Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.

Verify Related Repair Information Availability - Turn ignition off. Connect scan tool to DLC-2. Turn ignition on, engine off. Monitor for FREEZE FRAME DATA and ensure data has been recorded. Check service bulletins for repair information related to this DTC. If repair information is not available, go to next step. If repair information is available, perform diagnosis and repair as necessary. After repair, go to next step.
Verify CKP Sensor Voltage - Turn ignition off. Disconnect CKP sensor 3-pin harness connector. Check AC voltage between CKP sensor connector terminals while cranking engine. If AC voltage is not present, go to next step. If any AC voltage is present, go to step 4.
Inspect CKP Sensor Resistance - Turn ignition off. Check resistance between CKP sensor 3-pin connector terminals "A" and "B". If resistance is about 550 ohms, check CKP sensor 3-pin harness connector for loose or damaged terminals, poor contact or corrosion. Repair as necessary. After repair, go to step 8. If resistance is not about 550 ohms, replace CKP sensor. After repair, go to step 8.
Inspect PCM Connector For Poor Connection - Turn ignition off. Disconnect PCM 104-pin harness connector. Check for poor connection due to damaged, pulled-out terminals, corrosion, etc. If no problem is found, go to next step. If any problem is found, repair as necessary. After repair, go to step 8.
Inspect CKP Circuit For Open Circuit - Disconnect CKP sensor 3-pin harness connector. Check continuity of Yellow wire between CKP sensor 3-pin harness connector terminal "A" and PCM 104-pin harness connector terminal No. 21. Check continuity of Orange/Black wire between CKP sensor 3-pin harness connector terminal "B" and PCM 104-pin harness connector terminal No. 22. See Fig 1. If continuity is present, go to next step. If continuity is not present, repair or replace suspect wire harness for open circuit. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. After repair, go to step 8.

Fig 1: Identifying Crankshaft Position (CKP) Sensor 3-pin Harness Connector
Courtesy of MAZDA MOTORS CORP.
Inspect CKP Circuit For Short To Ground - Check continuity between ground and CKP sensor 3-pin harness connector terminals "A" (Yellow wire) and "B" (Orange/Black wire). If continuity is not present, go to next step. If continuity is present, repair or replace suspected wire harness for short circuit to ground. After repair, go to step 8.
Inspect CKP Circuits For Intermediate Short - Check continuity between CKP sensor 3-pin harness connector terminals "A" and "B". If continuity is not present, go to next step. If continuity is present, repair or replace suspected wire harness for short between circuits. After repair, go to next step.
Verify Trouble Shooting Of DTC P0335 Completed - Reconnect all connectors. Turn ignition on, engine off. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. Start engine. Ensure MAF PID is more that 2.2 grams/sec. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. If DTC P0335 is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article. After repair, go to next step. If same DTC P0335 is not present, go to next step.
Verify After Repair Procedure - Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If no other DTCs are present, testing is complete. If any other DTC is present, follow appropriate DTC diagnostic procedure. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .