Mercury V6 175 Diagnostic Manual page 36

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