Electrical Components Inspection (Cont'd)

EF & EC-629prose procedure

Air flow meter idle voltage differs: SR20DE 1.3 - 1.8V vs SR20DET 1.0 - 1.5V.

TROUBLE DIAGNOSES

1
Remove distributor from engine. (Crank angle sensor harness connector should remain connected.)
2
Disconnect ignition wires.
3
Turn ignition switch "ON".
4
Rotate distributor shaft slowly by hand and check voltage between terminals ⓐ, ⓓ and ground.
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5
Visually check signal plate for damage or dust.
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Terminal	Voltage
ⓐ (180° signal)	Tester's pointer fluctuates between 5V and 0V.
ⓓ (1° signal)	Tester's pointer fluctuates between 5V and 0V.

ⓐ (180° signal)

VoltageTester's pointer fluctuates between 5V and 0V.

ⓓ (1° signal)

VoltageTester's pointer fluctuates between 5V and 0V.

If N.G., replace distributor assembly with crank angle sensor.

1
Peel air flow meter harness connector rubber as shown in the figure if the harness connector is connected.
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2
Turn ignition switch "ON".
3
Start engine and warm it up sufficiently.
4
Check voltage between terminal ⓐ and ground.

Conditions	Voltage V
Ignition switch "ON" (Engine stopped.)	Less than 1.0
Idle (Engine is warmed-up sufficiently.)	SR20DE: 1.3 - 1.8V / SR20DET: 1.0 - 1.5V

Ignition switch "ON" (Engine stopped.)

Voltage VLess than 1.0

Idle (Engine is warmed-up sufficiently.)

Voltage VSR20DE: 1.3 - 1.8V / SR20DET: 1.0 - 1.5V