Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0328 [BP, BP WITH TC] DIAGNOSTIC PROCEDURE

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 Check for related Service Bulletins and/or online repair information availability. Is any related repair Information available?	Yes	Perform repair or diagnosis according to available repair Information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	CHECK KNOCK SIGNAL CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch off. Disconnect KS connector. Turn ignition key ON (Engine off). Measure voltage between KS terminal A (harness-side) and body GND? Is voltage approx.5 V ?	Yes	Go to Step 4.
3		No	Go to the next step.
4	CHECK PCM CONNECTOR Disconnect PCM connector. Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 5.
4		No	Repair or replace harness for open circuit, then go to Step 5.
5	CHECK KS Measure resistance between KS terminal A (part-side) and sensor body. Is resistance approx.560 kilohms ?	Yes	Go to the next step.
5		No	Replace KS, then go to the next step.
6	VERIFY TROUBLESHOOTING OF DTC P0328 COMPLETED Make sure to connect all disconnected connectors. Clear the DTC from the PCM memory using the WDS or equivalent. Start engine. Is same DTC present?	Yes	Replace PCM, then go to the next step.
6		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE ". (See AFTER REPAIR PROCEDURE ) Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE )
7		No	Troubleshooting completed.