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 P0102 [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 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 CURRENT INPUT SIGNAL STATUS-IS CONCERN INTERMITTENT OR CONSTANT Connect WDS or equivalent to DLC-2. Clear the DTC from the PCM memory using the WDS or equivalent. Start engine and race it. Access MAF PID using the WDS or equivalent. Is same DTC present?	Yes	Go to the next step.
3		No	Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING )
4	INSPECT MAF SENSOR CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect the MAF sensor connector. Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). Is there any malfunction?	Yes	Repair or replace terminals, then go to Step 10.
4		No	Go to the next step.
5	CHECK POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Turn ignition key to ON (Engine off). Check voltage at MAF sensor terminal C (harness-side). Is voltage B+ ?	Yes	Go to the next step.
5		No	Inspect for open circuit in wiring harness between MAF sensor terminal C (harness-side) and main relay. Repair or replace harness, then go to Step 10.
6	INSPECT MAF SENSOR GND CIRCUIT FOR OPEN CIRCUIT Check for continuity between MAF sensor terminal A (harness-side) and PCM terminal 4A (harness-side). Is there continuity?	Yes	Go to the next step.
6		No	Check for open circuit between PCM terminal 4A (harness-side) and MAF sensor terminal A (harness-side). Repair or replace suspected harness, then go to Step 10.
7	INSPECT POOR CONNECTION OF PCM CONNECTOR Turn the ignition switch off. Disconnect PCM connector. Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). Is there any malfunction?	Yes	Repair terminal, then go to Step 10.
7		No	Go to the next step.
8	INSPECT MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT Disconnect PCM. Check for continuity between MAF sensor terminal B (harness-side) and PCM terminal 4X (harness-side). Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace suspected harness, then go to Step 10.
9	INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT Check continuity between following circuits: MAF sensor terminal B (harness-side) and body GND MAF sensor connector terminal A (harness-side) and B (harness-side) Is there continuity?	Yes	Repair or replace suspected harness, then go to the next step.
9		No	Replace MAF sensor, then go to the next step.
10	VERIFY TROUBLESHOOTING OF DTC P0102 COMPLETED Make sure to connect all disconnected connectors. Clear the DTC from the PCM memory using the WDS or equivalent. Start engine and race it. Is same DTC present?	Yes	Replace PCM, then go to the next step.
10		No	Go to the next step.
11	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 )
11		No	Troubleshooting completed.