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 P0463 [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 the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT FUEL GAUGE SENDER UNIT CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect fuel gauge sender unit connector. Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). Is there any malfunction?	Yes	Repair suspected terminal, then go to Step 8.
3		No	Go to the next step.
4	CLASSIFY FUEL GAUGE SENDER UNIT OR HARNESS MALFUNCTION Inspect fuel gauge sender unit. (See FUEL GAUGE SENDER UNIT INSPECTION ) Is it normal?	Yes	Repair or replace if necessary, go to Step 8.
4		No	Go to the next step.
5	INSPECT FTL SIGNAL CIRCUIT FOR OPEN CIRCUIT Turn ignition key to ON (Engine off). Measure voltage between fuel gauge sender unit terminal C (harness-side) and body GND. Is voltage above 4.5-5.5 V ?	Yes	Go to Step 8.
5		No	Go to the next step.
6	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 suspected terminal, then go to Step 8.
6		No	Repair or replace open circuit between fuel gauge sender unit terminal C (harness-side) and PCM terminal 4AD (harness-side), then go to Step 8.
7	INSPECT FUEL GAUGE SENDER UNIT GND CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch off. Check continuity between fuel gauge sender unit terminal A (harness-side) and body GND. Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace harness for open circuit, then go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0463 COMPLETED Make sure to connect all disconnected connectors. Turn ignition key to ON (Engine off). Clear the DTC from the PCM memory using the WDS or equivalent. Start the engine. Is same DTC present?	Yes	Replace PCM, then go to the next step.
8		No	Go to the next step.
9	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 )
9		No	Troubleshooting completed.