Lanyard Stop Circuit Check (Emergency Stop) Circuit Check
(1 of 2)
ECM
IN LINE 2 WAY
CONNECTOR
NORMALLY
OPEN
LANYARD STOP SWITCH CIRCUIT
A
B
942 PNK
J1-21
1996
AND EARLIER MODELS
BLK
LANYARD STOP SWITCH
NOTE: Some models are no longer equipped with
this option in the wiring harness. Connection of the
lanyard stop switch (if equipped) is performed at the
instrument panel.
4. This step identifies which half of the circuitry is
shorted to ground; i.e., ECM side or switch side.
5.
This step identifies if the circuitry or ECM is the
cause of the short to ground.
CIRCUIT DESCRIPTION:
DIAGNOSTIC AIDS:
The Lanyard Stop circuit is a safety feature incorpo-
rated in boats to stop the engine in the event that the
operator is removed from a safe control position dur-
ing normal operation. The Lanyard Stop switch is a
normally open switch that is physically connected to
the operator by a tether. In the event that the operator
is removed from a control position, the tether con-
nected to the switch will be pulled out, closing the
switch. This information from the Lanyard Stop
switch will then be used by the ECM to cease engine
operation until the position of the switch is restored
to its normally open position and the ignition key
switch has been cycled.
An intermittent problem may be caused by a poor or
corroded connection, rubbed through wire connec-
tion, a wire that is broken inside the insulation, or a
corroded wire.
Any circuitry that is suspected as causing the inter-
mittent complaint should be thoroughly checked for
backed-out terminals, improper mating, broken
locks, improperly formed or damaged terminals, poor
terminal-to-wiring connections, corroded terminals
and/or wiring, or physical damage to the wiring har-
ness.
TEST DESCRIPTION:
1.
2.
3.
If a Lanyard Stop was recognized by the ECM,
cycling the ignition will clear the Lanyard Stop
condition in the ECM.
ThisstepcheckstoseeiftheLanyardStopswitch
is in the correct position. If the switch is closed, a
Lanyard Stop condition will exist.
This step checks for Lanyard Stop switch or Lan-
yard Stop circuitry that is shorted to ground.
Index
5C-80 - 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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Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
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