DTC U3003:16 [PARKING LOCK ACTUATOR]

id0502z4587900

Outline

System malfunction location	Power supply (low input)
Detection condition	•  The parking lock actuator detects that the parking lock actuator power supply circuit voltage is less than 8 V.
Fail-safe	Refer to the DTC table and fail-safe table according to the DTC. (See DTC TABLE [PARKING LOCK ACTUATOR].)
Possible cause	•  The following modules store DTCs. ―  PCM ―  DC-DC converter •  Lead-acid battery malfunction •  DC-DC converter malfunction •  Parking lock actuator connector or terminal malfunction •  Short to ground or open circuit in parking lock actuator power supply circuit •  Parking lock actuator malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	INSPECT PCM FOR MALFUNCTION •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is a DTC displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC INSPECTION.)
		No	Go to the next step.
2	INSPECT LEAD-ACID BATTERY FOR MALFUNCTION •  Inspect the applicable part. (See LEAD-ACID BATTERY INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning part and perform the repair completion verification. (See LEAD-ACID BATTERY RECHARGING.) (See LEAD-ACID BATTERY REMOVAL/INSTALLATION.)
3	DC-DC CONVERTER MALFUNCTION VERIFICATION •  Inspect the applicable part. (See DC-DC CONVERTER INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning part and perform the repair completion verification. (See DC-DC CONVERTER REMOVAL/INSTALLATION.)
4	INSPECT PARKING LOCK ACTUATOR CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning part and perform the repair completion verification.
5	INSPECT PARKING LOCK ACTUATOR 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.
Repair completion verification 1	VERIFY IF VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the parking lock actuator. (See DTC INSPECTION.) •  Is the same DTC displayed?	Yes	Refer to the CAN (controller area network) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1 again. •  If the malfunction is not resolved, replace the parking lock actuator, then go to the next step. (See PARKING LOCK ACTUATOR REMOVAL/INSTALLATION [A71M].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs ARE DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Is a DTC displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.