Camshaft Position Sensor (626 2.0L)

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Mazda Tribute, 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, and 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect Camshaft Position (CMP) sensor harness connector. CMP sensor connector is located on timing belt cover, at upper front of engine. Using ohmmeter, measure resistance between CMP sensor terminals. Resistance should be 950-1250 ohms. If resistance reading is not as specified, replace CMP sensor. If CMP sensor is okay, disconnect PCM harness connector and check for open or short circuit in wiring harness between following:

CMP sensor terminal and PCM harness connector terminal No. 87 (Blue wire).
CMP sensor terminal and PCM harness connector terminal No. 85 (Pink wire).

Repair or replace wiring harness as necessary.