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Inspection Procedure

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: 

    1. Starter motor starts. 
    1. OK: Check for intermittent problems (See  PRE-CHECK  ). 
    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 menus: DIAGNOSTICS / 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 and STA Signal Table

    Ignition Switch Position ON START
    STA Signal 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 and E7 ECM connectors, while cranking the engine (ignition switch START position).

    OK: 

    Tester Connection Specified Condition Table

    Tester Connection Specified Condition
    STAR (E6-9) - E1 (E7-1) 9 to 14 V
    STSW (E7-12) - E1 (E7-1) 9 to 14 V

    RESULT: 

    Terminals Voltage Check Table

    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
    Fig 1: Locating STAR and STSW Terminals
    G02910434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. B: Replace ECM (See  INSPECTION  ). 
    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 continuity between each terminal shown below when the shift lever is moved to each range.

    Shift Range Terminal Continuity Check Table

    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 P1 Park/Neutral Position Switch Connector terminal
    G02910435Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    1. There is continuity. 
    1. NG: Replace the park/neutral position switch. 
    2. OK: Check and repair harness and connector between park/neutral position switch and ECM (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
  5. Check starter relay (See  STARTERS  ). 
    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, starter relay and body ground (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
    1. NG: Repair or replace harness or connector. 
    2. OK: Go to Next Step 
  7. Check engine room R/B (Starter relay voltage). 

    PREPARATION: 

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

    CHECK: 

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

    OK: 

    Tester Connection Specified Condition Table

    Tester Connection Specified Condition
    Starter relay (5) - Body ground 9 to 14 V
    Fig 3: Locating Starter Relay terminal
    G02910436Courtesy 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  STARTERS  ). 
    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 continuity between terminals shown below.

    OK: 

    Switch Position Terminal Continuity Check Table

    Switch Position Terminal No. to continuity
    LOCK - -
    ACC 2-3 -
    ON 2-3-4 6-7
    START 1-2-4 6-7-8
    Fig 4: Identifying Ignition Switch Connector terminal
    G02910437Courtesy 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 TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 

OBD II scan tool (excluding hand-held tester): 

  1. Check operation of engine cranking. 

    CHECK: 

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

    1. OK: Check for intermittent problems (See  PRE-CHECK  ). 
    2. NG: Go to Next Step 
  2. Check voltage between terminal STSW, STAR, STA and E1 of ECM connector. 

    CHECK: 

    Measure the voltage between the terminals of E5, E6 and E7 ECM connectors, while cranking the engine (ignition switch START position).

    OK: 

    Specified Condition Table

    Tester Connection Specified Condition
    STA (E5-17) - E1 (E7-1) 9 to 14 V
    STAR (E6-9) - E1 (E7-1) 9 to 14 V
    STSW (E7-12) - E1 (E7-1) 9 to 14 V
    Fig 5: Identifying E5, E6 and E7 ECM Connectors terminals
    G02910438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    RESULT: 

    Terminal Voltage Check Table

    Terminal STA Terminal STAR Terminal STSW Proceed to
    9 to 14 V 9 to 14 V 9 to 14 V A
    0 V 9 to 14 V 9 to 14 V B
    0 V 0 V 9 to 14 V C
    0 V 0 V 0 V D
    1. B: Go to step   7 . 
    2. C: Replace ECM (See  INSPECTION  ). 
    3. D: Go to step   8 . 
    4. A: Go to Next Step 
  3. Check starter relay (See  STARTERS  ). 
    1. NG: Replace starter relay. 
    2. OK: Go to Next Step 
  4. Check for open and short in harness and connector between park/neutral position switch and starter relay, starter relay and body ground (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
    1. NG: Repair or replace harness or connector. 
    2. OK: Go to Next Step 
  5. Check engine room R/B (Starter relay voltage). 

    PREPARATION: 

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

    CHECK: 

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

    OK: 

    Specified Condition Table

    Tester Connection Specified Condition
    Starter relay (5) - Body ground 9 to 14 V
    Fig 6: Locating Starter Relay Terminal
    G02910439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Check and repair harness and connector between starter relay and battery (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
    2. OK: Go to Next Step 
  6. Check starter (See  STARTERS  ). 
    1. NG: Repair or replace starter. 
    2. OK: Check and repair harness and connector between starter relay and starter, starter and battery (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
  7. Check park/neutral position switch. 

    PREPARATION: 

    Remove the P1 park/neutral position switch connector.

    CHECK: 

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

    Shift Range Terminal Continuity Check Table

    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 7: Identifying P1 Park/Neutral Position Switch Connector Terminal
    G02910440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    1. There is continuity. 
    1. NG: Replace the park/neutral position switch. 
    2. OK: Check and repair harness and connector between park/neutral position switch and ECM (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
  8. Check ignition switch. 

    PREPARATION: 

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

    CHECK: 

    Check continuity between terminals shown below.

    OK: 

    Switch Position Terminal Continuity Check table

    Switch Position Terminal No. to continuity
    LOCK - -
    ACC 2-3 -
    ON 2-3-4 6-7
    START 1-2-4 6-7-8
    Fig 8: Identifying Ignition Switch Connector terminal
    G02910441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace ignition switch. 
    2. OK: Check and replace harness and connector between ECM and ignition switch, ignition switch and battery (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
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