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.

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

Courtesy of SUZUKI OF AMERICA CORP.

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 .
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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Throttle Position (TP) Sensor

Use the Manual With the Right Hardware

When to See a Mechanic