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DTC P0B3D:11 OR P0B3D:13 [Mazda M Hybrid BATTERY]

id140204310200

Details On DTCs

Description	P0B3D:11: Mazda M Hybrid battery (cell voltage sensor): Low input (open or short circuit between circuits) P0B3D:13: Mazda M Hybrid battery (cell voltage sensor): Low input (open circuit)
Detection condition	Determination conditions	P0B3D:11 •  Any one of the following conditions is met: ―  Difference between sum of voltage at each cell (No.1—No.9) and the total voltage monitor is more than 0.6 V with the voltage at each cell (No.1—No.9) in the Mazda M Hybrid battery of less than 0.5 V. ―  Difference between the voltage of the cell with highest voltage output and the voltage of the cell with lowest voltage output of each cell (No.1—No.9) in the Mazda M Hybrid battery is more than 3 V.
		P0B3D:13 •  The difference between the measured values of the voltage of the cell detected by the cell voltage sensor in the Mazda M Hybrid battery and the voltage of the cell detected after the specified time has elapsed is more than 0.5 V.
	Preconditions	•  Mazda M Hybrid battery is any of the following conditions (PID: BECM_STAT) ―  INITIAL ―  STANDBY ―  PRECHARGE ―  READY •  The following DTCs are not detected: ―  P1B04:33, P1B04:81, P0ABC:00 and P0ABD:00
	Malfunction determination period	P0B3D:11 •  3 s period P0B3D:13 •  0.1 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 •  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

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 P0B3D:11 or P0B3D:13 a present malfunction?	Yes	Go to Step 4.
		No	Go to the next step.
3	PERFORM REPLICATION TEST •  Switch the ignition ON (engine off or on). •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Is DTC P0B3D:11 or P0B3D:13 a present malfunction?	Yes	Go to the next step.
		No	The system is normal. (Explain to the customer that a malfunction was detected temporarily, but the vehicle is currently normal.) Go to repair completion verification 2.
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	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC U3000:49 [DC-DC CONVERTER (Mazda M Hybrid)].)
		No	Go to the next step.
5	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 8. With seat warmer system: •  Go to the next step.
6	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.)
7	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.)
8	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.
9	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.) •  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.