Poor radio reception.I've tried a new aerial mast,no improvement.
CD player sounds fine.
Any ideas? (Passat Est.2003)
Important!
Please give copies to all
your VW Technicians
C 91--99--07
E 1999 Volkswagen of America, Inc.
1
Subject:
Model(s):
Group:
Number:
Date:
AM Radio, Poor Reception
1999, 2000
91
99--07
New Golf, New Jetta, Aug. 2, 1999
New Beetle, Passat
Condition
AM reception is poor.
May be caused by:
? An incorrect antenna mast installed for the
antenna base equipped with the vehicle
? Poor ground at the antenna base or radio
? Poor battery ground to chassis or engine
? Poor antenna cable connection at Radio
? Corrosion at the antenna coaxial connectors
at radio or antenna
Service
Vehicles are equipped with either a Bosch or
a Clarion antenna base mounted on the roof
and (for shipping purposes) the appropriate
matching mast is located in the luggage
compartment.
If radio antenna masts are removed from
vehicles and stored until vehicles are sold,
there is a chance that an incorrect mast can
be installed at the time of delivery.
Note:
Mismatched antenna mast and base will cause
poor AM radio reception.
The antenna base and mast can be identified
visually as follows:
(Cont. on Page 2)91-A260
requires gloss finish antenna mast
57mm
49mm
Bosch
91-A261
requires matte finish antenna mast
61mm
41mm
Clarion
91-A262
Technical Bulletin
Important!
Please give copies to all
your VW Technicians
C 91--99--07
E 1999 Volkswagen of America, Inc.
2
Bosch antenna
? Base (although oval) is more circular in
shape (approx. 57mm x 49mm).
? Made in Germany stamped on underside of
base.
? Two screws on underside of base are
unpainted.
? Requires gloss finish antenna mast.
Clarion antenna
? Base is more oval in shape than Bosch
(approx. 61mm x 41mm).
? Two screws on underside of base are
painted.
? Requires matte finish antenna mast.
If antenna mast matches the antenna base
correctly:
-- Check antenna coaxial cable connections
--arrows-- for corrosion and clean if
necessary (DO NOT apply stabilant). Passat
coaxial cable connection for radio is under
the carpet on right side of tunnel near shifter.
-- Ensure that coaxial cable is firmly seated in
radio (Passat cable connection, see
previous step).
-- Check ground at the antenna below roof
Nut --4-- (torque = 7+1 Nm) must firmly
secure antenna to roof).
(Cont. on Page 3)Technical Bulletin
Important!
Please give copies to all
your VW Technicians
C 91--99--07
E 1999 Volkswagen of America, Inc.
3
-- Check ground for radio behind radio on cross
member (On Passat models as of Nov. 1998
beginning VIN: XE285000 ground for radio is
on right side of center tunnel).
-- Check engine compartment ground, left
side, below battery tray; frombattery GND to
body.
-- Check engine/transmission ground on
transmission, near engine block.
-- If all grounds and antenna mast are OK.
-- Replace antenna and coaxial cable
assembly
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