. Remove the starter relay from the engine room R/B.
    2. Inspect the starter relay.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Specified Condition
    3 - 5 10 kΩ or higher
    3 - 5 Below 1 Ω (Apply battery voltage to terminals 1 and 2)
    Fig 3: Inspecting Starter Relay
    G03058498Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace starter relay. 
    2. OK: Go to next step 
  6. Check for open and short in harness and connector between park/neutral position switch and starter relay. 
    1. Check the harness and the connector between the park/neutral position switch connector and the starter relay.
      1. Disconnect the park/neutral position switch connector.
      2. Remove the starter relay from the engine room R/B.
      3. Check for resistance between the wire harness side connectors.
        Fig 4: Identifying Park/Neutral Position Switch Connector Terminals
        G03058499Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      SYMBOLS AND SPECIFIED CONDITION

      Symbols (Terminal No.) Specified condition
      Park/Neutral position switch (N1-6) - Starter relay (1) Below 1 Ω

      Standard (Check for short): 

      SYMBOLS AND SPECIFIED CONDITION

      Symbols (Terminal No.) Specified condition
      Park/Neutral position switch (N1-6) or Starter relay (1) - Body ground 10 kΩ or higher
    2. Check the harness and the connector between the starter relay and the body ground.
      1. Remove the starter relay from the engine room R/B.
      2. Check for resistance between the starter relay and the body ground.

    Standard (Check for open): 

    SYMBOLS AND SPECIFIED CONDITION

    Symbols (Terminal No.) Specified condition
    Starter relay (2) - Body ground Below 1 Ω
    Fig 5: Identifying Starter Relay Location
    G03058500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Repair or replace harness or connector. 
    2. OK: Go to next step 
  7. Check engine room R/B No.2 (Starter relay voltage). 

    PREPARATION: 

    Remove the starter relay from the engine room R/B No.2.

    CHECK: 

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

    OK: 

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Specified Condition
    Starter relay (5) - Body ground 9 to 14 V
    Fig 6: Identifying Starter Relay Location
    G03058501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Check and repair harness and connector between starter relay and battery. 
    2. OK: Go to next step 
  8. Check starter (See  TEST  ). 
    1. NG: Repair or replace starter. 
    2. OK: Go to next step 
  9. Check ignition switch. 

    PREPARATION: 

    1. Remove the lower finish panel.
    2. Disconnect the ignition switch connector.

    CHECK: 

    Check resistance between terminals.

    OK: 

    Standard: 

    SWITCH POSITION AND SPECIFIED CONDITION

    Switch Position Terminal Condition Specified Condition
    LOCK Always 10 kΩ or more
    ACC 1 - 3 Below 1 Ω
    ON 1 - 2 - 3 Below 1 Ω
    ON 5 - 6 Below 1 Ω
    START 1 - 2 Below 1 Ω
    START 4 - 5 - 6 Below 1 Ω
    Fig 7: Identifying Ignition Switch Connector Terminals
    G03058502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace ignition switch. 
    2. OK: Check for open in harness and connector between ECM and ignition switch, ignition switch and battery (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
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