Section 3: Includes Antenna Lead Diagnosis

Section 3 - Antenna Lead Diagnosis

After initial radio diagnosis using internal service functions, use the following procedures:

^ Locate antenna lead/s from radio at system end-point, i.e. diversity box or antenna mast base.

^ Check for proper connection. (follow steps for your type of system).

^ For all systems, locate cable end-point at either diversity box or antenna mast base.

^ Disconnect cable from either diversity box or antenna mast base.

^ Carefully ground center wire in cable to chassis.

If reception returns:

Cable and radio are ok.

If reception does not return:

Problem is located further forward in the system.

For problems forward of the antenna system:

^ Continue with Section 3a.

For problems at antenna system:

^ Skip to Section 3b.

For problems at antenna systems:

Tip:

All checks should be done out doors away from buildings.

Section 3a - Problems forward of antenna system

^ First verify connection at Radio (check for bent or crushed connections and proper fit).

If all connections appear ok:

^ Ground antenna lead at radio or attach external antenna mast to radio unit (check for reception).

If reception returns:

Problem is located between radio and antenna.

^ Check connections near center console.

If connections are OK:

^ Check resistance of cable from end to end.

If More than .4 ohms:

^ Replace cable.

If reception does not return:

^ Replace radio unit.

Section 3b - Problems at antenna system, Diversity Antenna (Touareg, Passat W8)

If concern is only AM poor / no reception:

Locate AM antenna amplifier.

Touareg: located above left side window.

Passat W8: Sedan above rear window.

Passat Wagon: located on left rear window.

^ Check for proper connections at amplifier both from diversity box and to glass.

If connection issue is at glass or on glass:

^ Glass must be replaced.

If connection problem to amplifier:

^ Repair connection (replace cable or amplifier).

If no apparent connection problems:

^ Replace amplifier.

If concern is poor FM reception:

^ Disconnect all amplifiers, tune radio to high-powered station for your area.

^ Connect amplifiers one at a time.

If reception is indicated:

^ Disconnect that amplifier and move on to next amplifier.

If at any point in reconnecting amplifiers there is a loss in reception and there are no connection issues:

^ Replace that amplifier and check again.

If there is no reception change when disconnecting and reconnecting all amplifiers:

^ Replace diversity/antenna selection box.

Jetta / Golf / Passat (non W8) - Antenna system (Amplified Antenna Mast)

^ Check connections at antenna base.

^ Check for corrosion at mounting.

If corrosion is found:

^ Clean mount and apply anti-seize gel to mounting.

If concern is no AM and/or little or poor AM/FM reception:

^ Replace antenna base.