Throttle Body Injection Fuel System Diagnosis (Continued)
Chart A-7 (5 of 6)
TO
SYSTEM
RELAY
ECM
902 RED
339 PNK/BLK
FUEL PUMP
RELAY FUSE
15A
87a
30
FUEL
PUMP
RELAY
FUEL PUMP
RELAY DRIVER
8
5
465 DK GRN/WHT
150 BLK
J2-9
86
87
450 BLK/WHT
120 GRY
A
M
B
FUEL PUMP
TEST DESCRIPTION:
Number(s) below refer to circled number(s) on the
diagnostic chart.
1.
This step checks if there is power to the fuel pump
relay.
2.
Bypassing the relay circuit should cause the fuel
pump to run. This step should identify if the fault
is in the relay or in the fuel pump circuit.
3.
4.
This step checks if there is an open in the ground
circuit.
This step checks if the ECM is functioning proper-
ly.
Index
5C-70 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
90-823224--2 796
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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