{"id":10104,"date":"2017-06-11T23:57:09","date_gmt":"2017-06-11T23:57:09","guid":{"rendered":"http:\/\/mazdaman.x10host.com\/sm355801\/"},"modified":"2017-06-11T23:57:09","modified_gmt":"2017-06-11T23:57:09","slug":"sm355801","status":"publish","type":"page","link":"https:\/\/chroot-me.in\/16ND\/sm355801\/","title":{"rendered":"DTC B1142:13 [ELECTRICAL SUPPLY UNIT (ESU)]"},"content":{"rendered":"
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\n < Previous<\/a> Next ><\/a><\/p>\n

2016 – MX-5 – Body and Accessories<\/h2>\n

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DTC B1142:13 [ELECTRICAL SUPPLY UNIT (ESU)]<\/h3>\n\n\n\n\n\n\n\n
\n

Description<\/b><\/p>\n<\/td>\n

\n

Ignition switch status mismatch<\/p>\n<\/td>\n<\/tr>\n

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Detection condition<\/b><\/p>\n<\/td>\n

\n
    \n
  • \n

    The electrical supply unit (ESU) detects the following mismatches.<\/p>\n<\/li>\n

      \n
    • \n

      Ignition switch status determined from power supply condition in BCM received from BCM via LIN communication<\/p>\n<\/li>\n<\/ul>\n

        \n
      • \n

        Ignition switch status determined from power supply input condition of electrical supply unit (ESU) power supply circuit (IG1)<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<\/td>\n<\/tr>\n

\n

Fail-safe<\/b><\/p>\n<\/td>\n

\n

Not applicable<\/p>\n<\/td>\n<\/tr>\n

\n

Possible cause<\/b><\/p>\n<\/td>\n

\n
    \n
  • \n

    BCM connector or terminal malfunction<\/p>\n<\/li>\n

  • \n

    Electrical supply unit (ESU) connector or terminal malfunction<\/p>\n<\/li>\n

  • \n

    BCM power supply circuit (IG1) malfunction<\/p>\n<\/li>\n

      \n
    • \n

      Short to ground in the wiring harness between METER1 10 A fuse and BCM terminal 3O<\/p>\n<\/li>\n

    • \n

      METER1 10 A fuse malfunction<\/p>\n<\/li>\n

    • \n

      Open circuit in wiring harness between IG1 relay terminal C and BCM terminal 3O<\/p>\n<\/li>\n<\/ul>\n

    • \n

      Electrical supply unit (ESU) power supply circuit (IG1) malfunction<\/p>\n<\/li>\n

        \n
      • \n

        Short to ground in the wiring harness between METER1 10 A fuse and electrical supply unit (ESU) terminal 1H<\/p>\n<\/li>\n

      • \n

        METER1 10 A fuse malfunction<\/p>\n<\/li>\n

      • \n

        Open circuit in wiring harness between IG1 relay terminal C and electrical supply unit (ESU) terminal 1H<\/p>\n<\/li>\n<\/ul>\n

      • \n

        Short to ground in wiring harness between BCM terminal 2Y and electrical supply unit (ESU) terminal 2I<\/p>\n<\/li>\n

      • \n

        Short to power supply in wiring harness between BCM terminal 2Y and electrical supply unit (ESU) terminal 2I<\/p>\n<\/li>\n

      • \n

        Open circuit in wiring harness between BCM terminal 2Y and electrical supply unit (ESU) terminal 2I<\/p>\n<\/li>\n

      • \n

        BCM malfunction<\/p>\n<\/li>\n

      • \n

        Electrical supply unit (ESU) malfunction<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n

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<\/a><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n Diagnostic Procedure<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

Step<\/p>\n<\/td>\n

\n

Inspection<\/p>\n<\/td>\n

\n

Action<\/p>\n<\/td>\n<\/tr>\n

\n

1<\/p>\n<\/td>\n

\n INSPECT BCM CONNECTOR CONDITION<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Repair or replace the connector, then go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

