DTC: B1238:98, 23:Er23 [AUDIO]SM2445917
DTC: B1238:98, 23:Er23 [AUDIO]

id0902f6442200

DESCRIPTION

Audio amplifier power supply voltage is malfunction
DETECTION CONDITION
Audio amplifier power supply voltage of less than 8.5 V or more than 16.5 V is detected.
POSSIBLE CAUSE
• PCM DTC is stored
― Charging system malfunction
• Audio amplifier connector or terminals malfunction
• Open circuit or short to ground in wiring harness between the following terminals:
― Audio amplifier terminal 3A—Battery positive terminal
• Fuse malfunction
• Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Action
1
CONFIRM PCM DTC
• Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5].) (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [L5].)
(See DTC TABLE [L3 Turbo].)
(See DTC TABLE [MZR-CD 2.2].)
No
Go to the next step.
2
INSPECT AUDIO AMPLIFIER CONNECTOR CONDITION
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable.
• Disconnect the audio amplifier connector.
• Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the connector or terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
• Audio amplifier connector is disconnected.
• Reconnect the negative battery cable.
• Turn the ignition switch to the ON position.
• Measure the voltage at the following terminals (wiring harness-side):
― Audio amplifier terminal 3A
• Is the voltage B+?
Yes
Go to the next step.
No
If the audio amplifier terminal 3A voltage is not B+:
• Inspect the BOSE 30 A fuse.
― If the fuse is melt:
• Repair or replace the wiring harness for a possible short to ground.
• Replace the malfunctioning fuse.
― If the fuse is deterioration:
• Replace the malfunctioning fuse.
― If the fuse is normal:
• Repair or replace the wiring harness for a possible open circuit.
Go to the Step 5.
4
VERIFY TROUBLESHOOTING COMPLETED
• Turn the ignition switch to the LOCK position.
• Make sure reconnect the disconnected connectors.
• Reconnect the negative battery cable.
• Clear the DTC from the audio unit memory. (See CLEARING DTC [AUDIO].)
• Perform the audio unit DTC inspection. (See DTC INSPECTION [AUDIO].)
• Is the same DTC present?
Yes
Replace the audio amplifier, then go to the next step.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
No
Go to the next step.
5
VERIFY THAT NO OTHER DTCs ARE RECORDED
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AUDIO].)
No
DTC troubleshooting completed.