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Infiniti Q45 (FY33). Manual - part 308

TEL209A

IDX

AUDIO

Wiring Diagram — AUDIO — (Cont’d)

EL-223

TEL110M

AUDIO

Wiring Diagram — AUDIO — (Cont’d)

EL-224

Trouble Diagnoses

AUDIO UNIT (BOSE SYSTEM)

Symptom

Possible causes

Repair order

Audio unit inoperative (no digi-
tal display and no sound from
speakers).

1. 10A fuse

2. Poor audio unit case ground
3. Audio unit

1. Check 10A fuse [No.

, located in the fuse block (J/B)].

Turn ignition switch ACC or ON and verify that battery posi-
tive voltage is present at terminal

of audio unit.

2. Check audio unit case ground.
3. Remove audio unit for repair.

Audio unit controls are
operational, but no sound is
heard from any speaker.

1. AMP ON signal

2. Audio amp. relay
3. Audio amp. relay ground
4. Poor speaker amp. case ground
5. Speaker amp. output
6. Speaker amp.

1. Turn ignition switch ACC and radio ON. Verify battery positive

voltage is present from audio unit terminal

to BOSE

speaker amp. terminal

and audio amp. relay terminal

2. Check audio amp. relay.
3. Check audio amp. relay ground (Terminal

4. Check speaker amp. case ground.
5. Check speaker amp. output voltage.
6. Remove speaker amp. for repair.

Audio unit presets are lost
when ignition switch is turned
OFF.

1. 15A fuse

2. Audio unit

1. Check 15A fuse [No.

, located in the fuse, fusible link and

relay box] and verify that battery positive voltage is present
at terminal

of audio unit.

2. Remove audio unit for repair.

Individual speaker is noisy or
inoperative.

1. Speaker
2. Speaker ground
3. Power supply

4. Audio unit/speaker amp. output
5. Speaker circuit

6. Audio unit/speaker amp.
7. Speaker

1. Check speaker.
2. Check speaker ground (Terminal

: RR LH,

: RR RH).

3. Check power supply for speaker (Terminal

: RR LH,

RR RH).

4. Check radio/speaker amp. output voltage.
5. Check wires for open or short between audio unit, amp. and

speaker.

6. Remove audio unit or speaker amp. for repair.
7. Replace speaker.

AM stations are weak or noisy
(FM stations OK).

1. Antenna
2. Poor audio unit ground
3. Audio unit

1. Check antenna.
2. Check audio unit ground.
3. Remove audio unit for repair.

FM stations are weak or noisy
(AM stations OK).

1. Window antenna
2. Audio unit

1. Check window antenna.
2. Remove audio unit for repair.

Radio generates noise in AM
and FM modes with engine
running.

1. Poor audio unit ground
2. Loose or missing ground bonding straps
3. Ignition condenser or rear window defogger

noise suppressor condenser

4. Alternator
5. Ignition coil or secondary wiring
6. Audio unit

1. Check audio unit ground.
2. Check ground bonding straps.
3. Replace ignition condenser or rear window defogger noise

suppressor condenser.

4. Check alternator.
5. Check ignition coil and secondary wiring.
6. Remove audio unit for repair.

Radio generates noise in AM
and FM modes with accesso-
ries on (switch pops and motor
noise).

1. Poor audio unit ground
2. Antenna
3. Accessory ground
4. Faulty accessory

1. Check audio unit ground.
2. Check antenna.
3. Check accessory ground.
4. Replace accessory.

IDX

AUDIO

EL-225

CD AUTOCHANGER

Symptom

Possible causes

Repair order

No play of the CD after CD play button
is pushed.

There is no error code shown on
the audio unit.

1. Audio unit

(The audio unit is not working.)

2. Harness connection

(Magazine does not eject.)

3. Changer

1. Remove the audio unit for repair.

2. Check harness connection.

3. Remove the changer for repair.

Error code [CD Err] is shown on
the audio unit.

1. Discs

2. Magazine does not eject or a

disc remains in CD player.

3. Changer

1. Inspect discs.

(Refer to testing magazines and discs.)

2. Reset the changer.

(Disconnect harness connector at the changer and reconnect
after 30 sec.)

3. Remove the changer for repair.

CD skipping.

1. Rough road driving
2. Discs

3. Bracket
4. Changer

1. System is not malfunctioning.
2. Inspect discs.

(Refer to testing magazines and discs.)

3. Check and repair bracket and installation of changer.
4. Remove the changer for repair.

Error code [CD no disk] is shown on the
audio unit after CD play button is
pressed.

1. Magazine setting
2. Magazine

3. Changer

1. Confirm the magazine is pushed completely.
2. Inspect magazine.

(Refer to testing magazines and discs.)

3. Remove the changer for repair.

Error code [CD HHHH] is shown on the
audio unit after CD play button is
pressed.

1. Overheat

2. Reset the Error code

3. Audio unit or changer

1. Turn the radio off. Open the trunk lid to lower the trunk room

and changer temperature.

2. Reset the audio unit or changer.

(Disconnect harness connector at the audio unit or changer and
reconnect.)

3. Remove the audio unit or changer for repair.

Testing magazines and discs

1. Confirm discs are installed correctly into the magazine (not upside down).
2. Visually inspect/compare the customer’s discs with each other and other discs.

Identify any of the following conditions:

Discs with a large outside diameter. [Normal size is 120 mm (4.72 in).]

Discs with rough or lipped edges.

Discs with excessive thickness [Normal size is 1.2 mm (0.047 in).]

Discs with scratches, abrasions, or pits on the surface.

Discs with grease/oil, fingerprints, foreign material.

Discs are warped due to excessive heat exposure.

3. Slide/place the discs in and out of the various magazine positions.

Identify any discs and/or positions that require additional force for placement/ejection. If interference
(sticking, excessive tensions) is found, replace the magazine or the discs.

Note

Discs which are marginally out of specification (ex. dirty, scratched and so on) may play correctly
on a home stereo.
However, when used in the automotive environment skipping may occur due to the added vehicle
movement and/or vibration due to road conditions. Autochangers should not be replaced when
discs are at fault.

Use a soft damp cloth to wipe the discs starting from the center outward in radial direction. Never
use chemical cleaning solutions to clean the discs.

AUDIO

Trouble Diagnoses (Cont’d)

EL-226

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