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Throttle Position (TP) Sensor

  1. Disconnect negative battery cable and TP sensor connector. See Fig 1 . Using ohmmeter, check resistance between indicated terminals. See THROTTLE POSITION (TP) SENSOR RESISTANCE  table.
  2. If resistance is not as specified, adjust the TP sensor. See the ADJUSTMENTS article. If resistance is not as specified after adjustment, replace TP sensor. For further diagnostic procedures, see the TESTS W/CODES article.
    THROTTLE POSITION (TP) SENSOR RESISTANCE

    Application Ohms
    Between Terminals "C" & "D"
    With .008" (.20 mm) Clearance At Stop Screw 0-550
    With .016" (.41 mm) Clearance At Stop Screw Infinity
    Between Terminals "A" & "D" 3500-6500
    Between Terminals "B" & "D"
    At Idle (1) 0-2000
    At Wide Open Throttle (2) 2000-6500
    (1) To obtain idle position, apply 19 in. Hg vacuum to throttle opener.
    (2) There should be more than 2000 ohms difference between idle and wide open throttle resistance.
    Fig 1: Identifying Throttle Position (TP) Sensor Terminals
    G95D32352Courtesy of SUZUKI OF AMERICA CORP.
  3. Disconnect negative battery cable. Remove instrument cluster. Connect ohmmeter between RSW and GND terminals on back of instrument cluster. Insert screwdriver into speedometer cable connector. Rotate screwdriver. See Figure .
  4. Ohmmeter reading should alternate between zero and infinity 4 times for each revolution of speedometer cable. Replace speedometer if VSS does not test as described.
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