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Home >> Mazda >> 2016 >> 6 Grand Touring >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic (3 Of 4) >> DTC P1794-00: Capacitor System (Capacitor Malfunction) >> Function Inspection Using M-MDS

Function Inspection Using M-MDS

STEP INSPECTION RESULTS ACTION
1 PURPOSE: VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
2 PURPOSE: VERIFY IF POWER SUPPLY IS AFFECTED BY DTC RELATED TO DC-DC CONVERTER (i-ELOOP) 
  • Switch the ignition off, then ON (engine off).
  • Perform the DC-DC converter (i-ELOOP) DTC inspection using the M-MDS.

    (See DTC INSPECTION [I-ELOOP] .)

  • Are any DTCs present?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [I-ELOOP] .)
No Go to the next step.
3 PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY DTC RELATED TO GENERATOR OVERCHARGE  Yes Go to the applicable PENDING CODE or DTC inspection.
(See DTC P2504:00 [SKYACTIV-G 2.5] .)
No Go to the next step.
4 PURPOSE: DETERMINE IF THE MALFUNCTION IS CAUSED BY CAPACITOR (i-ELOOP) BY VERIFYING THE PID RELATED TO THE CAPACITOR (i-ELOOP) 
  • Access the following PIDs using the M-MDS

    (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .)

    • CAP_SYS_10
    • CAP_SYS 13
    • CAP_SYS 14
    • CAP_SYS 15
    • CAP_SYS 16
  • Are all of the PID item "CAP_SYS_10, CAP_SYS 13, CAP_SYS 14, CAP_SYS 15, CAP_SYS 16" values off?
 Yes
NOTE:
  • If excessive voltage is applied to the capacitor (i-ELOOP), all the PIDs displayed in Step 4 indicate "Off", and the PCM determines a capacitor (i-ELOOP) malfunction and stores DTC P1794:00.
Replace the capacitor (i-ELOOP).(See CAPACITOR (I-ELOOP) REMOVAL/INSTALLATION [I-ELOOP] .)Go to the troubleshooting procedure to perform the procedure from Step 2.
No Go to the next step.
5 PURPOSE: DETERMINE IF THE MALFUNCTION IS CAUSED BY CAPACITOR (i-ELOOP) BY VERIFYING THE PID RELATED TO THE CAPACITOR (i-ELOOP) 
  • Are all of the PID item "CAP_SYS_10, CAP_SYS 13" values on?
 Yes Replace the capacitor (i-ELOOP).
(See CAPACITOR (I-ELOOP) REMOVAL/INSTALLATION [I-ELOOP] .)
Go to the troubleshooting procedure to perform the procedure from Step 2.
No Go to the troubleshooting procedure to perform the procedure from Step 1.
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