DTC U3003:16 [AUDIO AMPLIFIER]

id0902f8848900


Without i-stop

Description

Audio amplifier low power supply voltage input
Detection condition
•  With the ignition switched to ACC or ON, the audio amplifier detects voltage from the battery of 9.0 ± 0.8 V or less for 5 s or more.
Fail-safe function
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  Battery malfunction
•  Generator malfunction
•  Audio amplifier connector or terminal malfunction
•  Audio amplifier power supply circuit malfunction
―  Short to ground in the wiring harness between the following terminals:
•  AUDIO2 7.5 A fuse—Audio amplifier terminal 2D
•  MAIN 200 A fuse—Audio amplifier terminal 3A
―  AUDIO2 7.5 A fuse malfunction
―  BOSE 25 A fuse malfunction
―  AUDIO 30 A fuse malfunction
―  MAIN 200 A fuse malfunction
―  Open circuit in wiring harness between the following terminals:
•  ACC relay terminal D—Audio amplifier terminal 2D
•  Battery positive terminal—Audio amplifier terminal 3A
•  Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  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 (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].)
No
Go to the next step.
2
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 6.
(See BATTERY RECHARGING.)
(See BATTERY REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 6.
(See GENERATOR REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
4
INSPECT AUDIO AMPLIFIER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the audio amplifier 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 6.
5
INSPECT POWER SUPPLY CIRCUIT OF AUDIO AMPLIFIER FOR MALFUNCTION
•  Verify that the audio amplifier is disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
―  Audio amplifier terminal 2D
―  Audio amplifier terminal 3A
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the AUDIO2 7.5 A fuse, BOSE 25 A fuse, and AUDIO 30 A fuse.
•  Any fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  AUDIO2 7.5 A fuse—Audio amplifier terminal 2D
•  MAIN 200 A fuse—Audio amplifier terminal 3A
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.
•  Any fuse is damaged:
―  Replace the fuse.
•  All fuses are normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  ACC relay terminal D—Audio amplifier terminal 2D
•  Battery positive terminal—Audio amplifier terminal 3A
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.
6
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the audio amplifier using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the audio amplifier DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the audio amplifier.
Go to the next step.
No
Go to the next step.
7
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO AMPLIFIER].)
No
DTC troubleshooting completed.


With i-stop and Without i-ELOOP

Description

Audio amplifier low power supply voltage input
Detection condition
•  With the ignition switched to ACC or ON, the audio amplifier detects voltage from the battery of 9.0 ± 0.8 V or less for 5 s or more.
Fail-safe function
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  Battery malfunction
•  Generator malfunction
•  Ignition relay (ACC_STAB) malfunction
•  Audio amplifier connector or terminal malfunction
•  Audio amplifier power supply circuit malfunction
―  Short to ground in the wiring harness between the following terminals:
•  AUDIO2 7.5 A fuse—Ignition relay (ACC_STAB) terminal D
•  BOSE 25 A fuse—Audio amplifier terminal 3A
―  AUDIO2 7.5 A fuse malfunction
―  BOSE 25 A fuse malfunction
―  Open circuit in wiring harness between the following terminals:
•  DC-DC converter terminal K—Ignition relay (ACC_STAB) terminal D
•  DC-DC converter terminal K—Audio amplifier terminal 3A
•  DC-DC converter connector or terminal malfunction
•  DC-DC converter malfunction
•  Short to ground in the wiring harness between ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D
•  Open circuit in the wiring harness between ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D
•  Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  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)].)
No
Go to the next step.
2
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.)
(See BATTERY REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See BATTERY REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 6.
(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].)
4
INSPECT IGNITION RELAY (ACC_STAB)
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Remove the ignition relay (ACC_STAB).
•  Inspect the ignition relay (ACC_STAB).
•  Is the ignition relay (ACC_STAB) normal?
Yes
Go to the next step.
No
Repair or replace the ignition relay (ACC_STAB), then go to Step 11.
(See RELAY LOCATION.)
5
INSPECT AUDIO AMPLIFIER CONNECTOR CONDITION
•  Disconnect the audio amplifier 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 POWER SUPPLY CIRCUIT OF AUDIO AMPLIFIER FOR MALFUNCTION
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Verify that the audio amplifier is disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
―  Ignition relay (ACC_STAB) terminal D
―  Audio amplifier terminal 3A
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the AUDIO2 7.5 A fuse and BOSE 25 A fuse.
•  Any fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  AUDIO2 7.5 A fuse—Ignition relay (ACC_STAB) terminal D
•  BOSE 25 A fuse—Audio amplifier terminal 3A
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.
•  Any fuse is damaged:
―  Replace the fuse.
•  All fuses are normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  DC-DC converter terminal K—Ignition relay (ACC_STAB) terminal D
•  DC-DC converter terminal K—Audio amplifier terminal 3A
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.
7
INSPECT DC-DC CONVERTER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  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.
8
INSPECT DC-DC CONVERTER
•  Inspect 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 [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See DC-DC CONVERTER REMOVAL/INSTALLATION [WITHOUT i-ELOOP (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].)
9
INSPECT FOR SHORT TO GROUND BETWEEN IGNITION RELAY (ACC_STAB) AND AUDIO AMPLIFIER
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Verify that the audio amplifier is disconnected.
•  Inspect for continuity between audio amplifier terminal 2D (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D.
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 Step 11.
No
Go to the next step.
10
INSPECT FOR OPEN CIRCUIT BETWEEN IGNITION RELAY (ACC_STAB) AND AUDIO AMPLIFIER
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Verify that the audio amplifier is disconnected.
•  Inspect for continuity between ignition relay (ACC_STAB) terminal C (wiring harness-side) and audio amplifier terminal 2D (wiring harness-side).
•  Is there continuity?
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 (ACC_STAB) terminal C and audio amplifier terminal 2D.
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.
11
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the audio amplifier using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the audio amplifier DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the audio amplifier.
Go to the next step.
No
Go to the next step.
12
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO AMPLIFIER].)
No
DTC troubleshooting completed.


