Throttle Position (TP) Sensor On-Vehicle Inspection

Disconnect negative cable (-) at battery and coupler from TP sensor (4).
Using ohmmeter, check resistance between terminals under each condition.
If check result is not satisfactory, replace TP sensor.

TP sensor specifications

Between "1" and "3" terminals: 4.0 - 6.0 kohm

Between "2" and "3" terminals: 0.02 - 6.0 kohm (Varying linearly according to throttle valve opening)

Fig 1: Checking Resistance Between Terminals
Courtesy of SUZUKI OF AMERICA CORP.
Connect TP sensor coupler securely.
Connect negative cable (-) to battery.