DTC U3003:16 [PARKING ASSIST UNIT]

id0902q6243100


Vehicles without i-stop

Description

Parking assist unit low power supply voltage input
Detection condition
•  Parking assist unit power supply circuit voltage of 8.0 ± 0.8 V or less is detected for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  Battery malfunction
•  Generator malfunction
•  Parking assist unit connector or terminal malfunction
•  Parking assist unit power supply circuit malfunction
―  Short to ground in wiring harness between IG1 relay terminal C and parking assist unit terminal U
―  C/U IG1 15 A fuse malfunction
―  Open circuit in wiring harness between IG1 relay terminal C and parking assist unit terminal U
•  Parking assist unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY OTHER PARKING ASSIST UNIT DTCs
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is DTC U3000:49 displayed?
Yes
Replace the parking assist unit, then go to Step 7.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
2
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
No
Go to the next step.
3
INSPECT BATTERY
•  Inspect the battery.
•  Is the battery normal?
Yes
Go to the next step.
No
Recharge or replace the battery, then go to Step 7.
(See BATTERY RECHARGING [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
4
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 7.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)
5
INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the parking assist unit 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.
No
Repair or replace the connector, then go to Step 7.
6
VERIFY PARKING ASSIST UNIT POWER SUPPLY VOLTAGE
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the parking assist unit terminal U (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the C/U IG1 15 A fuse.
•  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 fuse and parking assist unit terminal U.
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 IG1 relay terminal C and parking assist unit terminal U.
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 cable.
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the parking assist unit.
Go to the next step.
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].)
No
DTC troubleshooting completed.


Vehicle with i-stop and without i-ELOOP

Description

Parking assist unit low power supply voltage input
Detection condition
•  Parking assist unit power supply circuit voltage of 8.0 ± 0.8 V or less is detected for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  Battery malfunction
•  Generator malfunction
•  DC-DC converter connector or terminal malfunction
•  Ignition relay (IG1_STAB) malfunction
•  Ignition relay (IG1_STAB) power supply circuit malfunction
―  Short to ground in wiring harness between DC-DC converter terminal K and ignition relay (IG1_STAB) terminal D
―  METER2 7.5 A fuse malfunction
―  Open circuit in wiring harness between DC-DC converter terminal K and ignition relay (IG1_STAB) terminal D
•  Parking assist unit connector or terminal malfunction
•  Parking assist unit power supply circuit malfunction
―  Short to ground in wiring harness between ignition relay (IG1_STAB) terminal C and parking assist unit terminal U
―  Open circuit in wiring harness between ignition relay (IG1_STAB) terminal C and parking assist unit terminal U
•  DC-DC converter malfunction
•  Parking assist unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY OTHER PARKING ASSIST UNIT DTCs
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is DTC U3000:49 displayed?
Yes
Replace the parking assist unit, then go to Step 11.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
2
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
No
Go to the next step.
3
INSPECT BATTERY
•  Inspect the battery.
•  Is the battery normal?
Yes
Go to the next step.
No
Recharge or replace the battery, then go to Step 11.
(See BATTERY RECHARGING [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See BATTERY RECHARGING [SKYACTIV-D 2.2].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
4
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 11.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITHOUT i-ELOOP)].)
5
INSPECT DC-DC CONVERTER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the DC-DC converter 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.
No
Repair or replace the connector, then go to Step 11.
6
INSPECT IGNITION RELAY (IG1_STAB)
•  Remove the ignition relay (IG1_STAB).
•  Inspect the ignition relay (IG1_STAB).
•  Is the ignition relay (IG1_STAB) normal?
Yes
Go to the next step.
No
Replace the ignition relay (IG1_STAB), then go to Step 11.
(See RELAY LOCATION.)
7
VERIFY IGNITION RELAY (IG1_STAB) POWER SUPPLY VOLTAGE
•  Ignition relay (IG1_STAB) is removed.
•  Connect the DC-DC converter connector.
•  Connect the negative battery cable.
•  Measure the voltage at the ignition relay (IG1_STAB) terminal D (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the METER2 7.5 A fuse.
•  If the fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between DC-DC converter terminal K and ignition relay (IG1_STAB) terminal D.
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 DC-DC converter terminal K and ignition relay (IG1_STAB) terminal D.
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 Step 11.
8
INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the parking assist unit 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.
No
Repair or replace the connector, then go to Step 11.
9
VERIFY PARKING ASSIST UNIT POWER SUPPLY VOLTAGE
•  Install the ignition relay (IG1_STAB).
•  Connect the DC-DC converter connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the parking assist unit terminal U (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between ignition relay (IG1_STAB) terminal C and parking assist unit terminal U.
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 or open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground or open circuit.
Go to Step 11.
10
INSPECT DC-DC CONVERTER
•  Inspect the DC-DC converter.
•  Is the DC-DC converter normal?
Yes
Go to the next step.
No
Replace the DC-DC converter, then go to the next step.
(See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)
(See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITHOUT i-ELOOP)].)
11
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the parking assist unit.
Go to the next step.
No
Go to the next step.
12
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].)
No
DTC troubleshooting completed.


Vehicles with i-stop and i-ELOOP

Description

Parking assist unit low power supply voltage input
Detection condition
•  Parking assist unit power supply circuit voltage of 8.0 ± 0.8 V or less is detected for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  DTCs are stored in the DC-DC converter (i-ELOOP).
•  Battery malfunction
•  Generator malfunction
•  Parking assist unit connector or terminal malfunction
•  Parking assist unit power supply circuit malfunction
―  Short to ground in wiring harness between ignition relay (IG1_STAB) terminal C and parking assist unit terminal U
―  Open circuit in wiring harness between ignition relay (IG1_STAB) terminal C and parking assist unit terminal U
•  Parking assist unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY OTHER PARKING ASSIST UNIT DTCs
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is DTC U3000:49 displayed?
Yes
Replace the parking assist unit, then go to Step 8.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
2
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
No
Go to the next step.
3
VERIFY DC-DC CONVERTER (i-ELOOP) DTCs
•  Retrieve the DC-DC converter (i-ELOOP) DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [i-ELOOP].)
No
Go to the next step.
4
INSPECT BATTERY
•  Inspect the battery.
•  Is the battery normal?
Yes
Go to the next step.
No
Recharge or replace the battery, then go to Step 8.
(See BATTERY RECHARGING [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See BATTERY RECHARGING [SKYACTIV-D 2.2].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
5
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 8.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITH i-ELOOP)].)
6
INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the parking assist unit 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.
No
Repair or replace the connector, then go to Step 8.
7
VERIFY PARKING ASSIST UNIT POWER SUPPLY VOLTAGE
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the parking assist unit terminal U (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between ignition relay (IG1_STAB) terminal C and parking assist unit terminal U.
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 or open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground or open circuit.
Go to the next step.
8
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the parking assist unit.
Go to the next step.
No
Go to the next step.
9
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].)
No
DTC troubleshooting completed.