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DTC P1793:00 [PCM (SKYACTIV-X)]

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Note

•  To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

Description	Mazda M Hybrid battery: Ignition switch signal malfunction
Detection condition	Determination conditions	•  The PCM detects that the Mazda M Hybrid battery stores the following DTCs. ―  P1793:12 ―  P1793:14
	Preconditions	•  Not applicable
	Malfunction determination period	•  3 s period
	Drive cycle	•  1
	Self test type	•  CMDTC self test
	Sensor used	•  Mazda M Hybrid battery
Fail-safe function	•  Do not activate Mazda M Hybrid the next time the ignition is switched ON (engine off). •  Inhibits engine-stop by operating the i-stop function.
Vehicle status when DTCs are output	•  Not applicable
Possible cause	•  DTCs are stored in the Mazda M Hybrid battery. •  IG1 relay No.1 malfunction •  PCM connector or terminals malfunction •  Short to ground or open circuit in PCM power supply circuit •  Short to power supply in wiring harness between IG1 relay No.1 and PCM •  IG1 relay No.2 malfunction •  Mazda M Hybrid battery connector or terminals malfunction •  Short to ground or open circuit in Mazda M Hybrid battery power supply circuit •  Short to power supply in wiring harness between IG1 relay No.2 and Mazda M Hybrid battery •  Mazda M Hybrid battery malfunction (internal malfunction) •  CAN communication line malfunction between PCM and Mazda M Hybrid battery •  PCM malfunction

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

PID Item/Simulation Item Used In Diagnosis

Function Inspection Using M-MDS

Step	Inspection	Results	Action
1	PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
2	PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
3	PURPOSE: INSPECT FOR OTHER RELATED DTCs •  Perform the DTC inspection for the following modules. (See DTC INSPECTION.) ―  Integrated starter generator (ISG) ―  DC-DC converter (Mazda M Hybrid) •  Are any of the following DTCs displayed? Integrated starter generator (ISG) ―  P1BC9:00 DC-DC converter (Mazda M Hybrid) ―  P1628:62	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
		No	Go to the next step.
4	PURPOSE: VERIFY COMMUNICATION CONDITION WITH Mazda M Hybrid BATTERY •  Perform the vehicle ID using the M-MDS. •  Verify the quick check display (network view). •  Is the Mazda M Hybrid battery displayed in red or blue?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 5.
		No	Go to the next step.
5	PURPOSE: VERIFY Mazda M Hybrid BATTERY DTCs •  Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) •  Are any of the following DTCs displayed? ―  P1793:12 ―  P1793:14	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P1793:12 [Mazda M Hybrid BATTERY].) (See DTC P1793:14 [Mazda M Hybrid BATTERY].)
		No	Go to the next step.
6	PURPOSE: VERIFY Mazda M Hybrid BATTERY DTCs AFTER CLEARING DTCs •  Clear the DTC recorded in the memory. (See CLEARING 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	Intermittent concern exists. •  Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.

Troubleshooting Diagnostic Procedure

―  Perform an inspection of the connectors and wiring harnesses between the battery and the PCM.

―  Perform an inspection of the connectors and wiring harnesses between the battery and the Mazda M Hybrid battery.

―  Perform an inspection of the Mazda M Hybrid battery.

―  Verify that the primary malfunction is resolved and there are no other malfunctions.

Step	Inspection	Results	Action
1	PURPOSE: INSPECT IG1 RELAY No.1 FOR MALFUNCTION •  Inspect the applicable part (See RELAY INSPECTION.) •  Is the part normal?	Yes	Install the relay, then go to the next step. (See RELAY LOCATION [(E)].)
		No	Repair or replace the malfunctioning location then perform the repair completion verification. (See RELAY LOCATION [(E)].)
2	PURPOSE: INSPECT PCM 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 then perform the repair completion verification.
3	PURPOSE: INSPECT PCM POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT •  Inspect the power supply circuit for an open circuit and short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location then perform the repair completion verification.
4	PURPOSE: INSPECT WIRING HARNESS BETWEEN IG1 RELAY No.1 AND PCM FOR SHORT TO POWER SUPPLY •  Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go back to Step 3 of the "Function Inspection Using M-MDS" to perform the procedure again.
		No	Repair or replace the malfunctioning location then perform the repair completion verification.
5	PURPOSE: INSPECT IG1 RELAY No.2 FOR MALFUNCTION •  Inspect the applicable part (See RELAY INSPECTION.) •  Is the part normal?	Yes	Install the relay, then go to the next step. (See RELAY LOCATION [(E)].)
		No	Repair or replace the malfunctioning location then perform the repair completion verification. (See RELAY LOCATION [(E)].)
6	PURPOSE: 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 then perform the repair completion verification.
7	PURPOSE: INSPECT Mazda M Hybrid BATTERY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT •  Inspect the power supply circuit for an open circuit and short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location then perform the repair completion verification.
8	PURPOSE: INSPECT WIRING HARNESS BETWEEN IG1 RELAY No.2 AND Mazda M Hybrid BATTERY FOR SHORT TO POWER SUPPLY •  Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location then perform the repair completion verification.
9	PURPOSE: INSPECT Mazda M Hybrid BATTERY INTERNAL CIRCUIT FOR SHORT TO GROUND •  Inspect for continuity between the Mazda M Hybrid battery terminal 1A (parts-side) and body ground. •  Is there continuity?	Yes	Replace the Mazda M Hybrid battery then perform the repair completion verification. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
		No	Short to power supply in the Mazda M Hybrid battery can be considered the cause of the 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 Mazda M Hybrid battery, then perform the repair completion verification. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
Repair completion verification 1	PURPOSE: 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. ―  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the DTC inspection for the PCM. (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 PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
Repair completion verification 2	PURPOSE: 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.