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Camshaft Position Sensor - MAZDA6 (3.0L)

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: Do not forcefully pull wire harness of Camshaft Position (CMP) sensor. Doing so will break harness.
CAUTION: When foreign material such as an iron chip is on 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.
  1. Disconnect negative battery cable. Disconnect appropriate CMP sensor harness connector (left or right sensor). Measure resistance between CMP sensor terminals "A" and "B" with DVOM. If CMP sensor resistance reading is 467-571 ohms but PID value is out of specification, 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.

  2. Open Circuit Inspection

    Disconnect PCM 104-pin harness connector. Check for continuity between following terminals:
    • CMP sensor (RH) harness connector terminal "A" (White/Black wire) and PCM 104-pin harness connector terminal No. 85 (Black wire).
    • CMP sensor (RH) harness connector terminal "B" (Brown/Yellow wire) and PCM 104-pin harness connector terminal No. 86 (White wire).
    • CMP sensor (LH) harness connector terminal "A" (White/Green wire) and PCM 104-pin harness connector terminal No. 58 (Brown wire).
    • CMP sensor (LH) harness connector terminal "B" (Brown/White wire) and PCM 104-pin harness connector terminal No. 59 (Yellow 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.

  3. Short Circuit Inspection

    Check for continuity between following:
    • Between CMP sensor (RH) harness connector terminal "A" (White/Black wire) and power supply.
    • Between CMP sensor (RH) harness connector terminal "A" (White/Black wire) and body ground.
    • Between CMP sensor (RH) harness connector terminal "B" (Brown/Yellow wire) and power supply.
    • Between CMP sensor (RH) harness connector terminal "B" (Brown/Yellow wire) and body ground.
    • Between CMP sensor (LH) harness connector terminal "A" (White/Green wire) and power supply.
    • Between CMP sensor (LH) harness connector terminal "A" (White/Green wire) and body ground.
    • Between CMP sensor (LH) harness connector terminal "B" (Brown/White wire) and power supply.
    • Between CMP sensor (LH) harness connector terminal "B" (Brown/White wire) and body ground.

If continuity is present, repair short circuit in suspect wire or replace wire harness.

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