With i-stop and i-ELOOP

Description

Audio amplifier low power supply voltage input
Detection condition
•  With the ignition switched to ACC or ON, the audio amplifier detects voltage from the battery of 9.0 ± 0.8 V or less for 5 s or more.
Fail-safe function
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  DTCs are stored in the DC-DC converter (i-ELOOP).
•  Battery malfunction
•  Generator malfunction
•  Ignition relay (ACC_STAB) malfunction
•  Audio amplifier connector or terminal malfunction
•  Audio amplifier power supply circuit malfunction
―  Short to ground in the wiring harness between the following terminals:
•  AUDIO2 7.5 A fuse—Ignition relay (ACC_STAB) terminal D
•  BOSE 25 A fuse—Audio amplifier terminal 3A
―  AUDIO2 7.5 A fuse malfunction
―  BOSE 25 A fuse malfunction
―  Open circuit in wiring harness between the following terminals:
•  DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal D
•  DC-DC converter (i-ELOOP) terminal 2A—Audio amplifier terminal 3A
•  DC-DC converter (i-ELOOP) connector or terminal malfunction
•  DC-DC converter (i-ELOOP) malfunction
•  Short to ground in the wiring harness between ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D
•  Open circuit in the wiring harness between ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D
•  Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].)
No
Go to the next step.
2
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.
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.)
(See BATTERY REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (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 11.
(See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].)
5
INSPECT IGNITION RELAY (ACC_STAB)
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Remove the ignition relay (ACC_STAB).
•  Inspect the ignition relay (ACC_STAB).
•  Is the ignition relay (ACC_STAB) normal?
Yes
Go to the next step.
No
Repair or replace the ignition relay (ACC_STAB), then go to Step 11.
(See RELAY LOCATION.)
6
INSPECT AUDIO AMPLIFIER CONNECTOR CONDITION
•  Disconnect the audio amplifier 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.
7
INSPECT POWER SUPPLY CIRCUIT OF AUDIO AMPLIFIER FOR MALFUNCTION
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Verify that the audio amplifier is disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
―  Ignition relay (ACC_STAB) terminal D
―  Audio amplifier terminal 3A
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the AUDIO2 7.5 A fuse and BOSE 25 A fuse.
•  Any fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  AUDIO2 7.5 A fuse—Ignition relay (ACC_STAB) terminal D
•  BOSE 25 A fuse—Audio amplifier terminal 3A
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.
•  Any fuse is damaged:
―  Replace the fuse.
•  All fuses are normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal D
•  DC-DC converter (i-ELOOP) terminal 2A—Audio amplifier terminal 3A
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 DC-DC CONVERTER (i-ELOOP) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the DC-DC converter (i-ELOOP) 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
INSPECT DC-DC CONVERTER (i-ELOOP)
•  Inspect the DC-DC converter (i-ELOOP).
•  Is the DC-DC converter (i-ELOOP) normal?
Yes
Go to the next step.
No
Repair or replace the DC-DC converter (i-ELOOP), then go to Step 11.
(See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].)
10
INSPECT FOR SHORT TO GROUND BETWEEN IGNITION RELAY (ACC_STAB) AND AUDIO AMPLIFIER
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Verify that the audio amplifier is disconnected.
•  Inspect for continuity between audio amplifier terminal 2D (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D.
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 Step 11.
No
Go to the next step.
11
INSPECT FOR OPEN CIRCUIT BETWEEN IGNITION RELAY (ACC_STAB) AND AUDIO AMPLIFIER
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Verify that the audio amplifier is disconnected.
•  Inspect for continuity between ignition relay (ACC_STAB) terminal C (wiring harness-side) and audio amplifier terminal 2D (wiring harness-side).
•  Is there continuity?
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 (ACC_STAB) terminal C and audio amplifier terminal 2D.
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.
12
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the audio amplifier using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the audio amplifier DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the audio amplifier.
Go to the next step.
No
Go to the next step.
13
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO AMPLIFIER].)
No
DTC troubleshooting completed.