DTC U3003:16 [PARKING ASSIST UNIT (OPTICAL)]

id0902r0056700

Description

Parking assist unit (optical) low power supply voltage input

Detection condition

•  The parking assist unit (optical) detects that the power supply voltage of the parking assist unit (optical) is less than the specified range for a certain period of time.

Fail-safe

•  Black screen displayed when system is starting

Possible cause

•  DTCs are stored in the PCM.

•  Battery malfunction

•  Generator malfunction

•  Parking assist unit (optical) connector or terminal malfunction

•  Parking assist unit (optical) power supply circuit malfunction

―  Short to ground in wiring harness between MAIN 200 A fuse and parking assist unit (optical) terminal A

―  ROOM 15 A fuse malfunction

―  MAIN 200 A fuse malfunction

―  Open circuit in wiring harness between battery positive terminal and parking assist unit (optical) terminal A

•  Parking assist unit (optical) malfunction

Description	Parking assist unit (optical) low power supply voltage input
Detection condition	• The parking assist unit (optical) detects that the power supply voltage of the parking assist unit (optical) is less than the specified range for a certain period of time.
Fail-safe	• Black screen displayed when system is starting
Possible cause	• DTCs are stored in the PCM. • Battery malfunction • Generator malfunction • Parking assist unit (optical) connector or terminal malfunction • Parking assist unit (optical) power supply circuit malfunction ― Short to ground in wiring harness between MAIN 200 A fuse and parking assist unit (optical) terminal A ― ROOM 15 A fuse malfunction ― MAIN 200 A fuse malfunction ― Open circuit in wiring harness between battery positive terminal and parking assist unit (optical) terminal A • Parking assist unit (optical) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY OTHER PARKING ASSIST UNIT (OPTICAL) DTCs • Clear the DTC for the parking assist unit (optical) using the M-MDS. (See CLEARING DTC [PARKING ASSIST UNIT (OPTICAL)].) • Retrieve the parking assist unit (optical) DTCs using the M-MDS. (See DTC INSPECTION [PARKING ASSIST UNIT (OPTICAL)].) • Is DTC U3000:41 or U3000:49 displayed?	Yes	Replace the parking assist unit (optical), then go to Step 7. (See PARKING ASSIST UNIT (OPTICAL) REMOVAL/INSTALLATION.)
1		No	Go to the next step.
2	VERIFY PCM DTCs • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) (See ON-BOARD DIAGNOSTIC TEST [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See ON-BOARD DIAGNOSTIC TEST [PCM (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].) (See DTC TABLE [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See DTC TABLE [PCM (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
2		No	Go to the next step.
3	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION.) • Is the battery normal?	Yes	Go to the next step.
3		No	Recharge or replace the battery, then go to Step 7. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See BATTERY REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
4	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See GENERATOR INSPECTION [WITHOUT i-ELOOP (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See GENERATOR INSPECTION [SKYACTIV-G 2.5T].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].) • Is the generator normal?	Yes	Go to the next step.
4		No	Replace the generator, then go to Step 7. (See GENERATOR REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].)
5	INSPECT PARKING ASSIST UNIT (OPTICAL) CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the parking assist unit (optical) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
5		No	Repair or replace the connector, then go to Step 7.
6	VERIFY PARKING ASSIST UNIT (OPTICAL) POWER SUPPLY VOLTAGE • Always reconnect all disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Display PID VPWR using the M-MDS. (See PID/DATA MONITOR INSPECTION [PARKING ASSIST UNIT (OPTICAL)].) • Is the voltage B+?	Yes	Go to the next step.
6		No	Inspect the ROOM 15 A fuse and MAIN 200 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and parking assist unit (optical) terminal A. 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 fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and parking assist unit (optical) terminal A. 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	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC for the parking assist unit (optical) using the M-MDS. (See CLEARING DTC [PARKING ASSIST UNIT (OPTICAL)].) • Retrieve the parking assist unit (optical) DTCs using the M-MDS. (See DTC INSPECTION [PARKING ASSIST UNIT (OPTICAL)].) • Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the parking assist unit (optical). (See PARKING ASSIST UNIT (OPTICAL) REMOVAL/INSTALLATION.) Go to the next step.
7		No	Go to the next step.
8	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING ASSIST UNIT (OPTICAL)].)
8		No	DTC troubleshooting completed.