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DTC P0AA1:00 [Mazda M Hybrid BATTERY]

id140204303200

Details On DTCs

Description	Mazda M Hybrid battery internal contactor: Stuck closed
Detection condition	Determination conditions	•  Difference between sum of voltage at each cell(No.1 to No.9) in Mazda M Hybrid battery and measured voltage of overall Mazda M Hybrid battery is higher than 3.05 V.
	Preconditions	•  Mazda M Hybrid battery is any of the following conditions (PID: BECM_STAT) ―  INITIAL ―  STANDBY ―  FAIL •  The following DTCs are not detected: ―  P0A1F:09, P0B3C:00, P0B3D:11, P0B3D:13 and P0B3E:00 •  Mazda M Hybrid battery internal contactor control condition: OFF •  Mazda M Hybrid battery pre-charge control condition: OFF
	Malfunction determination period	•  35 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	•  Integrated starter generator (ISG) malfunction ―  Integrated starter generator (ISG) is stuck closed ―  Integrated starter generator (ISG) internal malfunction •  F14 20 A fuse malfunction (with seat warmer system) •  Malfunction with 30 A fuse installed to DC-DC converter (Mazda M Hybrid) (with seat warmer system) •  DC-DC converter (Mazda M Hybrid) malfunction •  Short to ground in Mazda M Hybrid battery charge/discharge circuit •  Mazda M Hybrid battery malfunction

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

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 INTEGRATED STARTER GENERATOR (ISG) DTC •  Perform the DTC inspection for the integrated starter generator (ISG). (See DTC INSPECTION.) •  Are any of the following DTCs displayed? ―  P0A7A:00 ―  P1BC5:00 ―  P1BC6:00	Yes	If DTC P0A7A:00, P1BC5:00 or P1BC6:00 is a present malfunction: 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 integrated starter generator (ISG) and Mazda M Hybrid battery, then perform the repair completion verification 2. (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.) If DTC P0A7A:00, P1BC5:00 or P1BC6:00 is not a present malfunction: Go to the next step.
		No	Go to Step 4.
3	PERFORM REPLICATION TEST FOR INTEGRATED STARTER GENERATOR (ISG) •  Start the engine. •  Access the following PIDs using the M-MDS: (See PID/DATA MONITOR TABLE [INTEGRATED STARTER GENERATOR (ISG)].) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (E))].) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].) Integrated starter generator (ISG): ―  B-ISG_RPM PCM: ―  ENG_RPM ―  VSS ―  ECT Warning •  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. •  While performing this step, always operate the vehicle in a safe and lawful manner. Note •  Match the engine coolant temperature in the recorded snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle. •  Try to reproduce the malfunction by driving the vehicle for based on the values in the snapshot data. •  Perform the DTC inspection for the integrated starter generator (ISG). (See DTC INSPECTION.) •  Are any of the following DTCs displayed? ―  P0A7A:00 ―  P1BC5:00 ―  P1BC6:00	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 integrated starter generator (ISG) and Mazda M Hybrid battery, then perform the repair completion verification 2. (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		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 2. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
4	VERIFY DC-DC CONVERTER (Mazda M Hybrid) DTC •  Perform the DTC inspection for the DC-DC converter (Mazda M Hybrid). (See DTC INSPECTION.) •  Is DTC U3000:49 displayed?	Yes	If DTC U3000:49 is a present malfunction: 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 DC-DC converter (Mazda M Hybrid) and Mazda M Hybrid battery, then perform the repair completion verification 2. (See DC-DC CONVERTER (Mazda M Hybrid) REMOVAL/INSTALLATION.) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.) If DTC U3000:49 is not a present malfunction: Go to the next step.
		No	Go to the Step 6.
5	VERIFY DC-DC CONVERTER (Mazda M Hybrid) DTC AGAIN •  Perform the DTC inspection for the DC-DC converter (Mazda M Hybrid). (See DTC INSPECTION.) •  Is DTC U3000:49 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 DC-DC converter (Mazda M Hybrid) and Mazda M Hybrid battery, then perform the repair completion verification 2. (See DC-DC CONVERTER (Mazda M Hybrid) REMOVAL/INSTALLATION.) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		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 2. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
6	INSPECT Mazda M Hybrid BATTERY CHARGE/DISCHARGE CIRCUIT FOR SHORT TO GROUND •  Verify that the integrated starter generator (ISG) connector is connected. •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	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 2. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Go to the next step.
7	INTEGRATED STARTER GENERATOR (ISG) INTERNAL CIRCUIT FOR SHORT TO GROUND •  Disconnect the integrated starter generator (ISG) connector. •  Inspect for continuity between integrated starter generator (ISG) terminal 2A (part-side) and body ground. •  Is there continuity?	Yes	Replace the integrated starter generator (ISG) and Mazda M Hybrid battery, then perform the repair completion verification 2. (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Without seat warmer system: •  Go to Step 10. With seat warmer system: •  Go to the next step.
8	INSPECT F14 20 A FUSE •  Remove the F14 20 A fuse. •  Inspect the F14 20 A fuse. •  Is the fuse normal?	Yes	Reinstall the fuse, then go to the next step.
		No	Repair or replace the wiring harness which has a short to ground. Replace the F14 20 A fuse and Mazda M Hybrid battery, then perform the repair completion verification 1. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
9	INSPECT 30 A FUSE INSTALLED TO DC-DC CONVERTER (Mazda M Hybrid) •  Inspect the 30 A fuse installed to the DC-DC converter (Mazda M Hybrid). (See DC-DC CONVERTER (Mazda M Hybrid) REMOVAL/INSTALLATION.) •  Is the fuse normal?	Yes	Reinstall the fuse, then go to the next step.
		No	Repair or replace the wiring harness which has a short to ground. Replace the 30 A fuse and Mazda M Hybrid battery, then perform the repair completion verification 1. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
10	INSPECT DC-DC CONVERTER (Mazda M Hybrid) INTERNAL CIRCUIT FOR SHORT TO GROUND •  Disconnect the DC-DC converter (Mazda M Hybrid) connector. •  Inspect for continuity between DC-DC converter (Mazda M Hybrid) terminal 2A (part-side) and body ground. •  Is there continuity?	Yes	Replace the DC-DC converter (Mazda M Hybrid) and Mazda M Hybrid battery, then perform the repair completion verification 2. (See DC-DC CONVERTER (Mazda M Hybrid) REMOVAL/INSTALLATION.) (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Go to the next step.
11	INSPECT Mazda M Hybrid BATTERY CHARGE/DISCHARGE CIRCUIT FOR SHORT TO GROUND •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Replace the Mazda M Hybrid battery, then perform the repair completion verification 2. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Repair or replace the wiring harness which has a short to ground. Replace the Mazda M Hybrid battery, then perform the repair completion verification 1. (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.) •  Switch the ignition off and wait for 75 s or more. •  Switch the ignition ON (engine off or on). •  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.