Code 510, need some help (FSM at home)

Discussion in '80-Series Tech' started by DRTDuck, Jul 14, 2005.

  1. DRTDuck

    DRTDuck

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    I am traveling with the family (FSM at home). CEL comes on, but everything is running smoothly. Pull the code at local autoparts. It is 510 - Throttle Position Switch Malfuction.

    I searched here, found a couple of threads about folks pulling the TPS Sensor before cleaning the throttle body. Someone else mentioned a crake or leak in the intake can cause that code. No cracks or leaks and I have not had the TB off.

    Is 510 a problem with the actual sensor?

    Where is the sensor?

    Can it be tested or it is toast if that is the code?
     
  2. IdahoDoug

    IdahoDoug

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    bump - anyone on have a 96 FSM handy?

    DougM
     
  3. offroadr1

    offroadr1

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    it is not uncommon for the tps to go out after there are many many mile on a vehicle. i think it is like $120 at a dealer. the best way for you to put it on would be ussing a multimeter set for ohms. measure between terminals 1 and 2. turn the sesor to one side and you should get 0ohms. at the other side you should get like ~30 ohms. set it to 0 ohms rihg t at the edge of where it deflects from whatever # it may show and 0ohms. i hope i didnt confuse you with this. and hope it helps.
     
  4. CharlieS

    CharlieS

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    1. INSPECT THROTTLE BODY
    (a) Check that the throttle linkage moves smoothly.
    (b) Check the vacuum at each port.
     Start the engine.
     Check the vacuum with your finger.
    Port name At idle At 3,500 rpm
    P No vacuum Vacuum
    E No vacuum Vacuum
    R No vacuum Vacuum
     
  5. CharlieS

    CharlieS

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    2. INSPECT THROTTLE POSITION (TP) SENSOR
    (a) Disconnect the TP sensor connector.
    (b) Apply vacuum to the throttle opener.
    (c) Using an ohmmeter, measure the resistance between
    each terminal.
    Throttle valve Between Resistance
    condition terminals
    Fully closed VTA – E2 0.2 – 5.7 kW
    Fully closed IDL – E2 2.3 kW or less
    Open IDL – E2 Infinity
    Fully open VTA – E2 2.0 – 10.2 kW
    – VC – E2 2.5 – 5.9 kW

    (d) Reconnect the TP sensor connector.
     
  6. CharlieS

    CharlieS

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    3. INSPECT AND ADJUST DASHPOT
    (a) Allow the engine to warm up to normal operating temperature.
    (b) Check the idle speed.
    Idle speed: 650 ± 50 rpm (N position)
    (c) Open the throttle valve until the throttle lever separates
    from the dashpot end.
    (d) Release the throttle valve gradually, and check the dashpot
    setting speed when the throttle lever touched the
    dashpot end.
    Dashpot setting speed: 2,200 ± 300 rpm
    If not as specified, adjust using the following procedure:
    (1) Stop the engine.
    (2) Loosen the lock nut of the stopper bolt.
    (3) Adjust the dashpot setting speed by turning the
    stopper bolt.
    (4) Start the engine and check the dashpot setting
    speed.
    (5) Retighten the lock nut.
    (e) Maintain the engine at 3,500 rpm.
    (f) Release the throttle valve, and check that the engine returns
    to idle in a few seconds.
     
  7. CharlieS

    CharlieS

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    4. CHECK THROTTLE OPENER
    (a) Disconnect the vacuum hose from the throttle opener,
    and plug the hose end.
    (b) Check the throttle opener setting speed.
    Throttle opener setting speed: 700 – 1,000 rpm
    If the throttle opener setting is not as specified, replace the
    throttle body.
    (c) Stop the engine.
    (d) Reconnect the vacuum hose to the throttle opener.
    (e) Start the engine, and check that the idle speed returns to
    the correct speed.
    Idle speed: 650 ± 50 rpm (N position)
     
