DTC: U3003:16, 09:Er20 [AUDIO]

id0902f6441700


Without i-stop System

Description

Voltage decrease input from battery
Detection condition
With the ignition switched to ACC or ON, the audio unit detects voltage from the battery of 10 V or less for 30 s or more.
Fail-safe function
Not applicable
Possible cause
•  Battery malfunction
•  Generator malfunction
•  Audio unit connector or terminal malfunction
•  Audio unit power supply circuit malfunction
―  Short to ground in the wiring harness between audio unit terminal 1B and battery (+) terminal.
―  Short to ground in wiring harness between audio unit terminal 1R and ACC RELAY
―  AUDIO1 15 A fuse malfunction
―  AUDIO2 7.5 A fuse malfunction
―  CABIN. +B 50 A fuse malfunction
―  MAIN 200 A fuse malfunction
―  Open circuit in wiring harness between audio unit terminal 1B and battery (+) terminal
―  Open circuit in wiring harness between audio unit terminal 1R and ACC RELAY
•  Audio unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Perform the DTC inspection for the PCM using the M-MDS.
•  Is the DTC displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
No
Go to the next step.
2
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunctioning part?
Yes
Recharge or replace the battery, then go to Step 8.
(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].)
No
Go to the next step.
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is there any malfunctioning part?
Yes
Replace the generator, then go to Step 8.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)
No
Go to the next step.
4
INSPECT AUDIO UNIT CONNECTOR CONDITION
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Disconnect the audio unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 8.
No
Go to the next step.
5
INSPECT POWER SUPPLY CIRCUIT OF AUDIO UNIT FOR MALFUNCTION
•  Verify that the audio unit connector is disconnected.
•  Connect the negative battery cable.
•  Switch the ignition to ACC (engine off).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Audio unit terminal 1B
―  Audio unit terminal 1R
•  Is the voltage B+?
Yes
Go to Step 8.
No
•  Terminal 1B voltage is not B+
―  Go to Step 7.
•  Terminal 1R voltage is not B+
―  Go to the next step.
6
INSPECT AUDIO UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Inspect the AUDIO2 7.5 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the malfunctioning fuse.
•  If a fuse is damaged:
―  Replace the malfunctioning fuse.
Go to Step 8.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 8.
7
INSPECT AUDIO UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Inspect the CABIN. +B 50 A fuse, AUDIO1 15A fuse and MAIN 200 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the malfunctioning fuse.
•  If a fuse is damaged:
―  Replace the malfunctioning fuse.
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Switch the ignition off (LOCK).
•  Reconnect all the disconnected connectors.
•  Connect the negative battery cable.
•  Clear the audio unit DTCs.
•  Perform the audio unit DTC inspection.
•  Is the same DTC displayed?
Yes
Return to Step 1 and inspect for other possible causes.
If the malfunction recurs, replace the audio unit, then go to the next step.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
9
VERIFY IF OTHER DTCs DISPLAYED
•  Verify if other DTCs are displayed.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO].)
No
DTC troubleshooting completed.


Without i-ELOOP, with i-stop System

Description

Voltage decrease input from battery
Detection condition
With the ignition switched to ACC or ON, the audio unit detects voltage from the battery of 10 V or less for 30 s or more.
Fail-safe function
Not applicable
Possible cause
•  Battery malfunction
•  Generator malfunction
•  Audio unit connector or terminal malfunction
•  Audio unit power supply circuit malfunction
―  Short to ground in wiring harness between AUDIO1 15A fuse and audio unit terminal 1B
―  AUDIO1 15 A fuse malfunction
―  Open circuit in wiring harness between DC-DC converter terminal K and audio unit terminal 1B
―  AUDIO2 7.5 A fuse malfunction
―  Short to ground in wiring harness between DC-DC converter terminal K and audio unit terminal 1R
―  Open circuit between audio unit terminal 1R and ignition relay (ACC_STAB) terminal C
―  Open circuit in wiring harness between DC-DC converter terminal K and ignition relay terminal D
•  Ignition relay (ACC_STAB) malfunction
•  DC-DC converter connector terminal malfunction
•  DC-DC converter malfunction
•  Audio unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Perform the DTC inspection for the PCM using the M-MDS.
•  Is the DTC displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See DTC TABLE [SKYACTIV-D 2.2].)
No
Go to the next step.
2
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunctioning part?
Yes
Recharge or replace the battery, then go to Step 14.
(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].)
No
Go to the next step.
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is there any malfunctioning part?
Yes
Replace the generator, then go to Step 14.
(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)].)
No
Go to the next step.
4
INSPECT AUDIO UNIT CONNECTOR CONDITION
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Disconnect the audio unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 14.
No
Go to the next step.
5
INSPECT POWER SUPPLY CIRCUIT OF AUDIO UNIT FOR MALFUNCTION
•  Verify that the audio unit connector is disconnected.
•  Connect the negative battery cable.
•  Switch the ignition to ACC (engine off).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Audio unit terminal 1B
―  Audio unit terminal 1R
•  Is the voltage B+?
Yes
Go to Step 14.
No
Terminal 1B voltage is not B+
•  Go to the next step.
Terminal 1R voltage is not B+
•  Go to Step 8.
6
INSPECT THE AUDIO1 15 A FUSE
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Inspect the AUDIO1 15 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the malfunctioning fuse.
•  If a fuse is damaged:
―  Replace the malfunctioning fuse.
Go to Step 14.
No
Go to the next step.
7
INSPECT AUDIO UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Verify that the DC-DC converter and the audio unit connectors are disconnected.
•  Verify the wiring harness between the following terminals (vehicle wiring harness side) for continuity.
―  DC-DC converter terminal K (vehicle wiring harness side) and the audio unit terminal 1B (vehicle wiring harness side).
•  Is there continuity?
Yes
Go to Step 12.
No
Refer to the wiring diagram and verify whether or not there is a common connector between DC-DC converter terminal K (vehicle wiring harness side) and the audio unit terminal 1B (vehicle wiring harness side).
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 14.
8
INSPECT THE AUDIO2 7.5 A FUSE
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Inspect the AUDIO2 7.5 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the malfunctioning fuse.
•  If a fuse is damaged:
―  Replace the malfunctioning fuse.
Go to Step 14.
No
Go to the next step.
9
INSPECT IGNITION RELAY (ACC_STAB).
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Remove the ignition relay (ACC_STAB).
•  Inspect ignition relay (ACC_STAB).
•  Is there any malfunctioning part?
Yes
Repair or replace the ignition relay (ACC_STAB), then go to Step 14.
No
Go to the next step.
10
INSPECT WIRING HARNESS FOR SHORT TO GROUND BETWEEN DC-DC CONVERTER AND AUDIO UNIT
•  Verify that the DC-DC converter connector is disconnected.
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
―  Ignition relay (ACC_STAB) terminal D
―  Audio unit terminal 1R
•  Is there continuity?
Yes
Repair or replace the wiring harness which is shorted to ground, then go to Step 14.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side).
•  DC-DC converter terminal K and ignition relay (ACC_STAB) terminal D
•  Ignition relay (ACC_STAB) terminal C and audio unit terminal 1R
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.
Go to the next step.
11
INSPECT FOR OPEN CIRCUIT IN WIRING HARNESS BETWEEN DC-DC CONVERTER AND AUDIO UNIT
•  Verify that the DC-DC converter connector is disconnected.
•  Inspect between the following terminals (vehicle wiring harness side) for continuity.
―  DC-DC converter terminal K and ignition relay (ACC_STAB) terminal D
―  Ignition relay (ACC_STAB) terminal C and Audio unit terminal 1R
•  Is there continuity?
Yes
Connect the DC-DC connector and go to the next step.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side).
•  DC-DC converter terminal K and ignition relay (ACC_STAB) terminal D
•  Ignition relay (ACC_STAB) terminal C and audio unit terminal 1R
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 14.
12
INSPECT DC-DC CONVERTER CONNECTOR AND TERMINAL CONDITION
•  Switch the ignition off (LOCK).
•  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 there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 14.
No
Go to the next step.
13
INSPECT DC-DC CONVERTER
•  Inspect the DC-DC converter.
•  Is there any malfunctioning part?
Yes
Repair or replace the DC-DC converter and 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)].)
No
Go to the next step.
14
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Switch the ignition off (LOCK).
•  Reconnect all the disconnected connectors.
•  Connect the negative battery cable.
•  Clear the audio unit DTCs.
•  Perform the audio unit DTC inspection.
•  Is the same DTC displayed?
Yes
Return to Step 1 and inspect for other possible causes.
If the malfunction recurs, replace the audio unit, then go to the next step.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
15
VERIFY IF OTHER DTCs DISPLAYED
•  Verify if other DTCs are displayed.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO].)
No
DTC troubleshooting completed.


