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DTC P0A7E:4B OR P0A7E:98 [Mazda M Hybrid BATTERY]

id140204303000

Details On DTCs

Description	P0A7E:4B: Mazda M Hybrid battery (temperature sensor No.1): High temperature malfunction P0A7E:98: Mazda M Hybrid battery (temperature sensor No.2): High temperature malfunction
Detection condition	Determination conditions	P0A7E:4B •  The measured value of temperature sensor No.1 in the Mazda M Hybrid battery is higher than 95 °C {203 °F}.
		P0A7E:98 •  The measured value of temperature sensor No.2 in the Mazda M Hybrid battery is higher than 95 °C {203 °F}.
	Preconditions	•  Mazda M Hybrid battery is the following condition (PID: BECM_STAT) ―  INITIAL ―  STANDBY ―  PRECHARGE ―  READY •  The following DTCs are not detected: ―  P0A9D:00, P0A9E:00, P0AC7:00 and P0AC8:00
	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	•  Stops power supply from the Mazda M Hybrid battery and supplies power to the vehicle’s electrical devices (12 V power supply) from the 12 V battery. •  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	•  If the vehicle continues to be driven while the DTC is detected, the 12 V battery will be depleted and the vehicle can no longer be driven. •  Inhibits the i-stop control.
Possible cause	•  Charging system malfunction ―  PCM malfunction ―  DC-DC converter (Mazda M Hybrid) malfunction ―  Integrated starter generator (ISG) malfunction •  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 OTHER Mazda M Hybrid BATTERY DTC •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Is DTC P0AA1:00 or P0DE6:00 displayed?	Yes	If P0AA1:00 is displayed •  Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P0AA1:00 [Mazda M Hybrid BATTERY].) If P0DE6:00 is displayed •  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, replace the Mazda M Hybrid battery and perform the repair completion verification 2. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Go to the next step.
3	DETERMINE IF MALFUNCTION CAUSE IS OTHER Mazda M Hybrid RELATED PARTS •  Access the following snapshot data using the M-MDS: (See SNAPSHOT DATA TABLE [Mazda M Hybrid BATTERY].) Mazda M Hybrid battery: ―  CONTACTOR_STAT •  Is the snapshot data CONTACTOR_STAT monitor value CLOSE?	Yes	Go to the next step.
		No	•  Verify if an increase in the temperature of the Mazda M Hybrid battery is caused by an external factor. ―  Exhaust system malfunction ―  Improper storage method of vehicle ―  Increase in temperature due to fire or accident ―  Other factors or increase in temperature due to heat from outside of vehicle Note •  Even if a temperature increase is due to an external factor and the Mazda M Hybrid battery exceeds 95 °C {203 °F}only once, the Mazda M Hybrid battery must be replaced because the part cannot be guaranteed due to declining performance. •  If the malfunction recurs, replace the Mazda M Hybrid battery then perform the repair completion verification 2. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
4	DETERMINE IF MALFUNCTION IS PCM •  Access the following snapshot data using the M-MDS: (See SNAPSHOT DATA TABLE [Mazda M Hybrid BATTERY].) Mazda M Hybrid battery: ―  CONTACTOR_REQ •  Is the snapshot data CONTACTOR_REQ monitor value CLOSE?	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 PCM and Mazda M Hybrid battery, then perform the repair completion verification 2. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Go to the next step.
5	VERIFY DTCs •  Perform the DTC inspection for the following modules. (See DTC INSPECTION.) ―  PCM ―  DC-DC converter (Mazda M Hybrid) ―  Integrated starter generator (ISG) •  Are any DTCs displayed?	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. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.) Repair the malfunctioning location according to the applicable DTC troubleshooting 2. (See DTC TABLE [PCM (SKYACTIV-G (E))].) (See DTC TABLE [PCM (SKYACTIV-X)].) (See DTC TABLE [DC-DC CONVERTER (Mazda M Hybrid)].) (See DTC TABLE [INTEGRATED STARTER GENERATOR (ISG)].)
		No	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.)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Is the same Pending DTC present?	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, then go to the next step. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Go to the next step.
Repair completion verification 2	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.