Service Manual DF200A, DF150AP, DF175AP, DF200AP Power Head[Engine Electrical Devices[Service Instructions][Tps Inspection]]

Inspect TPS in the following procedures:

1. Turn main switch off.
2. Remove the three bolts and fuel hose guard (1).

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3. Disconnect connector (2) at electronic throttle body assembly.

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4. Check TPS (main and sub) output voltage as following steps.

a) For TPS (main), arrange 3 new 1.5 V batteries in series (check that total voltage is 4.7 — 5.0 V) and connect its positive terminal to “Vin” terminal and negative terminal to “Ground" terminal of sensor.
Then using voltmeter, connect positive terminal to “Vout 1" terminal of sensor and negative
terminal to battery.

Main output

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b) For TPS (sub), arrange 3 new 1.5 V batteries in series (check that total voltage is 4.7 — 5.0 V) and connect its positive terminal to “Vin” terminal and negative terminal to “Ground" terminal of sensor
Then using voltmeter, connect positive terminal to “Vout 2" terminal of sensor and negative
terminal to battery.

Sub output

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c) Measure output voltage variation while throttle valve is opened and closed as following
specification (graph).

TPS output voltage

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If sensor voltage is out of specified value and linear variation as the following graph, replace electronic throttle body assembly.

Refer to “Electronic Throttle Body Removal and
Installation" in Section 10 (Page 10-13).

5. Connect the connector to throttle body.

Reinstall the fuel hose guard.