Throttle Position (TP) Sensor

Disconnect negative battery cable and TP sensor connector. See Fig 1 or Fig 2. Using an ohmmeter, check resistance between indicated terminals. See THROTTLE POSITION (TP) SENSOR RESISTANCE table.

Fig 1: Identifying Throttle Position (TP) Sensor Terminals (Esteem, Swift & Vitara 1.6L & 2.0L)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Identifying Throttle Position (TP) Sensor Terminals (Grand Vitara 2.5L)

Courtesy of GENERAL MOTORS CORP.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application			Ohms
Esteem & Swift
Between Terminals No. 1 & 2			2500-6000
Between Terminals No. 1 & 3
At Idle			100
At Wide Open Throttle			20,000
Vitara & Grand Vitara
Between Terminals No. 1 & 3			4000-6000
Between Terminals No. 1 & 2 (Vitara)
At Idle			20
At Wide Open Throttle			6000
Between Terminals No. 2 & 3 (Grand Vitara)
At Idle			0
At Wide Open Throttle			4600

THROTTLE POSITION (TP) SENSOR VOLTAGE ⁽¹⁾

Application

Volts

Esteem (1.8L) & Grand Vitara ⁽²⁾

At Idle

.35-.65

At Wide Open Throttle

3.5-4.5

⁽¹⁾	Ignition on and engine off.

⁽²⁾	Measure voltage at ECM connector terminal No. C20-25 (Esteem 1.8L) or C51-3-12 (Grand Vitara). See PIN VOLTAGE/CIRCUIT RESISTANCE CHARTS article.

On Grand Vitara 2.5L, if resistance is not as specified, adjust TP sensor. See THROTTLE POSITION (TP) SENSOR in ON-VEHICLE ADJUSTMENTS article. If resistance is not as specified after adjustment, replace TP sensor. For further diagnostic procedures, see appropriate SELF-DIAGNOSTICS article. On Esteem 1.8L and Grand Vitara, see THROTTLE POSITION (TP) SENSOR VOLTAGE table.