Checking/Adjusting the Throttle Position Sensor (Mazda Familia BG)

Contents: Cars with manual transmission ⇓ Examination ⇓ Adjustment ⇓

Cars with manual transmission

The throttle position sensor should be checked if the engine has poor throttle response, rough idle, and does not achieve maximum power. The throttle position sensor should also be checked as part of maintenance.

Examination

1. Disconnect the plug from the throttle position sensor.

2. Using a flat feeler gauge, adjust the distance between the throttle stop bolt and the stop lever.

3. Connect an ohmmeter and check the current flow between the terminals.

Engine	Thickness of the feeler gauge	Between contacts	Current flow
Engine	Thickness of the feeler gauge	Between contacts	yes	no
B6 to 9/89	0.5 mm	IDL — TL	X
	0.5 mm	PSW — TL		X
	0.7 mm	IDL — TL		X
	0.7 mm	PSW — TL		X
VZ, V6 from 10/89 BP	0.1 mm	IDL — TL	X
	0.1 mm	PSW — TL		X
	1.0 mm	IDL — TL		X
	1.0 mm	PSW — TL		X
All	The throttle valve is fully open	IDL — TL		X
All	The throttle valve is fully open	PSW — TL	X

4. If the result of one of these measurements does not correspond to the required value, the throttle position sensor must be adjusted.

5. Connect the plug to the sensor.

Adjustment

1. Disconnect the throttle position sensor plug.

2. Connect an ohmmeter between the TL and IDL contacts.

3. Adjust the distance between the throttle stop screw and the stop lever to the required value using a flat feeler gauge.

Required value: up to 9/89: 0.5 mm since 10/89: 0.4 mm

Required value: up to 9/89: 0.5 mm since 10/89: 0.4 mm

4. Loosen the throttle position sensor mounting bolts.

5. Turn the sensor 30° to the right, then slowly turn it back until the ohmmeter starts to show current flow.

6. Insert a 0.7 mm thick feeler gauge between the throttle stop screw and the stop lever. Now there should be no current flowing at the terminals. If current flows, the adjustment should be repeated.

7. Tighten both mounting bolts with force 2 Nm.