With i-ELOOP, with i-stop System

Description

Voltage decrease input from battery
Detection condition
With the ignition switched to ACC or ON, the audio unit detects voltage from the battery of 10 V or less for 30 s or more.
Fail-safe function
Not applicable
Possible cause
•  DC-DC converter (i-ELOOP) malfunction
•  Battery malfunction
•  Generator malfunction
•  Audio unit connector or terminal malfunction
•  Audio unit power supply circuit malfunction
―  Short to ground in wiring harness between AUDIO1 15A fuse and audio unit terminal 1B
―  AUDIO1 15 A fuse malfunction
―  Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 2A and audio unit terminal 1B
―  AUDIO2 7.5 A fuse malfunction
―  Short to ground in wiring harness between DC-DC converter (i-ELOOP) terminal 2A and audio unit terminal 1R
―  Open circuit between DC-DC converter (i-ELOOP) terminal 2A and audio unit terminal 1R
•  Ignition relay (ACC_STAB) malfunction
•  Audio unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Perform the DTC inspection for the PCM using the M-MDS.
•  Is the DTC displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See DTC TABLE [SKYACTIV-D 2.2].)
No
Go to the next step.
2
INSPECT DC-DC CONVERTER (i-ELOOP)
•  Inspect the DC-DC converter (i-ELOOP).
•  Is there any malfunctioning part?
Yes
Repair or replace the DC-DC converter (i-ELOOP) and go to Step 13.
(See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].)
No
Go to the next step.
3
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunctioning part?
Yes
Recharge or replace the battery, then go to Step 13.
(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].)
No
Go to the next step.
4
INSPECT GENERATOR
•  Inspect the generator.
•  Is there any malfunctioning part?
Yes
Replace the generator, then go to Step 13.
(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)].)
No
Go to the next step.
5
INSPECT AUDIO UNIT CONNECTOR CONDITION
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Disconnect the audio unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 13.
No
Go to the next step.
6
INSPECT POWER SUPPLY CIRCUIT OF AUDIO UNIT FOR MALFUNCTION
•  Verify that the audio unit connector is disconnected.
•  Connect the negative battery cable.
•  Switch the ignition to ACC (engine off).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Audio unit terminal 1B
―  Audio unit terminal 1R
•  Is the voltage B+?
Yes
Go to Step 13.
No
Terminal 1B voltage is not B+
•  Go to the next step.
Terminal 1R voltage is not B+
•  Go to Step 9.
7
INSPECT THE AUDIO1 15 A FUSE
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Inspect the AUDIO1 15 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the malfunctioning fuse.
•  If a fuse is damaged:
―  Replace the malfunctioning fuse.
Go to Step 13.
No
Go to the next step.
8
INSPECT AUDIO UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Disconnect the service plug.
•  Disconnect the DC-DC converter (i-ELOOP) connector.
•  Verify that the audio unit connector is disconnected.
•  Verify the wiring harness between the following terminals (vehicle wiring harness side) for continuity.
―  DC-DC converter (i-ELOOP) terminal 2A (vehicle wiring harness side) and the audio unit terminal 1B (vehicle wiring harness side).
•  Is there continuity?
Yes
Go to Step 13.
No
Refer to the wiring diagram and verify whether or not there is a common connector between DC-DC converter (i-ELOOP) terminal 2A (vehicle wiring harness side) and the audio unit terminal 1B (vehicle wiring harness side).
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 13.
9
INSPECT THE AUDIO2 7.5 A FUSE
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Inspect the AUDIO2 7.5 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the malfunctioning fuse.
•  If a fuse is damaged:
―  Replace the malfunctioning fuse.
Go to Step 13.
No
Go to the next step.
10
INSPECT IGNITION RELAY (ACC_STAB).
•  Switch the ignition off (LOCK).
•  Disconnect the negative battery cable.
•  Remove the ignition relay (ACC_STAB).
•  Inspect ignition relay (ACC_STAB).
•  Is there any malfunctioning part?
Yes
Repair or replace the ignition relay (ACC_STAB), then go to Step 13.
No
Go to the next step.
11
INSPECT WIRING HARNESS FOR SHORT TO GROUND BETWEEN DC-DC CONVERTER AND AUDIO UNIT
•  Verify that the DC-DC converter (i-ELOOP) connector is disconnected.
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
―  Ignition relay (ACC_STAB) terminal D
―  Audio unit terminal 1R
•  Is there continuity?
Yes
Repair or replace the wiring harness which is shorted to ground, then go to Step 13.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side).
•  DC-DC converter terminal K and ignition relay (ACC_STAB) terminal D
•  Ignition relay (ACC_STAB) terminal C and audio unit terminal 1R
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.
Go to the next step.
12
INSPECT FOR OPEN CIRCUIT IN WIRING HARNESS BETWEEN DC-DC CONVERTER AND AUDIO UNIT
•  Verify that the DC-DC converter connector is disconnected.
•  Inspect between the following terminals (vehicle wiring harness side) for continuity.
―  DC-DC converter terminal 2A and ignition relay (ACC_STAB) terminal D
―  Ignition relay (ACC_STAB) terminal C and Audio unit terminal 1R
•  Is there continuity?
Yes
Connect the DC-DC connector and go to the next step.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side).
•  DC-DC converter terminal K and ignition relay (ACC_STAB) terminal D
•  Ignition relay (ACC_STAB) terminal C and audio unit terminal 1R
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.
13
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Switch the ignition off (LOCK).
•  Reconnect all the disconnected connectors.
•  Connect the negative battery cable.
•  Clear the audio unit DTCs.
•  Perform the audio unit DTC inspection.
•  Is the same DTC displayed?
Yes
Return to Step 1 and inspect for other possible causes.
If the malfunction recurs, replace the audio unit, then go to the next step.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
14
VERIFY IF OTHER DTCs DISPLAYED
•  Verify if other DTCs are displayed.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO].)
No
DTC troubleshooting completed.