Glass Antenna

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: When wiping off dirt from the glass, pay attention to the followings to avoid damaging the heat wire.

Use soft and dry cloth.
Wipe the glass along the wires.

Inspection procedure of the antenna differs in its print pattern.

Fig 1: Glass Antenna

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Type A

Disconnect the ground cable from battery.
Remove the rear gate trim. Ref. to REMOVAL , Rear Gate Trim.
Disconnect the antenna harness connector and antenna terminal.
Prepare extension harnesses (A), (B).

Fig 2: Extension Harnesses (A), (B)
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Connect extension harness (A) to rear defogger harness terminal (power supply side) and antenna terminal.

Fig 3: Extension Harness, Rear Defogger Harness Terminal (Power Supply Side) And Antenna Terminal
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Connect extension harness (B) to rear defogger harness terminal (ground side).
Fix the other end of extension harness (B) to the end of plaid antenna pattern using adhesive tape.

Fig 4: Fixing End Of Extension Harness (B) To End Of Plaid Antenna Pattern Using Adhesive Tape
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Connect the ground cable to battery.
Turn the ignition switch to ON.
Turn the rear defogger switch to ON.
Wind a piece of aluminum foil around the tip of tester probe and press foil against the antenna wire with your finger.

Fig 5: Pressing Foil Against Antenna Wire
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Measure the voltage near point (a) and (b) using a voltmeter.

Fig 6: Measuring Voltage Near Point (A) And (B) Using Voltmeter

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MEASURED VOLTAGE REFERENCE CHART

	Measured voltage	Criteria
(a)	Approx. 3 V (standard)	Normal operation
(a)	Approx. 6 V or 0 V	Open
(b)	Approx. 9 V (standard)	Normal operation
(b)	Approx. 12 V or 6 V	Open

NOTE: Measured point (a)

If the measured value is 6 V, heat wire is open between heat wire center and positive (+) probe.
If it is 0 V, the circuit is open between antenna wire center and ground.

Measured point (b)

If the measured value is 12 V, heat wire is open between heat wire center and positive (+) probe.
If it is 6 V, the circuit is open between antenna wire center and ground.

Place the positive (+) and negative (-) probes to the positive end of the section where there is presumably an open circuit from step 12).
Move the negative (-) probe slowly along the antenna wire to find the point where the voltage changes from 0 V.

Fig 7: Checking Continuity Between Antenna Wires
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When locating the open point in the antenna wire, repair it. Ref. to REPAIR , Antenna.

Type B

Measure the resistance between the antenna terminal and each antenna wire.

Fig 8: Measuring Resistance Between Antenna Terminal And Each Antenna Wire

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Disconnect the ground cable from battery.
Wind a piece of aluminum foil around the tip of tester probe and press foil against the antenna wire with your finger.

Fig 9: Pressing Foil Against Antenna Wire
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To locate the broken point, move the probe along antenna wire.

Fig 10: Moving Probe Along Antenna Wire
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NOTE: If an antenna wire is OK, resistance will be less than 20 Ω.
If an antenna wire is broken, resistance will be more than 1 MΩ.
When locating the open point in the antenna wire, repair it. Ref. to REPAIR , Antenna.