Details On DTCs

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DESCRIPTION	Capacitor system: Capacitor malfunction
DETECTION CONDITION	Determination conditions	Capacitor malfunction determined When any of the following conditions is met: Capacitor internal resistance exceeds the specified value. Capacitor capacitance exceeds the specified value. Capacitor input voltage exceeds the specified value. Capacitor deterioration determined When any of the following conditions is met: Capacitor internal resistance exceeds the specified value. Capacitor capacitance decreases below the specified value. Over-charge determined Capacitor input voltage exceeds the specified value.
	Preconditions	Not applicable.
	Drive cycle	1
	Self test type	CMDTC self test
	Sensor used	DC-DC converter (i-ELOOP)
FAIL-SAFE FUNCTION	Inhibits the i-ELOOP control.
VEHICLE STATUS WHEN DTCs ARE OUTPUT	The following vehicle conditions differ depending on the malfunction conditions. Master warning light is turned on (illumination during bypass mode by i-ELOOP) Charging system warning light is turned on (illumination while generator output is inhibited) The pre-charge warning is displayed after the engine is started.
POSSIBLE CAUSE	Engagement malfunction in capacitor, DC-DC converter (i-ELOOP) Blown capacitor fuse Capacitor malfunction Related wiring harnesses malfunction Capacitor deterioration Generator overcharge (in this case, PCM detects DTC P2504:00) DC-DC converter (i-ELOOP) malfunction PCM malfunction