DTC U3003:16 [AUDIO AMPLIFIER]

id0902f8848900


Without i-stop System

Description

Voltage decrease input from battery
Detection condition
With the ignition switched to ACC or ON (engine off 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
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 wiring harness between audio amplifier terminal 3A and MAIN 200 A fuse
―  Short to ground in wiring harness between audio amplifier terminal 2D and AUDIO2 7.5 A fuse
―  AUDIO1 25 A fuse malfunction
―  AUDIO2 7.5 A fuse malfunction
―  AUDIO 30 A fuse malfunction
―  MAIN 200 A fuse malfunction
―  Open circuit in wiring harness between audio amplifier terminal 3A and battery (+) terminal
―  Open circuit in wiring harness between audio amplifier terminal 2D and ACC RELAY
•  Audio amplifier 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 [PCM (SKYACTIV-D 2.2)].)
(See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
(See DTC TABLE [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].)
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
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.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].)
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 [WITHOUT i-ELOOP (SKYACTIV-D 2.2)].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
No
Go to the next step.
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 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 AMPLIFIER FOR MALFUNCTION
•  Verify that the audio amplifier connector is disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition to ACC (engine off).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Audio amplifier terminal 3A
―  Audio amplifier terminal 2D
•  Is the voltage B+?
Yes
Go to Step 8.
No
•  Terminal 3A voltage is not B+
―  Go to Step 7.
•  Terminal 2D voltage is not B+
―  Go to the next step.
6
INSPECT THE AUDIO2 7.5 A FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the AUDIO2 7.5 A fuse.
•  Is there any malfunctioning part?
Yes
•  If a fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier terminal 2D and AUDIO2 7.5 A fuse.
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 a fuse is damaged:
―  Replace the fuse.
Go to Step 8.
No
Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier terminal 2D and ACC RELAY.
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.
•  Replace the fuse.
Go to Step 8.
7
INSPECT THE AUDIO 30 A FUSE, AUDIO1 25 A FUSE AND MAIN 200 A FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the AUDIO 30 A fuse, AUDIO1 25 A fuse and MAIN 200 A fuse.
•  Is there any malfunctioning part?
Yes
•  If any fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier terminal 3A and MAIN 200 A fuse.
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 any fuse is damaged:
―  Replace the fuse.
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier terminal 3A and battery (+) terminal.
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.
•  Replace the fuse.
Go to the next step.
8
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Switch the ignition off.
•  Reconnect all the disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the audio amplifier DTCs.
•  Switch the ignition to ACC or ON (engine off or on), and wait for 5 s or more.
•  Perform the audio amplifier DTC inspection.
•  Is the same Pending DTC present?
Yes
Return to Step 1 and inspect for other possible causes.
If the malfunction recurs, replace the audio amplifier, then go to the next step.
(See AUDIO AMPLIFIER 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 AMPLIFIER].)
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 (engine off 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
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 wiring harness between AUDIO1 25A fuse and audio amplifier terminal 3A
―  AUDIO1 25 A fuse malfunction
―  Open circuit in wiring harness between DC-DC converter terminal K and audio amplifier terminal 3A
―  AUDIO2 7.5 A fuse malfunction
―  Short to ground in wiring harness between DC-DC converter terminal K and audio amplifier terminal 2D
―  Open circuit between audio amplifier terminal 2D and ignition relay (ACC_STAB) terminal C
―  Open circuit in wiring harness between DC-DC converter terminal K and ignition relay (ACC_STAB) terminal D
•  Ignition relay (ACC_STAB) malfunction
•  DC-DC converter connector terminal malfunction
•  DC-DC converter malfunction
•  Audio amplifier 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 [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
(See DTC TABLE [PCM (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.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].)
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 [WITHOUT i-ELOOP (SKYACTIV-D 2.2)].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
No
Go to the next step.
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 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 AMPLIFIER FOR MALFUNCTION
•  Verify that the audio amplifier connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition to ACC (engine off).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Audio amplifier terminal 3A
―  Audio amplifier terminal 2D
•  Is the voltage B+?
Yes
Go to Step 14.
No
Terminal 3A voltage is not B+
•  Go to the next step.
Terminal 2D voltage is not B+
•  Go to Step 8.
6
INSPECT THE AUDIO1 25 A FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the AUDIO1 25 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 AMPLIFIER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Verify that the DC-DC converter and the audio amplifier 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 amplifier terminal 3A (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 amplifier terminal 3A (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 the next step.
8
INSPECT THE AUDIO2 7.5 A FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  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.
