Pin Function Wire Color Application Notes Description
BK1 Shift position sensor Green
Connects to the electronic shift control connector,
which contains a 3‑wire position sensor and 2‑wire
shift actuator circuit.
BL1 UEGO (S1) O2 sensor heater Orange/white –
O2 sensors must maintain a minimum temperature
to function. The heater speeds sensor warmup and
maintains minimum temperature during idle and low
speed operation.
BM1 Not used – – –
BA2 Not used – – –
BB2 UEGO (S1) O2 sensor Tan/green –
Connects to pin 5 of the O2 sensor connector.
Check for continuity in the harness before replacing
the sensor. To test the sensor itself, replace it with a
known good sensor.
BC2
Trim position sensor signal—
hall effect
Yellow – –
BD2
Seawater temperature sensor
signal
Tan/orange –
2‑wire thermistor. Resistance increases as
temperature decreases.
BE2
Starboard exhaust coolant
temperature sensor signal
Brown/black –
2‑wire thermistor. Resistance increases as
temperature decreases.
BF2 Not used – – –
BG2 CAN P (propulsion data)—high White –
CAN P bus carries dashboard gauge data and
backup digital throttle and shift commands. These
circuits require both high and low sides to operate.
This is the high (positive) side.
BH2
CAN X (DTS commands)—
high
Yellow –
CAN X bus carries primary digital throttle and shift
commands. These circuits require both high and low
sides to operate. This is the high (positive) side.
BJ2
Throttle position sensor (TPS)
1 signal
Light blue/black –
3‑wire position sensor. Reads low voltage when
throttle is closed, high voltage when throttle is open.
Signal is proportional to throttle plate movement.
BK2 Shift request 2 Blue/black
Not used on DTS
engines
–
BL2 Intake air temperature (IAT) Tan – –
BM2 Not used – – –
BA3 Not used – – –
BB3 UEGO (S1) O2 sensor White/purple – Connects to pin 2 of the O2 sensor connector.
BC3 UEGO (S1) O2 sensor
Light green/
orange
– Connects to pin 6 of the O2 sensor connector.
BD3 Not used – – –
BE3
Advanced sound control
diagnostics
Green Not used on V6 –
BF3 Not used – – –
BG3 Not used – – –
BH3 Not used – – –
BJ3 Not used – – –
BK3 Shift request 1 Blue/pink
Not used on DTS
engines
–
BL3
Oil pressure analog gauge
driver
Blue/yellow – –
BM3 Not used – – –
BA4 Not used – – –
BB4 Not used – – –
BC4 Not used – – –
PCM 112 Important Information and Pinouts
Page 2A-8 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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