Evinrude E-Tec 40 HP Service Manual page 110

ELECTRICAL AND IGNITION
SystemCheck CIRCUIT TESTS
the two conn ectors, replace
gauge.
2
1. Purple wire
2. Tan/blue wire
Turn the key switch OFF and reconnect all discon-
nected circuits.
CHECK ENGINE Circuit Test
Separate th e 6 -pin SystemCheck connector of
MWS instrument harness from engine
Black wire (pin 3) must be grounded.
Using a jumper wire, connect tan/orange wire (pin
2) to a clean engine ground.
Turn the key switch ON. After the normal self-test
sequence, the CHECK ENGINE light should stay
on.
If the CHECK ENGINE light is not on, test circuit
•
for continuity. Check continuity of the MWS
instrument harness (tan/orange wire).
Check cont inuity of the engine wire harness
•
between terminal 2 (tan/orange wire) of the Sys-
temCheck connector and pin 17 of the EMM J1-
A connector.
Turn the key switch OFF and reconnect all discon-
nected circuits.
108
SystemCheck
1
DRC6280
harness.
WATER TEMP/ HOT Circuit Test
The tan wire of engine harness and the MWS har-
ness receives a signal f rom the EMM. The EMM
receives information from th e temperature sensor
on the cylinder head.
Using a ju mper wire, con nect tan wire (pin 6) of
the engine harn ess connector to a cle an engine
ground.
Turn the key switch ON. After the normal se lf-test
sequence, t he ga uge WATER TEMP / HOT indi-
cator should stay on.
If L ED is n ot on, test circuit for continuity . Test
•
for con tinuity of both the engine harness (t
wire) and th e MW S instrument harn ess (t an
wire).
Turn the key switch OFF and reconnect all discon-
nected circuits.
To test the temp erature sensor
IMPORTANT:
itself, refer to Engine Temperature Sensor Test
on p. 96.
002079
an