Throttle Position Sensor: Adjustments

Description:

TPS Adjustment Metro W/ Upgraded Emissions:

Description:

Description:

Adjustment Procedure
Using a Digital Multimeter (J 39200 or equivalent) perform the following steps:
1. Insert a 3.5 mm (0.14-inch) feeler gage between the throttle stop screw and the throttle lever.
2. Inspect the Idle Speed Control (ISC) motor plunger. If the ISC motor plunger is contacting the throttle lever screw, then the engine must be brought to operating temperature.
3. Back probe the TP sensor signal circuit at the PCM connector to ground.
4. Turn ON the ignition.
5. While observing TP sensor voltage on the DVM, turn the TP sensor until the voltage reading is 0.98 to 1.02 volts. Tighten the TP sensor screws to 2.0 Nm (18 lb. in.). Using a scan tool perform the following steps:
1. Insert a 3.5 mm (0.14-inch) feeler gage between the throttle stop screw and the throttle lever.
2. Inspect the Idle Speed Control (ISC) motor plunger. If the ISC motor plunger is contacting the throttle lever screw, then the engine must be brought to operating temperature.
3. Connect a scan tool to the Data Link Connector (DLC) and select the TP sensor voltage parameter.
4. Turn ON the ignition.
5. While observing TP sensor voltage on the scan tool, turn the TP sensor until the voltage reading is 0.98 to 1.02 volts. Tighten the TP sensor screws to 2.0 Nm (18 lb. in.).