Pontiac Fiero 1988 Service Manual page 602

DRIVEABILITY AND EMISSIONS - FUEL M?E€T1GM {PORT) 6E3-A-19
| N O T I C E -
EFI SYSTEM UNDER PRESSURE. TO AVOID FUEL
SPILLAGE, REFER
| TO FIELD SERVICE PROCEDURES FOR TESTING OR MAKING
i
REPAIRS REQUIRING DISASSEMBL Y OF FUEL LINES OR FITTINGS.
FROM CHART
A-3 or A-7
N O P R E S S U R E
C H E C K F U E L P U M P F U S E
©
O K
W I T H • P R O B E A L D L F U E L P U M P T E S T T E R M . " G
A T E S T L I G H T T O G R O U N D .
• I G N I T I O N " O F F " F O R T E N S E C O N D S .
• N O T E L I G H T W I T H I N T E N S E C . A F T E R I G N " O N
©
L I G H T " O N "
L I G H T " O F F "
©
A P P L Y B A T T E R Y
V O L T A G E T O P U M P
T E S T C O N N E C T O R .
L I S T E N F O R P U M P
R U N N I N G A T F U E L
T A N K .
©
• D I S C O N N E C T P U M P R E L A Y
• I G N I T I O N " O N " , E N G I N E
S T O P P E D
• P R O B E R E L A Y H A R N E S S
C O N N E C T O R T E R M I N A L
" D " W I T H A T E S T L I G H T T O
G R O U N D .
©
L I G H T '
— r
O N "
3 -
U G H T '
C O N N E C T A T E S T L I G H T
B E T W E N H A R N E S S
C O N N E C T O R T E R M I N A L S
" C " A N D " D " .
O F F ' 0
• R E P A I R
O P E N
C K T 4 4 0 .
P U M P R U N S
3 L
C H A R T A - 7
( P A G E 3 O F 4 )
P U M P M O T R U N N I N G
B L O C K F U E L R E T U R N L I N E B Y
P I N C H I N G F L E X I B L E H O S E
A N D N O T E P R E S S U R E .
NOT OK
X
D I S C O N N E C T FUEL P U M P A T R E A R
B O D Y C O N N E C T O R .
I G N I T I O N " O F F " .
P R O B E A L D L F U E L P U M P T E S T
T E R M I N A L " G " , C K T 1 2 0 , W I T H A
T E S T L I G H T T O 1 2 V O L T S .
L I G H T "OFF"
zrzzi::::
3L
LIGHT' OH"
R E C O N N E C T FUEL
? " J M P .
REPLACE
FUSE.
J G N I T < C N " O N " . RECHECK
FUSE.
RcPAIR SHORT
T O G R O U N D IN
C K T
120.
* DEFECTIVE
FUSE
SHORT ~i 0
G R O U N D IM C K T
120, OR P U M P .
C H E C K F O R ;
- O P E N W I R E IN C K T . 1 2 0 .
- O P E N P U M P G R O U N D W I R E C K T
15C\
P R E S S U R E
B E L O W 2 8 0 K P A
( 4 0 P S I ) .
P R E S S U R E A B O V E
2 8 0 K P A ( 4 0 P S I ) .
IF
FUSE
B L O W S O U T
A S SOON A S I T ' S
S T A L L E D , CHECK
F O R S H O R T T O G N D
m
C K T 440 T O R E L A Y
A M D O I L P R E S S U R E
S W I T C H . IF O K , I N -
T A N K F U E L P U M P O R
PUMP H A R N E S S
S H O R T E D T O
G R O U N D .
IF O K
R E P L A C E P R E S S U R E
R E G U L A T O R A N D
R A I L A S S E M B L Y .
• C H E C K F O R ;
- P L U G G E D I N - L I N E F I L T E R .
- P L U G G E D P U M P I N L E T F I L T E R .
- R E S T R I C T E D F U E L L I N E .
- L E A K I N G P U M P R U B B E R C O U P L I N G O R P U L S A T O R .
X
IF O K
IE
R E P L A C E I N - T A N K F U E L P U M P .
6 - 1 8 - 8 7
* 5 S 1 9 0 3 - 6 E