6E1-30
ENGINE AND EMISSION CONTROL SYSTEM
SH410
B-1 FUEL PUMP AND ITS CIRCUIT CHECK
1. ECM (PCM)
2. Fuel pump relay
3. Fuel pump
4. Main relay
STEP
ACTION
YES
NO
1
Is fuel pump heard to operate 2 se-
conds after ignition switch ON?
Fuel pump and its circuit are in good
condition.
Go to Step 2.
2
1) Remove fuel pump relay from relay
box with ignition switch OFF.
2) Connect two terminals of relay
connector as shown in figure using
service wire.
Is fuel pump heard to operate with
ignition switch ON?
Go to Step 3.
“B/R” or “P” wire open,
poor fuel pump relay-
to-coupler connection
or faulty fuel pump.
3
1) Check fuel pump relay, referring to
p.6E1-68.
Is it in good condition?
Poor fuel pump relay-to-coupler con-
nection, “Br/W” wire open or poor
E03-18 connection.
If wire and connection are OK, substi-
tute a known-good ECM (PCM) and
recheck.
Faulty fuel pump relay.
Fig. for STEP 2
1. Fuel pump relay connector
2. Service wire
Содержание Zen
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Страница 358: ... SH410 Prepared by Overseas Service Department 1st Ed January 2000 Printing January 2000 356 ...