Infiniti I30 (A33). Manual — part 386
MEL440M
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUDIO
Wiring Diagram — AUDIO — (Cont’d)
EL-213
MEL931N
AUDIO
Wiring Diagram — AUDIO — (Cont’d)
EL-214
Trouble Diagnoses
NHEL0220
AUDIO UNIT
NHEL0220S01
Symptom
Possible causes
Repair order
Audio unit inoperative (no
digital display and no
sound from speakers).
1. 10A fuse
2. Poor audio unit case ground
3. Audio unit
1. Check 10A fuse [No. 1, located in fuse block (J/B)].
Turn ignition switch ON and verify that battery posi-
tive voltage is present at terminal 10 of audio unit.
2. Check audio unit case ground.
3. Remove audio unit for repair.
Audio unit presets are lost
when ignition switch is
turned OFF.
1. 15A fuse
2. Audio unit
1. Check 15A fuse [No. 56, located in fuse block (J/B)]
and verify that battery positive voltage is present at
terminal 6 of audio unit.
2. Remove audio unit for repair.
Audio unit controls are
operational, but no sound
is heard from any speaker.
1. 15A fuse
2. Amp. ON/OFF signal circuit
3. Speaker amp. ground
1. Check 15A fuse [No. 56, located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
27 of speaker amp.
2. Check harness continuity between audio unit terminal
12 and speaker amp. terminal 25.
3. Check harness continuity between speaker amp. ter-
minal 40 and ground.
Individual speaker is noisy
or inoperative.
1. Each speaker
2. Output circuit to each speaker
1. Check speaker.
2. Check the output circuits to each speaker
I
between audio unit and speaker amp.
I
between speaker amp. and each speaker.
Woofer does not operate.
1. Power supply to woofer
2. Amp. ON/OFF signal circuit
3. Speaker amp. ground
4. Output circuit to woofer
1. Check 15A fuse [No. 67, located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
48 of woofer.
2. Check harness continuity between audio unit terminal
12 and woofer terminal 45.
3. Check harness continuity between woofer terminal 47
and ground.
4. Check the output circuits to woofer from speaker
amp.
AM/FM stations are weak
or noisy.
1. Window antenna
2. Audio unit ground
3. Audio unit
1. Check window antenna.
2. Check audio unit ground condition.
3. Remove audio unit for repair.
Audio unit 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. Ignition coil or secondary wiring
5. 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 ignition coil and secondary wiring.
5. Remove audio unit for repair.
Audio unit generates noise
in AM and FM modes with
accessories 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.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUDIO
Trouble Diagnoses
EL-215
Inspection
=NHEL0221
AUDIO UNIT AND AMP.
NHEL0221S01
All voltage inspections are made with:
I
Ignition switch ON or ACC
I
Audio unit ON
I
Audio unit and amps. connected (If audio unit or amp. is removed for inspection, supply a ground to the
case using a jumper wire.)
ANTENNA
NHEL0221S02
Using a jumper wire, clip an auxiliary ground between antenna and body.
I
If reception improves, check antenna ground (at body surface).
I
If reception does not improve, check main feeder cable for short circuit or open circuit.
AUDIO
Inspection
EL-216
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст