Mazda 323 Workshop Manual Supplement page 146

SELF-DIAGNOSIS FUNCTION
F2
:UDE No. 24 (FUEL PUMP RESISTOR/RELAY)-BP TURBO
STEP INSPECTION ACTtON
1 1 Disconnect connector from ECU and check if
1 battery voltage exists at connector terminal 1 I (L)
Yes Check ECU terminal connector for
poor
connection
with ignition switch ON
e If OK. replace ECU
c=> If not OK, repair or replace connector
NO
Go to next step
2
In same condltlon as Step 1, check if battery
Yes Repair wiring harness (W/R)
voltage exists at resistor/relay connector terminai-
I
wire (W/R)
NO
Go
to next
step
3 Check if there is continuity between fuel pump
Yes
Check for short or open
circuit
in wiring
res!stor/relay terminals C ('W/R) and D (L) from main relay (FUEL INJ relay) to
t
resistor/relay
NO
Replace resistor/relay
93GOF2-74 1
Circuit Diagram
IGNITION
SWITCH
DIAGNOSIS
CONNECTOR
rl
F/P TERMINAL *
BATTERY
IGNlTlON
0fP
W/R
FUEL
PUMF
B
c
W/R
7
FUEL PUMP
-
RESISTOR/RELAY
\I I/
ECU
MAIN RELAY
Of1
W/G . LGrf Grw l v
L/O R/Y LGlR YfL B/LG
RIB 1
I
GIB \
J 1 1 [ WR
LG ] Y , UW~LGIw/ * 1 W ] 810
WIG BfW
I
I I
I
1
I I
I
&J,~&&&l&&c!zr5& &l~&cLa~~c!zch&&&&~
1~ IS 10 10 IM 1K II tC 1E 1C IA 2Y 2w 2u 2s 20 20 28.4 2K 21 2G 2E 2C 2A
IV 17 ?R IP 1N 1~ IJ III IF ro :8
rrrrrT?rrTT
BRff t BIG 1 R/W ! t/B 1 WIB 1 W/R
BIL UY O/B WN
CIRCUIT OPENING RELAY
FUEL PUMP
FUEL PUMP RESlSTOR/RE~Y
v WIRBIP
B - LG
93GOF2.74
F2-29