Diagnostic 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.

DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT BATTERY VOLTAGE Is the battery terminal voltage normal? (See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)	Yes	Make sure that battery terminal connection is okay. Go to the next step.
1		No	Charge or replace the battery, then go to Step 6. (See BATTERY RECHARGING [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
2	INSPECT BATTERY GRAVITY Is the battery specific gravity as specified? (See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)	Yes	Go to the next step.
2		No	Replace the battery, then go to Step 6. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
3	INSPECT CHARGING SYSTEM Are the generator and drive belt tension normal? (See GENERATOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)] .) (See GENERATOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)] .) (See DRIVE BELT INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)	Yes	Go to the next step.
3		No	Replace the generator and/or drive belt if necessary. Go to step 6. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)] .) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)] .) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
4	INSPECT FUSE CONDITION Is the fuse (EPS 60A) normal?	Yes	Go to the next step.
4	INSPECT FUSE CONDITION Is the fuse (EPS 60A) normal?	No	Replace the fuse, then go to Step 7.
5	INSPECT EPS CM POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT Start the engine. Measure the voltage between following EPS CM terminal (wiring harness-side) and ground. EPS CM: 1B-ground Is the voltage 8 V or more?	Yes	Go to the next Step.
5		No	Repair or replace the wiring harness (including fuse) between the EPS CM and ground, then go to Step 6.
6	INSPECT EPS CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT Switch the ignition OFF. Inspect for continuity between EPS control module terminal 1A and body ground. Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness between terminal 1A and body ground, then go to the next step.
7	VERIFY THAT THE SAME DTC IS NOT PRESENT Make sure to reconnect all disconnected connectors. Clear the DTC from the memory. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS .) Is the same DTC present?	Yes	Replace the steering column, then go to the next step. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION .)
7		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCS ARE PRESENT Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS .)
8		No	DTC troubleshooting completed.