Camshaft Position Sensor - MAZDA6 (2.3L)
WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
When foreign material such as an iron chip is on Camshaft Position (CMP) sensor, it can cause abnormal output from sensor because of flux turbulence and will adversely affect engine control. Be sure there is no foreign material on CMP sensor when replacing.
- Resistance Inspection
Disconnect CMP sensor harness connector. Measure resistance between CMP sensor terminals "A" and "B" using a DVOM. If CMP sensor resistance reading is 400-550 ohms, go to next step. If resistance reading is not as specified, replace CMP sensor. See CAMSHAFT POSITION SENSOR under ENGINE SENSORS & SWITCHES in REMOVAL OVERHAUL & INSTALLATION article. - Open Circuit Inspection
Disconnect PCM 30-pin harness connector. Check continuity between following terminals:- CMP sensor harness connector terminal "A" (Brown/White wire) and PCM 30-pin harness connector terminal No. 2M (White wire).
- CMP sensor harness connector terminal "B" (White/Violet wire) and PCM 30-pin harness connector terminal No. 2J (Black wire).
If continuity is present, go to next step. If continuity is not present, repair open circuit in suspect wire or replace wire harness. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS.
- Short Circuit Inspection
Check for continuity between following:- CMP sensor harness connector terminal "A" (Brown/White wire) and power supply.
- CMP sensor harness connector terminal "A" (Brown/White wire) and body GND.
- CMP sensor harness connector terminal "B" (White/Violet wire) and power supply.
- CMP sensor harness connector terminal "B" (White/Violet wire) and body GND.
If continuity is present, repair short circuit in suspect wire or replace wire harness.