Mercury V8 250 User Manual

4. Perform a continuity check on the sensor wiring between the sensor connector and the PCM. Note that there are splices in
the sensor ground circuit.
DMT 2004 Digital Multimeter 91‑892647A01
Terminal Test Probe Kit Bosch P/N MM‑ 46523
a - Manifold absolute pressure
(MAP) sensor connector
b - PCM connector C
Connector Pin Wire Color Function PCM
65665
A B
C
A Black/green Sensor ground C (–) CE3
B Yellow MAP signal CD2
C Purple/black Sensor power C (+) CE4
MAP Sensor Removal
1. Cut the cable tie, and disconnect the engine harness connector.
2. Disconnect the hose from the sensor.
3. Remove the sensor from the bracket.
a - Sensor hose
b - Cable tie
c - Engine harness connector
d - Sensor bracket
e - MAP sensor
MAP Sensor Installation
1. Install the sensor onto the bracket.
2. Connect the hose to the sensor.
3. Connect the engine harness connector to the sensor.
4. Secure the harness connection with a cable tie.
Oil Level Sensor
NOTE: The oil level sensor is not present on all models.
The oil level sensor is immersed into the oil sump. It acts as an electronic dipstick, sensing the level of the oil in the sump.
When the oil level is low, the propulsion control module (PCM) sets a fault and notifies the boat operator to check the oil level.
125A
124A
PPL/BLK
BLK/GRN
BLK/GRN
YEL
YEL
PPL/BLK
C
B
A
H4
D2
E3
E4
A1
A B C
67518
a
b
A B C
A
B
C
D
E
F
G
H
1
2
3
4
A
B
C
D
E
F
G
H
A
H
1
4
66568
a
b
c
d
e
Sensors
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 5A-27

Mercury V8 250 Specifications

General

Brand	Mercury
Model	V8 250
Category	Outboard Motor
Language	English