Electrical Components Inspection (Cont'd)

EF & EC-631prose procedure

Fuel pump connector illustrations differ between SR20DE (SEF325L) and SR20DET (SEF326L).

TROUBLE DIAGNOSES

Electrical Components Inspection (Cont'd)

POWER TRANSISTOR

1
Disconnect power transistor harness connector.
2
Check power transistor continuity between terminals with a digital tester as shown in the figure.
SEF886K

Power transistor continuity check (⊖ terminal side across top: ⓐ, ⓑ, ⓒ; ⊕ terminal side down left)

⊕ terminal side	Terminal ⓐ Resistance Ω	Terminal ⓐ Result	Terminal ⓑ Resistance Ω	Terminal ⓑ Result	Terminal ⓒ Resistance Ω	Terminal ⓒ Result
Terminal ⓐ	—	—	∞	O.K.	∞	O.K.
Terminal ⓐ	—	—	Not ∞ or 0	N.G.	Not ∞ or 0	N.G.
Terminal ⓐ	—	—	0	N.G.	0	N.G.
Terminal ⓑ	∞	N.G.	—	—	∞	N.G.
Terminal ⓑ	Not ∞ or 0	O.K.	—	—	Not ∞ or 0	O.K.
Terminal ⓑ	0	N.G.	—	—	0	N.G.
Terminal ⓒ	∞	N.G.	∞	N.G.	—	—
Terminal ⓒ	Not ∞ or 0	O.K.	Not ∞ or 0	O.K.	—	—
Terminal ⓒ	0	N.G.	0	N.G.	—	—

Terminal ⓐ

Terminal ⓐ Resistance Ω—

Terminal ⓐ Result—

Terminal ⓑ Resistance Ω∞

Terminal ⓑ ResultO.K.

Terminal ⓒ Resistance Ω∞

Terminal ⓒ ResultO.K.

Terminal ⓐ

Terminal ⓐ Resistance Ω—

Terminal ⓐ Result—

Terminal ⓑ Resistance ΩNot ∞ or 0

Terminal ⓑ ResultN.G.

Terminal ⓒ Resistance ΩNot ∞ or 0

Terminal ⓒ ResultN.G.

Terminal ⓐ

Terminal ⓐ Resistance Ω—

Terminal ⓐ Result—

Terminal ⓑ Resistance Ω0

Terminal ⓑ ResultN.G.

Terminal ⓒ Resistance Ω0

Terminal ⓒ ResultN.G.

Terminal ⓑ

Terminal ⓐ Resistance Ω∞

Terminal ⓐ ResultN.G.

Terminal ⓑ Resistance Ω—

Terminal ⓑ Result—

Terminal ⓒ Resistance Ω∞

Terminal ⓒ ResultN.G.

Terminal ⓑ

Terminal ⓐ Resistance ΩNot ∞ or 0

Terminal ⓐ ResultO.K.

Terminal ⓑ Resistance Ω—

Terminal ⓑ Result—

Terminal ⓒ Resistance ΩNot ∞ or 0

Terminal ⓒ ResultO.K.

Terminal ⓑ

Terminal ⓐ Resistance Ω0

Terminal ⓐ ResultN.G.

Terminal ⓑ Resistance Ω—

Terminal ⓑ Result—

Terminal ⓒ Resistance Ω0

Terminal ⓒ ResultN.G.

Terminal ⓒ

Terminal ⓐ Resistance Ω∞

Terminal ⓐ ResultN.G.

Terminal ⓑ Resistance Ω∞

Terminal ⓑ ResultN.G.

Terminal ⓒ

Terminal ⓐ Resistance ΩNot ∞ or 0

Terminal ⓐ ResultO.K.

Terminal ⓑ Resistance ΩNot ∞ or 0

Terminal ⓑ ResultO.K.

Terminal ⓒ

Terminal ⓐ Resistance Ω0

Terminal ⓐ ResultN.G.

Terminal ⓑ Resistance Ω0

Terminal ⓑ ResultN.G.

If N.G., replace power transistor.

FUEL PUMP

1
Disconnect fuel pump harness connector.
2
Check resistance between terminals ⓐ and ⓑ.
SEF325L

Specification	Value
Resistancebetween terminals ⓐ and ⓑ	Approximately 0.7Ω

Resistancebetween terminals ⓐ and ⓑ

Approximately 0.7Ω

If N.G., replace fuel pump.

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Electrical Components Inspection (Cont'd)

TROUBLE DIAGNOSES