Crankshaft Position Sensor Resistance - Protege & Protege5
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.
- Disconnect Crankshaft Position (CKP) sensor 3-pin harness connector. Using DVOM, measure resistance between terminals "A" and "B". See Fig 1. Resistance reading should be about 550 ohms. If resistance reading is as specified but PID value is out of specification, go to next step. If resistance reading is not as specified, replace CKP sensor. See CRANKSHAFT POSITION SENSOR under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION article.
- Open Circuit Inspection
Disconnect PCM 104-pin harness connector. Connect 104-Pin Breakout Box (49-UN01-130) to PCM harness connector only. Using DVOM, check for continuity in following circuits:- CKP signal circuit between CKP sensor 3-pin harness connector terminal "A" (Yellow wire) and breakout box terminal No. 21.
- CKP signal circuit between CKP sensor 3-pin harness connector terminal "B" (Orange/Black wire) and breakout box terminal No. 22.
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. If open circuit is not present, replace CKP sensor.
- Short Circuit Inspection
Check for continuity between following:- CKP signal circuit between CKP sensor 3-pin harness connector terminal "A" (Yellow wire) and breakout box terminal No. 21 to ground.
- CKP signal circuit between CKP sensor 3-pin harness connector terminal "B" (Orange/Black wire) and breakout box terminal No. 22 to ground.
If continuity is present, repair short in suspect circuit or replace wire harness. If short circuit is not present, replace CKP sensor.