Nissan Frontier D22. Manual - part 137
AUDIO
AV-15
C
D
E
F
G
H
I
J
L
M
A
B
AV
AUDIO UNIT (CREW CAB WITH AMPLIFIER)
Inspection
EKS006XA
SPEAKER
1.
Disconnect speaker harness connector.
2.
Measure the resistance between speaker terminals + and –.
●
The resistance should be 2 - 4
Ω.
3.
Using jumper wires, momentarily connect a 9V battery between speaker terminals + and –.
●
A momentary hum or pop should be heard.
ANTENNA
1.
Using a jumper wire, clip an auxiliary ground between antenna and body.
●
If reception improves, check antenna ground (at body surface).
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. 18, located in fuse block (J/B)].
Turn ignition switch ON and verify that battery positive
voltage is present at terminal 10 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. 30A fusible link
2. Audio amplifier ground
3. Audio amplifier
1. Check 30A fusible link (letter h. located in fuse and fus-
ible link box). Verify battery positive voltage is present
at terminal 5 and 12.
2. Check harness continuity between audio amplifier ter-
minals 4 and 11, and ground.
3. Remove audio amplifier for repair.
Audio unit presets are lost
when ignition switch is
turned OFF.
1. 15A fuse
2. Audio unit
1. Check 15A fuse (No. 41, located in fuse and fusible
link box) and verify that battery positive voltage is
present at terminal 6 of audio unit.
2. Remove audio unit for repair.
Individual speaker is noisy
or inoperative.
1. Each speaker
2. Output circuit to each speaker
1. Check speaker.
2. Check the output circuit to each speaker
–
between audio unit and audio amplifier
–
between audio amplifier and each speaker
Audio unit stations are
weak or noisy.
1. Antenna
2. Poor audio unit ground
3. Audio unit
1. Check antenna.
2. Check audio unit ground.
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 defog-
ger noise suppressor condenser
4. Generator
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 generator.
5. Check ignition coil and secondary wiring.
6. 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.
Steering wheel audio con-
trol switch does not oper-
ate.
1. Steering wheel audio control switch
2. Audio unit output
3. Steering wheel audio control switch circuit
4. Audio unit
1. Check steering wheel audio control switch, refer to
“STEERING WHEEL AUDIO CONTROL SWITCH
RESISTANCE CHECK”, $$$$$:NEEL0083S06.
2. Check audio unit output voltage.
3. Check harness between audio unit and steering
switch.
4. Remove audio unit for repair.