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DTC P0E10:00 [INTEGRATED STARTER GENERATOR (ISG)]

id140202301500

Outline

System malfunction location	Integrated starter generator (ISG): Power supply voltage decreases
Detection condition	•  Any one of the following conditions is met: ―  PCM sends generation request signal to integrated starter generator (ISG) for 0.1 s ―  Voltage of integrated starter generator (ISG) terminal 2A is 4 V or less for a continuous 0.1 s
Fail-safe	•  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.(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. •  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).
Possible cause	•  Mazda M Hybrid battery malfunction ―  Mazda M Hybrid battery internal fuse malfunction ―  Mazda M Hybrid battery internal relay malfunction •  Connector or terminal malfunction of the following parts: ―  Mazda M Hybrid battery ―  DC-DC converter (Mazda M Hybrid) ―  Integrated starter generator (ISG) •  Open circuit in integrated starter generator (ISG) charge/discharge circuit •  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 integrated starter generator (ISG) charge/discharge circuit •  Integrated starter generator (ISG) malfunction

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	INSPECT INTEGRATED STARTER-GENERATOR (ISG) CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
3	INSPECT INTEGRATED STARTER-GENERATOR (ISG) TERMINAL 2A FOR SHORT TO GROUND •  Switch the ignition off. •  Reconnect all disconnected connectors. •  Inspect for continuity between integrated starter generator (ISG) terminal 2A (wiring harness-side) and body ground. •  Is there continuity?	Yes	Go to Step 13.
		No	Go to the next step.
4	INSPECT FOR OTHER RELATED DTCs •  Perform the DTC inspection for the integrated starter generator (ISG). (See DTC INSPECTION.) •  Are any of the following DTCs displayed? ―  P063C:00	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P063B:00 OR P063C:00 [INTEGRATED STARTER GENERATOR (ISG)].)
		No	Go to the next step.
5	VERIFY Mazda M Hybrid BATTERY DTC •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [Mazda M Hybrid BATTERY].)
		No	Go to the next step.
6	INSPECT Mazda M Hybrid BATTERY CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
7	INSPECT DC-DC CONVERTER (Mazda M Hybrid) CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
8	INSPECT INTEGRATED STARTER-GENERATOR (ISG) CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
9	INSPECT INTEGRATED STARTER-GENERATOR (ISG) CHARGE/DISCHARGE CIRCUIT FOR OPEN CIRCUIT •  Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
10	VERIFY IF INTEGRATED STARTER-GENERATOR (ISG) DOES NOT DETECT STATOR COIL DRIVE CIRCUIT RELATED DTCs •  Switch the ignition off, then ON (engine off). •  Perform the DTC inspection for the integrated starter generator (ISG). (See DTC INSPECTION.) •  Is any of the following DTCs displayed as a present malfunction? ―  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). (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) Go to repair completion verification 2.
		No	Go to the next step.
11	VERIFY WHETHER MALFUNCTION IS PRESENT OR PAST •  Perform the DTC inspection for the integrated starter generator (ISG). (See DTC INSPECTION.) •  Is DTC P0E10:00 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 integrated starter generator (ISG). (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) Go to repair completion verification 2.
		No	Go to the next step.
12	VERIFY INTEGRATED STARTER-GENERATOR (ISG) FOR MALFUNCTION DEPENDING ON REPEATABILITY •  Start the engine. •  Access the following PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.) (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 based on the values in the snapshot data. •  Perform the DTC inspection for the integrated starter generator (ISG). (See DTC INSPECTION.) •  Is DTC P0E10:00 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 integrated starter generator (ISG). (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) Go to repair completion verification 2.
		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.
13	INSPECT 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 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].)
		No	Without seat warmer system: •  Go to Step 16. With seat warmer system: •  Go to the next step.
14	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 malfunctioning location and perform the repair completion verification 1.
15	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 malfunctioning location and perform the repair completion verification 1.
16	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 perform the repair completion verification 1. (See DC-DC CONVERTER (Mazda M Hybrid) REMOVAL/INSTALLATION.)
		No	Go to the next step.
17	INSPECT INTEGRATED STARTER-GENERATOR (ISG) CHARGE/DISCHARGE CIRCUIT FOR SHORT TO GROUND •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
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.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Start the engine. ―  Access the following PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.) (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 based on the values in the snapshot data. •  Perform the DTC inspection for the integrated starter generator (ISG). (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 integrated starter generator (ISG), then go to the next step. (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-G (E)].) (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		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.