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Camshaft Position Sensor: MPV

Disconnect CMP sensor connector. Check resistance between CMP sensor terminals. If resistance is not 308-376 ohms, replace CMP sensor. If resistance is within specification, disconnect PCM harness connector. Connect 104-Pin Breakout Box (49-UN01-130) to PCM harness connector. See Fig 1 . Leave PCM disconnected. Check continuity of Blue wire between CMP sensor harness connector terminal "A" and breakout box terminal No. 85. Check continuity Yellow wire between CMP sensor harness connector terminal "B" and breakout box terminal No. 86. If continuity is not present, repair open in Blue wire between CMP harness connector terminal "A" and PCM harness connector terminal No. 85 or Yellow wire between CMP harness connector terminal "B" and PCM harness connector terminal No. 86. Check at CMP sensor 2-pin harness connector terminals "A" (Blue wire) or "B" (Yellow wire) for short to power or ground. If short is present, repair or replace wire harness as necessary.

Fig 1: Identifying 104-Pin Break Out Box
G00127421Courtesy of MAZDA MOTORS CORP.