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 P0462 [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 TERMINAL FOR BENT Turn the ignition switch off. Disconnect fuel gauge sender unit connector. Check for bent terminal. Is there any malfunction?	Yes	Repair suspected terminal, then go to Step 7.
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 7.
4		No	Go to the next step.
5	INSPECT FUEL LEVEL SIGNAL CIRCUIT FOR SHORT TO GND Turn the ignition switch off. Disconnect PCM connector. Check continuity between fuel gauge sender unit terminal C (harness-side) and body GND. Is there continuity?	Yes	Repair or replace suspected harness, then go to Step 7.
5		No	Go to the next step.
6	INSPECT FUEL GAUGE SENDER UNIT CIRCUITS FOR SHORT CIRCUIT Check continuity between fuel gauge sender unit terminals A and C (harness-side). Is there continuity?	Yes	Repair or replace suspected harness, then go to Step 7.
6		No	Go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P0462 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.
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE ". (See AFTER REPAIR PROCEDURE ) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE )
8		No	Troubleshooting completed.