Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA2009CX-9 FWD V6-3.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCAMSHAFT POSITION SENSORTESTING AND INSPECTION
2009 Mazda CX-9 FWD V6-3.7L
Camshaft Position Sensor: Testing and Inspection
2009 Mazda CX-9 FWD V6-3.7LSECTION Testing and Inspection
CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZI-3.7]
NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. Description and Operation
Visual Inspection
1. Remove the CMP sensor. Service and Repair
2. Verify that there are no metal shavings on the CMP sensor.
3. Install the CMP sensor. Service and Repair
Resistance Inspection
1. Remove the CMP sensor connector.
2. Measure the resistance between the CMP sensor terminals.
- If not within the specification, replace the CMP sensor. Service and Repair
- If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection".
CMP sensor resistance
- 800-1,320 ohms
Circuit Open/Short Inspection
1. Disconnect the PCM connector. Service and Repair
2. Inspect the following harness for open or short circuit. (Continuity check)
Open circuit
- CMP sensor (RH) terminal A and PCM terminal 2X
- CMP sensor (RH) terminal B and PCM terminal 2C
- CMP sensor (LH) terminal A and PCM terminal 2AB
- CMP sensor (LH) terminal B and PCM terminal 2C
Short circuit
- CMP sensor (RH) terminal A and power supply
- CMP sensor (RH) terminal A and body ground
- CMP sensor (RH) terminal B and power supply
- CMP sensor (LH) terminal A and power supply
- CMP sensor (LH) terminal A and body ground
- CMP sensor (LH) terminal B and power supply
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.