Throttle Position Sensor: Testing and Inspection

Throttle Position (TP) Sensor On-Vehicle Inspection

Using SUZUKI Scan Tool

1) Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
2) Warm up engine and stop it when its temperature has reached normal operating temperature (Check to make sure that they have some clearance between fast idle cam and cam follow lever.).
3) Check "TP Sensor Volt" value displayed on scan tool under the following each condition.

If measured value is out of specified range, adjust installation angle of TP sensor referring to Adjustments Throttle Position (TP) Sensor Adjustment.

Also check that "TP Sensor Volt" value varies according to throttle valve opening linearly. If not, it is possible that TP sensor has failed. Replace.
Special Tool
SUZUKI scan tool (Tech 2 kit)

TP sensor voltage
When throttle is fully close: 0.50 ± 0.15 V
When throttle is fully open: 4.0 ± 0.5 V










Not Using SUZUKI Scan Tool

1) Remove ECM (1) referring to Service and Repair Engine Control Module (ECM) Removal and Installation.
2) Warm up engine and stop it when its temperature has reached normal operating temperature (Check to make sure that they have some clearance between fast idle cam and cam follower lever.).
3) Using voltmeter, check voltage at "C46-25" terminal under the following each condition.

TP sensor voltage
When throttle is fully close: 0.50 ± 0.15 V
When throttle is fully open: 4.0 ± 0.5 V





If measured voltage is out of specified range, adjust installation angle of TP sensor referring to Adjustments Throttle Position (TP) Sensor Adjustment.

Also check that voltage varies according to throttle valve opening linearly. If not, it is possible that TP sensor has failed. Replace.
4) Upon completion of checking, install ECM.