Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on repair order, then go to the next step
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY CKP SENSOR VOLTAGE Switch the ignition to off Disconnect the CKP sensor connector Connect the voltmeter between the CKP sensor terminals B and C (sensor-side) Inspect the voltage in the AC range while cranking the engine Is there any voltage?	Yes	Go to the next step.
3		No	Go to step 10.
4	INSPECT CKP SENSOR CONNECTOR CONDITION Switch the ignition to off Inspect for poor connection (such as damaged/pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 11.
4		No	Go to the next step
5	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector Inspect for poor connection (such as damaged/pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 11
5		No	Go to the next step.
6	INSPECT CKP SENSOR CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground CKP sensor connector terminal C (wiring harness-side) CKP sensor connector terminal B (wiring harness-side) Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 11.
6		No	Go to the next step.
7	INSPECT CKP SENSOR CIRCUITS FOR SHORT EACH OTHER Inspect for continuity between CKP sensor terminals B and C (wiring harness-side) Is there continuity?	Yes	Repair or replace the malfunctioning wiring harness, then go to Step 11.
7		No	Go to the next step.
8	INSPECT CKP SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY Switch the ignition to ON (engine off). Measure the voltage between CKP sensor terminal B (wiring harness-side) and body ground Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 11
8		No	Go to the next step.
9	INSPECT CKP CIRCUIT FOR OPEN CIRCUIT Switch the ignition to off Inspect for continuity between the following terminals CKP sensor terminal C (wiring harness-side) and PCM terminal 2AQ CKP sensor terminal B (wiring harness-side) and PCM terminal 2W (wiring harness-side) CKP sensor terminal A (wiring harness-side) and body ground Is there continuity?	Yes	Go to Step 11.
9		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 11
10	INSPECT CKP SENSOR Switch the ignition to off Inspect the CKP sensor (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the CKP sensor, then go to the next step. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L5] .)
10		No	Go to the next step
11	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. Start the engine and warm it up completely. Access the MAF PID using the M-MDS. NOTE: The MAF PID should indicate 1.95 g/s {0.25 lb/min} or above during this test Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L5] .)
11		No	Go to the next step
12	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
12		No	DTC troubleshooting completed.