DTC P2502-00; Generator System Malfunction: Notes

NOTE:

• To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION	Generator system: Malfunction in voltage generated by generator
DETECTION CONDITION	Determination conditions	The voltage generated by the generator is 17 V or higher and the battery voltage is 11 V or less for a continuous specified time.
	Preconditions	While engine is running
	Malfunction determination period	5 s period
	Drive cycle	1
	Self test type	CMDTC self test
	Sensor used	PCM Generator
FAIL-SAFE FUNCTION	Generator control is inhibited.
VEHICLE STATUS WHEN DTCs ARE OUTPUT	A warning message is displayed in the display. Illuminates charging system warning light. If the vehicle continues to be driven while the DTC is detected the battery will be depleted. A malfunction occurs with an electrical device and the vehicle stops. The following vehicle conditions differ depending on the type of malfunction: Vehicle shock may occur due to generator load. Idling feel due to generator-stop may occur.
POSSIBLE CAUSE	Poor connection of the following parts: Battery Generator PCM Connector or terminal malfunction of the following parts: Battery Generator PCM Short to ground or open circuit in generator charge/discharge circuit Short to ground in wiring harness between battery positive terminal and generator terminal 1A STR 200 A fuse malfunction Open circuit in wiring harness between battery positive terminal and generator terminal 1A Generator malfunction Battery malfunction PCM malfunction

System Wiring Diagram

Fig 1: Generator Circuit Diagram

Courtesy of MAZDA MOTORS CORP.