DTC U3006:16 [ELECTRIC POWER STEERING (EPS) CONTROL MODULE]

id0602a6015500

Outline

System malfunction location		Ignition power supply
Detection condition		•  Voltage of 8 V or less detected by Electric Power Steering (EPS) control module ignition voltage observation.
Fail-safe		•  Refer to “Fail-safe Function Table”. (See DTC TABLE [ELECTRIC POWER STEERING (EPS) CONTROL MODULE].)
Possible cause		•  DTCs are stored in the following modules. ―  PCM ―  Integrated starter generator (ISG) ―  Mazda M Hybrid battery ―  DC-DC converter (Mazda M Hybrid) •  Battery malfunction •  Integrated starter generator (ISG) malfunction •  IG1 relay No.2 malfunction •  Electric Power Steering (EPS) control module connector or terminal malfunction •  Short to ground or open circuit in Electric Power Steering (EPS) control module power supply circuit •  Open circuit in Electric Power Steering (EPS) control module ground circuit •  Electric Power Steering (EPS) control module malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	VERIFY DTCs •  Perform the DTC inspection for the following modules. (See DTC INSPECTION.) ―  PCM ―  Integrated starter generator (ISG) ―  Mazda M Hybrid battery ―  DC-DC converter (Mazda M Hybrid) •  Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G)].) (See DTC TABLE [INTEGRATED STARTER GENERATOR (ISG)].) (See DTC TABLE [Mazda M Hybrid BATTERY].) (See DTC TABLE [DC-DC CONVERTER (Mazda M Hybrid)].)
		No	Go to the next step.
2	INSPECT BATTERY FOR MALFUNCTION •  Inspect the applicable part. (See BATTERY INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
3	INSPECT INTEGRATED STARTER GENERATOR (ISG) FOR MALFUNCTION •  Inspect the applicable part. (See INTEGRATED STARTER GENERATOR (ISG) INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See INTEGRATED STARTER GENERATOR (ISG) REMOVAL/INSTALLATION.)
4	INSPECT IG1 RELAY No.2 FOR MALFUNCTION •  Inspect the applicable part. (See RELAY INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See RELAY LOCATION.)
5	INSPECT ELECTRIC POWER STEERING (EPS) CONTROL MODULE CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CLEARING DTC.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT ELECTRIC POWER STEERING (EPS) CONTROL MODULE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT •  Inspect the applicable circuit for a short to ground and open circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT ELECTRIC POWER STEERING (EPS) CONTROL MODULE GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT •  Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1	VERIFY DTC TROUBLESHOOTING COMPLETED •  Using the M-MDS, clear the DTC from the Electric Power Steering (EPS) control module. (See CLEARING DTC.) •  Using the M-MDS, perform the Electric Power Steering (EPS) control module DTC inspection. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the Electric Power Steering (EPS) control module. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.) Go to the next step.
		No	Go to the next step.
Repair completion verification 2	VERIFY NO DTC IS PRESENT •  Are any DTCs present?	Yes	Go to applicable DTC inspection. (See DTC TABLE [ELECTRIC POWER STEERING (EPS) CONTROL MODULE].)
		No	DTC troubleshooting completed.