2<\/p>\n<\/td>\n

\n INSPECT ELECTRICAL SUPPLY UNIT (ESU) CONNECTOR CONDITION<\/b><\/p>\n
    \n
  • \n

    Disconnect the electrical supply unit (ESU) connector.<\/p>\n<\/li>\n

  • \n

    Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.<\/p>\n<\/li>\n

  • \n

    Is the connector normal?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n

\n

Yes<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Repair or replace the connector, then go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

3<\/p>\n<\/td>\n

\n VERIFY BCM POWER SUPPLY (IG1) VOLTAGE<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Inspect the METER1 10 A fuse.<\/p>\n

    \n
  • \n

    If the fuse is blown:<\/p>\n<\/li>\n

      \n
    • \n

      Refer to the wiring diagram and verify whether or not there is a common connector between METER1 10 A fuse and BCM terminal 3O.<\/p>\n<\/li>\n

        \n If there is a common connector:<\/b><\/p>\n
      • \n

        Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.<\/p>\n<\/li>\n

      • \n

        Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

          \n If there is no common connector:<\/b><\/p>\n
        • \n

          Repair or replace the wiring harness which has a short to ground.<\/p>\n<\/li>\n

        • \n

          Replace the fuse.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n

        • \n

          If the fuse is damaged:<\/p>\n<\/li>\n

            \n
          • \n

            Replace the fuse.<\/p>\n<\/li>\n<\/ul>\n

          • \n

            If the fuse is normal:<\/p>\n<\/li>\n

              \n
            • \n

              Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and BCM terminal 3O.<\/p>\n<\/li>\n

                \n If there is a common connector:<\/b><\/p>\n
              • \n

                Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.<\/p>\n<\/li>\n

              • \n

                Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

                  \n If there is no common connector:<\/b><\/p>\n
                • \n

                  Repair or replace the wiring harness which has an open circuit.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<\/ul>\n

                  Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

4<\/p>\n<\/td>\n

\n VERIFY ELECTRICAL SUPPLY UNIT (ESU) POWER SUPPLY (IG1) VOLTAGE<\/b><\/p>\n
    \n
  • \n

    Measure the voltage at the electrical supply unit (ESU) terminal 1H (wiring harness-side).<\/p>\n<\/li>\n

  • \n

    Is the voltage B+<\/b>?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n

\n

Yes<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Inspect the METER1 10 A fuse.<\/p>\n

    \n
  • \n

    If the fuse is blown:<\/p>\n<\/li>\n

      \n
    • \n

      Refer to the wiring diagram and verify whether or not there is a common connector between METER1 10 A fuse and electrical supply unit (ESU) terminal 1H.<\/p>\n<\/li>\n

        \n If there is a common connector:<\/b><\/p>\n
      • \n

        Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.<\/p>\n<\/li>\n

      • \n

        Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

          \n If there is no common connector:<\/b><\/p>\n
        • \n

          Repair or replace the wiring harness which has a short to ground.<\/p>\n<\/li>\n

        • \n

          Replace the fuse.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n

        • \n

          If the fuse is damaged:<\/p>\n<\/li>\n

            \n
          • \n

            Replace the fuse.<\/p>\n<\/li>\n<\/ul>\n

          • \n

            If the fuse is normal:<\/p>\n<\/li>\n

              \n
            • \n

              Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and electrical supply unit (ESU) terminal 1H.<\/p>\n<\/li>\n

                \n If there is a common connector:<\/b><\/p>\n
              • \n

                Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.<\/p>\n<\/li>\n

              • \n

                Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

                  \n If there is no common connector:<\/b><\/p>\n
                • \n

                  Repair or replace the wiring harness which has an open circuit.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<\/ul>\n

                  Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

5<\/p>\n<\/td>\n

\n INSPECT LIN COMMUNICATION CIRCUIT BETWEEN BCM AND ELECTRICAL SUPPLY UNIT (ESU) FOR SHORT TO GROUND<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Refer to the wiring diagram and verify whether or not there is a common connector between BCM terminal 2Y and electrical supply unit (ESU) terminal 2I.<\/p>\n

