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
- Perform a unit inspection of the battery.
Step 2-5
- Perform the inspection for each power supply line.
Step 6-7
- Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: DETERMINE INTEGRITY OF BATTERY Inspect the battery. (See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the battery, then go to Step 6. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
1		No	Go to the next step.
2	PURPOSE: VERIFY IF CONNECTOR DAMAGE OF EACH PART 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. Battery Current sensor PCM Capacitor (i-ELOOP) DC-DC converter (i-ELOOP) Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 6.
2		No	Go to the next step.
3	PURPOSE: INSPECT FUSE Remove the following fuses: C/U IG1 15 A fuse Inspect the following fuses: C/U IG1 15 A fuse Are all the fuses normal?	Yes	Install all the removed fuses, then go to the next step.
3		No	If the fuse is blown: Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and DC-DC converter (i-ELOOP) terminal 1H. 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 malfunctioning fuse. If the fuse is damaged: Replace the malfunctioning fuse. Go to Step 6.
4	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS Verify that the battery, current sensor, PCM, capacitor (i-ELOOP), and DC-DC converter (i-ELOOP) connectors are disconnected. Remove the IG1 relay. Inspect for continuity between the following terminals (wiring harness-side) and body ground: IG1 relay terminal C 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: IG1 relay terminal C-DC-DC converter (i-ELOOP) terminal 1H DC-DC converter (i-ELOOP) terminal 3A-Capacitor (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 6.
4		No	Go to the next step.
5	PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS IG1 relay is removed. Verify that the battery, current sensor, PCM, capacitor (i-ELOOP), and DC-DC converter (i-ELOOP) connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): IG1 relay terminal C-DC-DC converter (i-ELOOP) terminal 1H DC-DC converter (i-ELOOP) terminal 3A-Capacitor (i-ELOOP) terminal 3A Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: IG1 relay terminal C-DC-DC converter (i-ELOOP) terminal 1H DC-DC converter (i-ELOOP) terminal 3A-Capacitor (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.
6	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 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Go to the next step.
6		No	Go to the next step.
7	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)] .)
7		No	DTC troubleshooting completed.