Pin Function Wire Color
Application
Notes
Description
CA1 Oil pressure signal Light blue – –
CB1 Oil temperature Tan/light blue – –
CC1 12 V wake circuit (+) Purple –
12 V battery positive when key is on. When the key switch is
turned off, software shuts down the PCM after a delay.
CD1
Coolant temperature
analog
Brown – –
CE1 Sensor ground A Black/orange –
Dedicated signal return path (ground) for sensors powered
by sensor power A.
CF1 Sensor power A Purple/yellow –
Dedicated 5 V positive power supply for engine sensors.
Maintains 5 V regardless of battery voltage fluctuations.
CG1 PCM ground 1 Black/white –
One of three (AG3, CG1, CG2) PCM ground pins. These
circuits end at the battery negative terminal.
CH1 Throttle actuator B low Blue/red – –
CA2 Start/stop signal Yellow/red
Not used on
DTS engines
Connects to 14‑pin connector.
CB2
Fuel level 2 sensor
signal
Brown –
Circuit is designed to read low resistance sensors, typically
between 0 and 200 ohms. Uses standard fuel tank sending
units.
CC2 Trim up
Light blue/
white
–
When the trim up switch is activated, the PCM is sent a wake
signal, much like the key switch does, and allows the
software to trim the engine up.
CD2
Manifold absolute
pressure (MAP) sensor
signal
Yellow –
PCM uses the MAP signal and RPM to determine the density
of the air flowing through the engine. When running, the
signal should be constantly changing. No movement =
clogged sensor.
CE2 Sensor ground B Black/pink
Not used on
DTS engines
Dedicated signal return path (ground) for sensors powered
by sensor power B (XDRP_B).
CF2 Sensor power B Purple/green
Not used on
DTS engines
Dedicated 5 V positive power supply.
CG2 PCM ground 2 Black/white –
One of three (AG3, CG1, CG2) PCM ground pins. These
circuits end at the battery negative terminal.
CH2 Throttle actuator A high Black/red – –
CA3 Trim position analog Orange/green – –
CB3
Pitot pressure sensor
signal
White/orange –
Pitot sensor data provides boat speed data to SmartCraft
gauges. If a paddle wheel sensor is also installed, the paddle
provides slow speed data, while the pitot provides high speed
data.
CC3 Trim down Green/white –
When the trim switch is activated, the PCM is sent a wake
signal, much like the key switch does, and allows the
software to trim the engine down.
CD3 Not used – – –
CE3 Sensor ground C Black/green –
Dedicated signal return path (ground) for sensors powered
by sensor power C (XDRP_C).
CF3 Advanced sound control White/black Not used on V6 –
CG3 Driver 1 power Red/blue –
Battery positive into the PCM from the main power relay
(MPR) pin 30. The PCM controls the MPR through pin AA2.
This power is used for high current actuators.
CH3
Shift actuator B
(negative)
Black – –
CA4 Continuous battery Red/black –
Continuous battery power for the PCM. Connects directly to
the engine battery and is protected with a 5 A fuse. Do not
connect to a battery switch.
CB4 Block water pressure White/green – –
PCM 112 Important Information and Pinouts
Page 2A-10 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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