    \n If there is a common connector:<\/b><\/p>\n
  • \n

    Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.<\/p>\n<\/li>\n

  • \n

    Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

      \n If there is no common connector:<\/b><\/p>\n
    • \n

      Repair or replace the wiring harness which has a short to ground.<\/p>\n<\/li>\n<\/ul>\n

      Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

6<\/p>\n<\/td>\n

\n INSPECT LIN COMMUNICATION CIRCUIT BETWEEN BCM AND ELECTRICAL SUPPLY UNIT (ESU) FOR SHORT TO POWER SUPPLY<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Refer to the wiring diagram and verify whether or not there is a common connector between BCM terminal 2Y and electrical supply unit (ESU) terminal 2I.<\/p>\n

    \n If there is a common connector:<\/b><\/p>\n
  • \n

    Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.<\/p>\n<\/li>\n

  • \n

    Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

      \n If there is no common connector:<\/b><\/p>\n
    • \n

      Repair or replace the wiring harness which has a short to power supply.<\/p>\n<\/li>\n<\/ul>\n

      Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

7<\/p>\n<\/td>\n

\n INSPECT LIN COMMUNICATION CIRCUIT BETWEEN BCM AND ELECTRICAL SUPPLY UNIT (ESU) FOR OPEN CIRCUIT<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Refer to the wiring diagram and verify whether or not there is a common connector between BCM terminal 2Y and electrical supply unit (ESU) terminal 2I.<\/p>\n

    \n If there is a common connector:<\/b><\/p>\n
  • \n

    Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.<\/p>\n<\/li>\n

  • \n

    Repair or replace the malfunctioning part.<\/p>\n<\/li>\n<\/ul>\n

      \n If there is no common connector:<\/b><\/p>\n
    • \n

      Repair or replace the wiring harness which has an open circuit.<\/p>\n<\/li>\n<\/ul>\n

      Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n

\n

8<\/p>\n<\/td>\n

\n VERIFY IF MALFUNCTIONING LOCATION IS BCM DEPENDING ON REPEATABILITY<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Replace the BCM, then go to the next step.<\/p>\n

(See BODY CONTROL MODULE (BCM) REMOVAL\/INSTALLATION<\/a>.)<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

Go to Step 10.<\/p>\n<\/td>\n<\/tr>\n

\n

9<\/p>\n<\/td>\n

\n VERIFY THAT REPAIRS HAVE BEEN COMPLETED<\/b><\/p>\n\n

Yes<\/p>\n<\/td>\n

\n

Repeat the inspection from Step 1.<\/p>\n

\n

No<\/p>\n<\/td>\n

\n

Go to the next step.<\/p>\n<\/td>\n<\/tr>\n

\n

10<\/p>\n<\/td>\n

\n VERIFY IF OTHER DTCs DISPLAYED<\/b><\/p>\n
    \n
  • \n

    Are any other DTCs displayed?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n

\n

Yes<\/p>\n<\/td>\n

\n

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.<\/p>\n

(See DTC TABLE [ELECTRICAL SUPPLY UNIT (ESU)]<\/a>.)<\/p>\n<\/td>\n<\/tr>\n

\n

No<\/p>\n<\/td>\n

\n

DTC troubleshooting completed.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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\n \u00a9 2014 Mazda North American Operations, U.S.A.<\/em>\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

< Previous Next > 2016 – MX-5 – Body and Accessories DTC B1142:13 [ELECTRICAL SUPPLY UNIT (ESU)] Description Ignition switch status mismatch Detection condition The electrical supply unit (ESU) detects the following mismatches. Ignition switch status determined from power supply condition in BCM received from BCM via LIN communication Ignition switch status determined from power supply input condition of electrical supply unit (ESU) power supply circuit (IG1) Fail-safe Not applicable Possible cause BCM connector or […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-10104","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/pages\/10104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/comments?post=10104"}],"version-history":[{"count":0,"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/pages\/10104\/revisions"}],"wp:attachment":[{"href":"https:\/\/chroot-me.in\/16ND\/wp-json\/wp\/v2\/media?parent=10104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}