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DTC P0AC1:00 OR P0AC2:00 [Mazda M Hybrid BATTERY]

id140204303600

Details On DTCs

Description	P0AC1:00: Mazda M Hybrid battery (current sensor): Low input P0AC2:00: Mazda M Hybrid battery (current sensor): High input
Detection condition	Determination conditions	P0AC1:00 •  The measured value of the current sensor in the Mazda M Hybrid battery is less than -670 A.
		P0AC2:00 •  The measured value of the current sensor in the Mazda M Hybrid battery is more than 420 A.
	Preconditions	•  Mazda M Hybrid battery is any of the following conditions (PID: BECM_STAT) ―  INITIAL ―  STANDBY ―  PRECHARGE ―  READY •  The following DTC is not detected: ―  P0A1F:96
	Malfunction determination period	•  3 s period
	Drive cycle	•  1
	Self test type	•  CMDTC self test, ODDTC self test
	Sensor used	•  Mazda M Hybrid battery
Fail-safe function	•  The integrated starter generator (ISG) only generates power required for power supply to the 12 V system. •  Inhibits the i-stop control. •  Inhibits the non-power generation control. •  Inhibits regenerative braking by the integrated starter generator (ISG). •  Inhibits motor assist control by the integrated starter generator (ISG).
Vehicle status when DTCs are output	•  Inhibits the i-stop control.
Possible cause	•  Mazda M Hybrid battery malfunction

System Wiring Diagram

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

PID Item/Simulation Item Used In Diagnosis

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY WHETHER MALFUNCTION IS PRESENT OR PAST •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Is DTC P0AC1:00 or P0AC2:00 a present malfunction?	Yes	Go to the next step.
		No	Go to Step 4.
3	VERIFY Mazda M Hybrid BATTERY DTC AGAIN •  Switch the ignition off. •  Switch the ignition ON (engine off or on) and wait for 10 s or more. •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Is DTC P0AC1:00 or P0AC2:00 a present malfunction?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the Mazda M Hybrid battery and perform the repair completion verification. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Go to the next step.
4	INSPECT Mazda M Hybrid BATTERY FOR MALFUNCTION DEPENDING ON REPEATABILITY •  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Is DTC P0AC1:00 or P0AC2:00 a present malfunction?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the Mazda M Hybrid battery and perform the repair completion verification. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	The system is normal. (Explain to the customer that a DTC may be displayed when large vibration is applied in the upward/downward direction such as when driving over an uneven road.) Go to the next step.
Repair completion verification	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.