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 CMP SENSOR VOLTAGE Switch the ignition to off. Disconnect the CMP sensor connector. Connect a voltmeter between CMP sensor terminals B and C (sensor-side). Inspect the voltage in AC range while cranking the engine. Is there any voltage?	Yes	Go to the next step.
3		No	Go to step 14
4	INSPECT CMP 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 15.
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 15.
5		No	Go to the next step.
6	INSPECT CMP SENSOR CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground: CMP sensor terminal C (wiring harness-side) CMP sensor 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 15.
6		No	Go to the next step.
7	INSPECT CMP SENSOR CIRCUITS FOR SHORT EACH OTHER Inspect for continuity between CMP sensor terminals B and C (wiring harness-side). Is there continuity?	Yes	Repair or replace the malfunctioning wiring harness, then go to Step 15.
7		No	Go to the next step.
8	INSPECT CMP SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY Switch the ignition to ON (engine off). Measure the voltage between the CMP 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 15.
8		No	Go to the next step.
9	INSPECT CMP SENSOR CIRCUIT FOR OPEN CIRCUIT Switch the ignition to off. Inspect for continuity between the following terminals. CMP sensor terminal C (wiring harness-side) and PCM terminal 2AM (wiring harness-side) CMP sensor terminal B (wiring harness-side) and PCM terminal 2S (wiring harness-side) CMP sensor terminal A (wiring harness-side) and body ground Is there continuity?	Yes	Go to the next step
9		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 15.
10	INSPECT CKP SENSOR CONNECTOR CONDITION Disconnect the CKP sensor 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 15
10		No	Go to the next step.
11	VERIFY VALVE TIMING MECHANISM INSTALLATION Verify the valve timing mechanism installation for the following parts: Timing chain Camshaft sprocket lock bolt Crankshaft pulley lock bolt Is there any malfunction?	Yes	Reinstall the misinstallation or loose parts correctly, then go to Step 15. (See VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [L5] .) (See TIMING CHAIN REMOVAL/INSTALLATION [L5] .)
11		No	Go to the next step
12	INSPECT STOPPER PIN MECHANISM Remove the timing chain. Inspect the stopper pin (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the variable valve timing actuator, then go to Step 15. (See VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [L5] .)
12		No	Go to the next step.
13	INSPECT ROTOR POSITION Remove the variable valve timing actuator (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [L5] .) Is the rotor at the maximum valve timing advanced position?	Yes	Reinstall or replace the variable valve timing actuator, then go to Step 15. (See VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [L5] .)
13		No	VARIABLE VALVE TIMING MECHANISM IS NORMAL NOTE: This DTC is detected as an intermittent concern. The intermittent concern might be removed by cleaning the variable valve timing mode control function. Go to Step 15
14	INSPECT CMP SENSOR Inspect the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the CMP sensor, then go to the next step. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L5] .)
14		No	Go to the next step.
15	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Switch the ignition to ON (engine off) 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] .)
15		No	Go to the next step
16	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] .)
16		No	DTC troubleshooting completed.