Smartcraft Gauge Test Specifications; Test Equipment Required - Mercury 150 EFI Service Manual

WIRING DIAGRAMS

SmartCraft Gauge Test Specifications

Test Equipment Required:

1. Test Harness 84-875233A2 (a).
2. DMT 2000 Digital Tachometer Multimeter 91-854009A1 (b).
NOTE: Connect negative DMT lead to BLACK/ORANGE lead on test harness
84-875233A2 for all tests. Use positive DMT lead on all other test harness leads to deter-
mine if individual sensors are within specifications.
SENSOR
Trim
Fuel Sender
Lake Temperature
+5 vdc Sensor Power
Pitot Pressure
Oil Sender
Paddle Wheel Frequency
Page 2D-66
a
RED TEST LEAD
Yellow
Pink/Black
Tan/Orange
Purple/Yellow
White/Orange
Light Blue/Black
Gray/Blue
BLACK TEST LEAD
Black/Orange
Black/Orange
Black/Orange
Black/Orange
Black/Orange
Black/Orange
Black/Orange
b
57738
RANGE
2.7 vdc UP – 0.6 vdc
DOWN
0.65 vdc FULL – 2.92 vdc
EMPTY
2.5 vdc @ room temp.
(Voltage decreases as
temperature increases)
4.9 vdc – 5.1 vdc
0.5 vdc static
(voltage increases with
pressure)
0.63 vdc FULL – 2.89 vdc
EMPTY
Set meter to Hz and spin
paddle wheel or set meter
to AC volts and spin
paddle wheel. Hz or AC
volts should increase as
wheel spins faster.
90-883728 JULY 2001