•  Disconnect the negative battery terminal.
•  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 AMPLIFIER
•  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 amplifier terminal 2D
•  Is there continuity?
Yes
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 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 14.
No
Go to the next step.
11
INSPECT FOR OPEN CIRCUIT IN WIRING HARNESS BETWEEN DC-DC CONVERTER AND AUDIO AMPLIFIER
•  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 amplifier terminal 2D
•  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 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 Step 14.
12
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 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 [WITHOUT i-ELOOP (SKYACTIV-D 2.2)].)
(See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See DC-DC CONVERTER REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
No
Go to the next step.
14
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Switch the ignition off.
•  Reconnect all the disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the audio amplifier DTCs.
•  Perform the audio amplifier DTC inspection.
•  Is the same Pending DTC present?
Yes
Return to Step 1 and inspect for other possible causes.
If the malfunction recurs, replace the audio amplifier, then go to the next step.
(See AUDIO AMPLIFIER 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 AMPLIFIER].)
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 (engine off 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
Not applicable
Possible cause
•  DTCs are stored in the PCM.
•  DC-DC converter (i-ELOOP) malfunction
•  Battery malfunction
•  Generator malfunction
•  Audio amplifier connector or terminal malfunction
•  Audio amplifier power supply circuit malfunction
―  Short to ground in wiring harness between AUDIO1 25A fuse and audio amplifier terminal 3A
―  AUDIO1 25 A fuse malfunction
―  Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 2A and audio amplifier terminal 3A
―  AUDIO2 7.5 A fuse malfunction
―  Short to ground in wiring harness between DC-DC converter (i-ELOOP) terminal 2A and audio amplifier terminal 2D
―  Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 2A and audio amplifier terminal 2D
•  Ignition relay (ACC_STAB) malfunction
•  Audio amplifier 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 [PCM (SKYACTIV-D 2.2)].)
(See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
(See DTC TABLE [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].)
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
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.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].)
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 [WITH i-ELOOP (SKYACTIV-D 2.2)].)
(See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
No
Go to the next step.
5
INSPECT AUDIO AMPLIFIER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the audio amplifier connectors.
•  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 AMPLIFIER FOR MALFUNCTION
•  Verify that the audio amplifier connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition to ACC (engine off).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Audio amplifier terminal 3A
―  Audio amplifier terminal 2D
•  Is the voltage B+?
Yes
Go to Step 13.
No
Terminal 3A voltage is not B+
•  Go to the next step.
Terminal 2D voltage is not B+
•  Go to Step 9.
7
INSPECT THE AUDIO1 25 A FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the AUDIO1 25 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 AMPLIFIER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Disconnect the service plug.
•  Disconnect the DC-DC converter (i-ELOOP) connector.
•  Verify that the audio amplifier and DC-DC converter (i-ELOOP) connectors are 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 amplifier terminal 3A (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 amplifier terminal 3A (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 the Step 13.
9
INSPECT THE AUDIO2 7.5 A FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  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)
•  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 (i-ELOOP) AND AUDIO AMPLIFIER
•  Disconnect the service plug.
•  Disconnect the DC-DC converter (i-ELOOP) connector.
•  Verify that the audio amplifier and DC-DC converter (i-ELOOP) connectors are 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 amplifier terminal 2D
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side).
•  DC-DC converter (i-ELOOP) terminal 2A and ignition relay (ACC_STAB) terminal D
•  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 13.
No
Go to the next step.
12
INSPECT FOR OPEN CIRCUIT IN WIRING HARNESS BETWEEN DC-DC CONVERTER (i-ELOOP) AND AUDIO AMPLIFIER
•  Verify that the DC-DC converter (i-ELOOP) connector is disconnected.
•  Verify that the ignition relay (ACC_STAB) is removed.
•  Inspect between the following terminals (vehicle wiring harness side) for continuity.
―  DC-DC converter (i-ELOOP) terminal 2A and ignition relay (ACC_STAB) terminal D
―  Ignition relay (ACC_STAB) terminal C and audio amplifier terminal 2D
•  Is there continuity?
Yes
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 (i-ELOOP) terminal 2A and ignition relay (ACC_STAB) terminal D
•  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.
13
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Switch the ignition off.
•  Reconnect all the disconnected connectors.
•  Connect the service plug.
•  Connect the negative battery terminal.
•  Clear the audio amplifier DTCs.
•  Perform the audio amplifier DTC inspection.
•  Is the same Pending DTC present?
Yes
Return to Step 1 and inspect for other possible causes.
If the malfunction recurs, replace the audio amplifier, then go to the next step.
(See AUDIO AMPLIFIER 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 AMPLIFIER].)
No
DTC troubleshooting completed.