  8. CharlieS

    CharlieS

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    DTC P0510 Closed Throttle Position Switch Malfunction
    CIRCUIT DESCRIPTION
    Refer to DTC P0120 (Throttle/Pedal Position Sensor/Switch ”A” Circuit Malfunction) on page DI–35.
    DTC No. DTC Detecting Condition Trouble Area
    P0510
    The closed throttle position switch does not turn ON or OFF
    even once when the vehicle is driven
    (2 trip detection logic)
     Open or short in closed throttle position switch circuit
     Closed throttle position switch
    ECM
    HINT:
    After confirming DTC P0510 use the TOYOTA hand–held tester to confirm the closed throttle position switch
    signal from ”CURRENT DATA”.
    Throttle Valve Closed Throttle Position Switch Signal Malfunction
    Fully closed OFF Open circuit
    Fully open ON Short circuit
     
  9. CharlieS

    CharlieS

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    WIRING DIAGRAM
    Refer to DTC P0120 (Throttle/Pedal Position Sensor/Switch ”A” Circuit Malfunction) on page DI–35 for WIRING
    DIAGRAM.
    INSPECTION PROCEDURE
    HINT:
    If DTCs P0110 (Intake Air Temp. Circuit Malfunction), P0115 (Engine Coolant Temp. Circuit Malfunction),
    P0120 (Throttle/Pedal Position Sensor/Switch ”A” Circuit Malfunction) are output simultaneously, E2 (Sensor
    Ground) may be open.
    TOYOTA hand–held tester
    1 Connect the TOYOTA hand–held tester and read CTP switch signal.
    PREPARATION:
    (a) Remove the fuse cover on the instrument panel.
    (b) Connect OBD II scan tool or TOYOTA hand–held tester to the DLC3.
    (c) Turn ignition switch ON and OBD II scan tool or TOYOTA hand–held tester main switch ON.
    CHECK:
    Read CTP switch signal on TOYOTA hand–held tester.
     
  10. CharlieS

    CharlieS

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    RESULT:
    Throttle Valve Closed Throttle Position Switch Signal Malfunction
    Fully closed OFF Open circuit: Go to step 2
    Fully open ON Short circuit: Go to step 4

    2 Check for open in harness or ECM.
    PREPARATION:
    (a) Disconnect throttle position sensor connector.
    (b) Connect sensor wire harness terminals between
    terminals 1 and 2.
    (c) Turn ignition switch ON.
    CHECK:
    Read CTP switch signal on TOYOTA hand–held tester.
    OK:
    CTP switch signal: ON
    OK Confirm good connection at sensor.
    If OK, replace throttle position sensor.
     
  11. CharlieS

    CharlieS

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    NG
    3 Check for open in harness or ECM.
    PREPARATION:
    (a) Remove instrument panel speaker No.1 panel
    (See page SF–65).
    (b) Connect between terminals IDL and E2 of ECM.
    HINT:
    Throttle position sensor connector is disconnected.
    Before checking, do a visual check and contact pressure check
    for connector (See page IN–28).
    (c) Turn ignition switch ON.
    CHECK:
    Read CTP switch signal on TOYOTA hand–held tester.
    OK:
    CTP switch signal: ON
    OK Open in harness between ECM and throttle
    position sensor, repair or replace harness.
    NG
    Confirm connection at ECM.
    If OK, replace ECM (See page IN–28).
     
  12. CharlieS

    CharlieS

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    4 Check for short in harness or ECM.
    PREPARATION:
    (a) Disconnect throttle position sensor connector.
    (b) Turn ignition switch ON.
    CHECK:
    Read CTP switch signal on TOYOTA hand–held tester.
    OK:
    CTP switch signal: OFF
    OK Confirm good connection at sensor.
    If OK, replace throttle position sensor.
    NG
    5 Check for short in harness or ECM.
    PREPARATION:
    (a) Remove instrument panel speaker No.1 panel
    (See page SF–65).
    (b) Disconnect E5 connector of ECM.
    HINT:
    Throttle position sensor connector is disconnected.
    (c) Turn ignition switch ON.
    CHECK:
    Read CTP switch signal on TOYOTA hand–held tester.
    OK:
    CTP switch signal: OFF
    OK Short in harness between ECM and throttle
    position sensor, repair or replace harness.
    NG
    Confirm connection at ECM.
    If OK, replace ECM (See page IN–28).
     
