Camshaft Position Sensor Tests - Mercury V6 175 Diagnostic Manual

The camshaft position sensor is located at the top of the port valve cover.
a

Camshaft Position Sensor Tests

1. Disconnect the sensor from the engine harness.
2. Perform a visual inspection of the sensor pins and the wires coming from the engine harness connector. Look for broken,
bent, or corroded pins at the sensor and loose, broken, or corroded wires at the connector.
3. If the pins and wiring appear serviceable, perform a resistance check on the sensor. Ensure that the resistance for the
camshaft sensor at 21 °C (70 °F) is within specification.
a
b
DMT 2004 Digital Multimeter
Meter Test Leads
Red
Pin A
Pin A
Pin B
Pin B
Pin C
Pin C
4. Perform a continuity check of the sensor wiring between the sensor connector and the PCM. Note that there are splices in
both the power and ground circuits.
NOTE: Sensor power splice numbers vary between DTS and mechanical models.
DMT 2004 Digital Multimeter
90-8M0146617 eng JULY 2018
Camshaft position sensor
c
a - Pin A = output voltage
b - Pin B = ground
c - Pin C = reference voltage (5 V)
67611
Black
Pin B
Pin C
Pin A
Pin C
Pin A
Pin B
a - Port valve cover
b - Camshaft position sensor
b
67493
91‑892647A01
Meter Scale
Auto
Auto
Auto
Auto
Auto
Auto
91‑892647A01
© 2018 Mercury Marine
Sensors
Reading
5.4 MΩ ± 30%
1.0 MΩ ± 30%
2.9 MΩ ± 30%
2.9 MΩ ± 30%
1.0 MΩ ± 30%
5.4 MΩ ± 30%
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