90-823225--1 1096
5E-86 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
Discrete Input Circuit Check (Power Reduction Mode) (Non-Scan)
(1 of 2)
TO SYSTEM
RELAY TERM
“87”
TO BUZZER
TO IGN
TO AUDIO
WARNING
SWITCHES
TO TACH
J1-6
931 BRN
TAN/
BLU
PPL
BLU/
TAN
GRY
TO
IGN
COIL
D
C
B
A
PUR
121 WHT
121 TAN
TO BUZZER
(COOLANT OVERTEMP)
TO BUZZER
(AUDIO WARNING SWITCHES)
FROM AUDIO WARNING
SWITCHES
3 PNK
CIRCUIT DESCRIPTION:
Several discrete switch inputs are utilized by the fuel
injection system to identify abnormal conditions that
may affect engine operation. A pull-up switch is cur-
rently used in conjunction with the ECM to detect criti-
cal conditions to engine operation.
If a switch changes states from its normal at-rest
position, that is normally open to closed, the ECM
senses a change in voltage and responds by entering
power reduction mode. (And activating the audio
warning system.)
NOTE: Power reduction mode is not used 1997 and
later models.
This engine protection feature allows the driver full
engine power up to 2800 RPM, but disables four fuel
injectors above 2800 RPM until the engine RPM
drops to 1200 RPM.
This feature allows the operator a comfortable ma-
neuvering speed while removing the possibility of
high RPM engine operation until the problem is cor-
rected.
TEST DESCRIPTION:
NOTE: Refer to Section 4C to test transmission tem-
perature switch.
1. This step checks if wiring from the engine
switches to the ECM is not shorted to ground.
2. This step ensures that the discrete switches are
functioning properly by changing state. (I/O oil
level, transmission temperature will not change
state.)
DIAGNOSTIC AIDS:
•
Check engine oil and I/O fluid levels, transmis-
sion fluid, overheat.
•
If above diagnostics are performed and no
change in performance is made, refer to “Trou-
bleshooting.”
An intermittent problem may be caused by a poor or
corroded connection, rubbed through wire connec-
tion, or a wire that is broken inside the insulation.
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Страница 7: ...A 1 72000 IMPORTANT INFORMATION GENERAL INFORMATION...
Страница 16: ...B 1 IMPORTANT INFORMATION MAINTENANCE...
Страница 59: ...C 1 IMPORTANT INFORMATION TROUBLESHOOTING...
Страница 92: ...A 2 72975 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES...
Страница 103: ...B 2 70246 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES WITH DRIVESHAFT EXTENSION...
Страница 120: ...2 72580 C REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES...
Страница 135: ...D 2 70246 REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES WITH DRIVESHAFT EXTENSION...
Страница 154: ...E 2 70648 REMOVAL AND INSTALLATION MIE MODELS VELVET DRIVE TRANSMISSIONS...
Страница 173: ...F 2 25280 REMOVAL AND INSTALLATION MIE MODELS HURTH TRANSMISSIONS...
Страница 189: ...A 3 72615 ENGINE 5 0L 305 CID 5 7L 350 CID...
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Страница 360: ...D 4 72747 ELECTRICAL SYSTEM INSTRUMENTATION...
Страница 380: ...E 4 72761 ELECTRICAL SYSTEM ELECTRICAL KITS...
Страница 393: ...F 4 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS...
Страница 427: ...A 5 50830 90 823224 692 5A FUEL DELIVERY SYSTEMS AND FUEL PUMPS FUEL SYSTEM FUEL DELIVERY SYSTEMS AND FUEL PUMPS...
Страница 438: ...B 5 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR...
Страница 467: ...C 5 72085 FUEL SYSTEMS ROCHESTER 4 BARREL CARBURETOR...
Страница 497: ...D 5 70389 90 823224 692 5B WEBER 4 BARREL CARBURETOR FUEL SYSTEMS WEBER 4 BARREL CARBURETOR...
Страница 538: ...5 71692 E FUEL SYSTEMS MULTI PORT AND THROTTLE BODY FUEL INJECTION...
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Страница 727: ...F 5 73662 FUEL SYSTEMS BOS SAV EMISSIONS...
Страница 744: ...A 6 22381 COOLING SYSTEM SEAWATER COOLING MODELS...
Страница 773: ...B 6 72987 COOLING SYSTEM CLOSED COOLED MODELS...
Страница 823: ...A 7 72699 EXHAUST SYSTEM GENERAL...
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Страница 829: ...B 7 72695 EXHAUST SYSTEM MANIFOLDS AND ELBOWS...
Страница 835: ...C 7 70593 EXHAUST SYSTEM RISERS...
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Страница 844: ...D 7 72737 EXHAUST SYSTEM COLLECTORS...
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Страница 856: ...A 8 DRIVES VELVET DRIVE IN LINE TRANSMISSION...
Страница 869: ...B 8 DRIVES VELVET DRIVE V DRIVE AND WALTER V DRIVE TRANSMISSION...
Страница 882: ...C 8 25280 DRIVES HURTH DOWN ANGLE TRANSMISSION...
Страница 932: ...E 8 DRIVES DRIVE SHAFT PROPELLER SHAFT MODELS...
Страница 947: ...A 9 72951 POWER STEERING PUMP...