Daihatsu F300 Service Manual page 1423

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Inspection of fuel pump relay
1. Check of fuel pump relay operation
When the ignition switch is set to the ON position, check to
see if the relay emits an operating sound. Or check to see
if you wm feel an operating vibration with a screwdriver or
the like placed on the relay.
CAUTION:
• The relay may become very hot during the operation .
. Hence, do not touch the relay by your hand.
2. Inspection of relay continuity
(1) Check that there is continuity between the terminals
<D
and®.
(2) Check that there is no continuity between the terminals
@and@ .
(3) Check that there is no continuity between the terminals
<D
and
®
and also between the terminals
<D
and @.
(4)
Check that there is no continuity between the term·,nals
® and @ and also between the terminals ® and @.
If the continuity test results do not conform to specifications,
replace the relay.
3. Inspection of relay operation
(1) Apply the battery voltage across the terminals
CD
and
®
(2) Check that there is continuity between the terminals@
and@.
If the operation test results do not conform to specifications,
replace the relay.
4. If the fuel pump relay persists
to
be inoperative after the
checks 1 through 3 have been performed satisfactorily,
check the following items.
( 1) Fusible links
(2) lgnnion switch
(3) Fuses
(4) Main relay
(5) Wiring and wiring connector
(6) ECU
EF-55
EFISYSTEM
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