(Ex. Electronic Search Type)
HINT: Adjustment of the antenna trimmer.
(1) Fully lengthen the antenna.
(2) With the volume and tone at maximum, turn the dial
to around 1,400 kHz where there is no reception.
(3) Adjust the trimmer to where static is loudest. 2. FAINT RECEPTION
Possible causes:
wIncorrectly adjusted antenna trimmer
wDefective antenna or antenna cable
wDefective speaker
wDefective radio
Temporarily install another speaker.
Okay?
Temporarily install another antenna.
Okay?Inspect antenna, cable and booster
and repair as necessary. Are both reception and static faint
with antenna fully lengthened?
Adjust AM antenna trimmer.
(See illustration.)Replace speaker.
Replace radio.
Replace radio.
TEST
Ye sYe s
± BODY ELECTRICAL SYSTEMAudio SystemBE±99
3. BAD SOUND QUALITY
(a) Sound quality bad when radio played.
Possible causes:
wMuItipath interference of excessive interception
wTuner dial not synchronized with station
wDefective antenna or antenna cable
wSpeaker improperly installed
wVibration sound from components near speaker
wDefective speaker
wDefective radio
(b) Sound quality bad when tape player played.
Possible causes:
wBad tape
wDirty head
wIncorrectly installed speaker
wVibration noise from around speaker
wDefective speaker
wDefective tape player HINT: FM distortion tends to increase sharply if the tun-
er is not synchronized.
FM multipath interference and excessively strong
AM reception near broadcasting station which
cannot be avoided in most cases.
Is there a vibration sound
corning from components
near speaker?Inspect antenna, cable and boost-
er, and repair as necessary.Is sound quality bad in
certain areas only?
Is speaker installed correctly
(not loose or too tight)?Temporarily install another
antenna. Okay?
Properly install. If speaker
frame is bent, replace. Is tuner dial properly synchronized?
Temporarily
install another
speaker. Okay? Properly synchronize.Proceed to Test 2.
Replace radio.Replace
speaker.
TEST 2TEST 1
Repair.
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
± BODY ELECTRICAL SYSTEMAudio SystemBE±100
HINT: Head cleaning procedure.
(1) Raise the cassette door with your finger. Next, using
a pencil or like object, push in the guide as shown.
(2) Using a cleaning pen or cotton applicator soaked in
alcohol, clean the head surface, pinch rollers and
capstans.
(3) Push in the ºejectº button.
4. DEFECTIVE AUTO±SEARCH MECHANISM
Manual search possible but automatic search mechanism
does not function or does not stop at all receivable sta-
tions.
Possible causes:
wPoor search sensitivity (SENS button)
wDefective radio
Check if desired broadcast can
actually be received in the area.
If receivable, replace radio. Is desired broadcast receivable when
button is at ºDISTANTº position? Clean head. Does sound improve?
(See note for cleaning procedure.)Does sound improve with another
tape?
Is speaker correctly installed
(loose or too tight)?Does vibration sound
come from around
speaker?
Install correctly. If speaker
frame is bent, replace.Temporarily install
another speaker.
Okay?
Does needle move when
search button is pushed?Replace tape player. Proceed to Test 2.
Replace radio.Replace
speaker.
TEST
2
Tape bad TEST 1
Repair.
TEST
Ye s Ye s
Ye s Ye s
Ye s
Ye s
Ye s
± BODY ELECTRICAL SYSTEMAudio SystemBE±101
IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM, CB, ETC.)
The ECU has been designed so that it will not be affected ±by out-
side interference.
However, if your vehicle is equipped with a CB radio transceiver,
etc. (even one with about 10 W output), it may, at times, have an
affect upon ECU operation, especially if the antenna and feeder are
installed nearby.
Therefore, observe the following precautions:
1. Install the antenna as far as possible from the ECU. The
ECU is located under the radio so the antenna should be installed
at the rear side of the vehicle.
2. Keep the antenna feeder as far away as possible from the
ECU wires ± at least 20 cm (7.87 in.) ± and, especially, do not wind
them together.
3. Check that the feeder and antenna are properly adjusted.
4. Do not equip your± vehicle with a powerful mobile radio system.
5. Do not open the cover or the case of the ECU unless absolutely nec-
essary. (If the IC terminals are touched, the IC
may be destroyed by static electricity.)
AIR INDUCTION SYSTEM
1. Separation of the engine oil dipstick, oil filler cap, PCV hose,
etc. may cause the engine to run out¿¿ tune.
2. Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will allow air suction and cause the engine to run out of tune.
ELECTRONIC CONTROL SYSTEM
1. Before removing EFI wiring connectors, terminals, etc., first discon-
nect the power by either turning the ignition switch
OFF or disconnecting the battery terminals.
2. When installing the battery, be especially careful not to
incorrectly connect the positive (+) and negative (±) cables.
3. Do not permit parts to receive a severe impact during removal or
installation. Handle all EFI parts carefully, especially the ECU.
4. Do not be careless during troubleshooting as there are numerous
transistor circuits and even slight terminal contact can cause fur-
ther troubles.
5. Do not open the ECU cover.
6. When inspecting during rainy weather, take care to prevent
entry of water. Also, when washing the engine compartment, pre-
vent water from getting on the ER parts and wiring connectors.
7. Parts should be replaced as an assembly.
± EFI SYSTEMInspection PrecautionsFI±6
