TPS Inspection

Disconnect TPS harness connector and throttle opener vacuum hose. Using hand vacuum pump, apply 15 in. Hg vacuum to throttle opener to move throttle lever to idle position.
Using ohmmeter, check continuity between upper and lower terminals. See Fig 1 . See THROTTLE POSITION SENSOR (TPS) RESISTANCE table. If TPS cannot be adjusted to obtain the correct values at idle, replace TPS.

THROTTLE POSITION SENSOR (TPS) RESISTANCE

Application

Ohms

Between Terminals "C" & "D"

At Idle ⁽¹⁾

0-500

At Wide Open Throttle ⁽²⁾

Infinity

Between Terminals "A" & "D"

3500-6500

Between terminals "B" & "D"

At Idle ⁽¹⁾

300-2000

At Wide Open Throttle ⁽²⁾

2000-6500

⁽¹⁾	To obtain idle position, use hand vacuum pump to apply 19 in. Hg of vacuum to throttle opener.

⁽²⁾	There should be more than 2000 ohms difference between idle and wide open throttle readings.

Fig 1: TPS Sensor Terminal ID

Courtesy of SUZUKI OF AMERICA CORP.