Intention of troubleshooting procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Step 1-3
- Verifying malfunction related to DC-DC converter (i-ELOOP) 3A terminal
Step 4-6
- Verifying malfunction related to DC-DC converter (i-ELOOP) 4A terminal
Step 7-8
- Verifying/replacing malfunctioning part
Step 9-10
- Verify that primary malfunction is resolved and there are no other malfunctions.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS Switch the ignition off. Remove the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP] .) Disconnect the connector of the following parts. Generator DC-DC converter (i-ELOOP) Capacitor (i-ELOOP) Inspect for continuity between the following terminals (wiring harness-side) and body ground: Generator terminal 1A Capacitor (i-ELOOP) terminal 2A Capacitor (i-ELOOP) terminal 3A DC-DC converter (i-ELOOP) terminal 3A Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Capacitor (i-ELOOP) terminal 2A- Generator terminal 1A Capacitor (i-ELOOP) terminal 3A-DCDC converter (i-ELOOP) terminal 3A If there is a common connector: 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. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Go to Step 3.
1		No	Go to the next step.
2	PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS Verify that the generator, capacitor (i-ELOOP), and DC-DC converter (i-ELOOP) connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Capacitor (i-ELOOP) terminal 2A- Generator terminal 1A Capacitor (i-ELOOP) terminal 3A-DC-DC converter (i-ELOOP) terminal 3A Is there continuity?	Yes	Go to Step 6.
2		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Capacitor (i-ELOOP) terminal 2A- Generator terminal 1A Capacitor (i-ELOOP) terminal 3A-DCDC converter (i-ELOOP) terminal 3A If there is a common connector: 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. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step.
3	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION Always reconnect all disconnected connectors. Reinstall the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP] .) Start the engine. Is "i-ELOOP charging? Stop the vehicle and wait a minute" displayed in the LCD, and the master warning light illuminated after approx. 3 min?	Yes	NOTE: A fuse is blown in the capacitor (i-ELOOP) due to excess current can be considered. Replace the capacitor (i-ELOOP). (See CAPACITOR (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP] .)Go to Step 9.
3		No	Go to Step 9.
4	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS Switch the ignition off. Remove the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP] .) Disconnect the DC-DC converter (i-ELOOP) connector. Inspect for continuity between the following terminals (wiring harness-side) and body ground: DC-DC converter (i-ELOOP) terminal 4A Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Battery positive terminal-DC-DC converter (i-ELOOP) terminal 4A If there is a common connector: 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. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Replace the DCDC 200 A fuse. Go to Step 9.
4		No	Go to the next step.
5	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION Repelace the DCDC 200 A fuse. Always reconnect all disconnected connectors. Reinstall the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP] .) Start the engine. Inspect the DCDC 200 A fuse. Is the DCDC 200 A fuse blown?	Yes	Replace the DCDC 200 A fuse and DCDC converter (i-ELOOP). (See DC-DC CONVERTER REMOVAL/INSTALLATION [i-ELOOP] .) Go to Step 9.
5		No	Go to Step 9.
6	PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS Switch the ignition off. Remove the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP] .) Disconnect the DC-DC converter (i-ELOOP) connector. Inspect for continuity between the following terminals (wiring harness-side): Battery positive terminal-DCDC converter (i-ELOOP) terminal 4A Is there continuity?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Battery positive terminal-DC-DC converter (i-ELOOP) terminal 4A If there is a common connector: 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. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step.
7	PURPOSE: VERIFY IF MALFUNCTION OCCURRING IS CAUSED BY WIRING HARNESS/CONNECTOR LOSS Have all the wiring harnesses/connectors which can be considered the cause of DTC P0A12:00 been inspected?	Yes	Go to the next step.
7		No	Inspect all the related wiring harnesses/connectors. If there is a malfunction Repair or replace the connector and/or terminals, then go to Step 9. If there is no malfunction Go to the next step.
8	PURPOSE: VERIFY DC-DC CONVERTER (i-ELOOP) REPLACEMENT RECORD Is the DC-DC converter (i-ELOOP) being replaced within the troubleshooting diagnostic procedure this time?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Go to the next step.
8		No	Replace the DC-DC converter (i-ELOOP). (See DC-DC CONVERTER REMOVAL/INSTALLATION [i-ELOOP] .) Go to the next step.
9	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION Always reconnect all disconnected connectors. Reinstall the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP] .) Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .) Implement the repeatability verification procedure. (See Repeatability Verification Procedure .) Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .) Is the same DTC present?	Yes	Repeat the inspection from Step 7.
9		No	Go to the next step.
10	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)
10		No	DTC troubleshooting completed.