Throttle Position (TP) Sensor

Disconnect negative battery cable and TP sensor connector. See Fig 1 . Using an ohmmeter, check resistance between indicated terminals. See THROTTLE POSITION (TP) SENSOR RESISTANCE table.

If resistance is not as specified, adjust TP sensor. See appropriate ADJUSTMENTS article. If resistance is not as specified after adjustment, replace TP sensor. For further diagnostic procedures, see appropriate TESTS W/CODES article.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application

Ohms

Between Terminals No. 1 & 2

With .020" (.50 mm) Clearance At Stop Screw

0-500

With .031" (.80 mm) Clearance At Stop Screw

Infinity

Between Terminals No. 1 & 4

3500-6500

Between Terminals No. 1 & 3

At Idle

300-2000

At Wide Open Throttle

⁽¹⁾ 2000-6500

⁽¹⁾	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 GENERAL MOTORS CORP.

TRANSMISSION RANGE SENSOR RESISTANCE

Gear Selector Position	Terminals No.
Park	2 & 3, 6 & 7
Reverse	6 & 8
Neutral	2 & 3, 6 & 10
Drive	6 & 9
Second	4 & 6
Low	5 & 6

Fig 2: Identifying Transmission Range Sensor Terminals

Courtesy of SUZUKI OF AMERICA CORP.

Disconnect negative battery cable. Remove instrument cluster. Connect ohmmeter between VSS and GND terminals on back of instrument cluster. Insert screwdriver into speedometer cable connector. Rotate screwdriver. See Fig 3 .
Ohmmeter reading should alternate between zero and infinity 4 times for each revolution of speedometer head. Replace speedometer if VSS does not test as described.

Fig 3: Testing Vehicle Speed Sensor (VSS)

Courtesy of SUZUKI OF AMERICA CORP.