  13. CharlieS

    CharlieS

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    OBD II scan tool (excluding TOYOTA hand–held tester)
    1 Check for open and short in harness or ECM.
    PREPARATION:
    (a) Disconnect throttle position sensor connector.
    (b) Turn ignition switch ON.
    CHECK:
    Measure voltage between terminals 1 and 2 of throttle position
    sensor connector.
    OK:
    Voltage: 9 – 14 V
    OK Confirm good connection at sensor.
    If OK, replace throttle position sensor.
    NG
    2 Check for open and short in harness and connector between throttle position
    sensor and ECM (See page IN–28).
    NG Open or short in harness between ECM and
    throttle position sensor.
    OK
    Confirm connection at ECM.
    If OK, replace ECM (See page IN–28).
     
  14. CharlieS

    CharlieS

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    Let me know if you need more info from the '96 FSM.

    Charlie
     
  15. DRTDuck

    DRTDuck

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    Charlie, thank you so much.

    Holy crap, that is alot of steps. If I knew is was definately the sensor, I'd just buy a new one as opposed to doing all that!

    I'll get under there and see what I can determine.

    Thank you again.
     
  16. Nemo

    Nemo

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    Has or Can someone check what voltage they are getting at the TPS sensor when performing the "Measure voltage between terminals 1 and 2 of the throttle position sensor connector."

    CAN someone post up what they get??? Please



    OBD II scan tool (excluding TOYOTA hand–held tester)
    1 Check for open and short in harness or ECM.
    PREPARATION:
    (a) Disconnect throttle position sensor connector.
    (b) Turn ignition switch ON.
    CHECK:
    Measure voltage between terminals 1 and 2 of throttle position
    sensor connector.
    OK:
    Voltage: 9 – 14 V
    OK Confirm good connection at sensor.
    If OK, replace throttle position sensor.
    NG
    2 Check for open and short in harness and connector between throttle position
    sensor and ECM (See page IN–28).
    NG Open or short in harness between ECM and
    throttle position sensor.
    OK
    Confirm connection at ECM.
    If OK, replace ECM (See page IN–28).
     
  17. Nemo

    Nemo

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    I could really use the help. I have thrown 2 code 510's in the last couple of weeks which is the Closed Throttle Position Sensor position. I have had an erratic shifting problem when I hit the brake pedal, which I still haven't figured out, but the FSM says that when testing Pin's 1 and 2 together that I should see 9 - 14 volts. I get 7.2 Volts there and I get the same back at the ECU. I am just trying to see what others get if they actually test the pins. Isn't too hard to test and any help would be appreciated.
     
  18. Nemo

    Nemo

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    Just wanted to update everyone. My transmission problem is fixed as well as my TPS is solved. It was a bad wire from the ECU to the TPS. It was the IDL wire (Green / White) and must have been toasted somewhere between. The only other thing I have to work on is getting my Cruise Control ECU hooked back in which is a Splice from the Green / White to the IDL of the TPS. Not even sure how much I care being here in the beautiful rockies. CC doesn't do much anyways :)... Well I probably should see Christo and Team to get them to clean up my wiring. Have you seen one of them solder. Work of art. Mine... Blobs of metal, but functioning at least.
     
  19. PresaDad

    PresaDad

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    TPS

    Can anyone please let me know if the Throttle position sensor's connector is sold separate from the sensor? My sensor is good, but the connector's head is cracked.
    Please help!
     
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