Audio System DTC Troubleshooting: 1702

DTC 1702: XM Antenna Error

NOTE:

	Check the vehicle 12 volt battery condition first.
	This audio DTC sets when there is poor connectors or loose terminals at the XM antenna connector or an open or short in the antenna lead.
	Before you troubleshoot, make sure to follow the General Troubleshooting Information.
	Check the connectors for poor connections or loose terminals.

Problem verification:

Problem verification

?1.	Clear the hard error codes.

?2.	Turn the vehicle to the OFF (LOCK) mode.

?3.	Wait for at least 6 seconds.

?4.	Turn the vehicle to the ON mode.

?5.	Turn on the audio system, and select the XM radio.

?6.	Check for hard error codes.

Is DTC 1702 indicated?


	YES

The failure is duplicated, go to step 2.


	NO

Intermittent failure, the system is OK at this time.?

Determine possible failure area (XM antenna, others):

Determine possible failure area (XM antenna, others)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

Roof antenna connector B (2P)

?3.	Turn the vehicle to the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Roof antenna connector B (2P): disconnected
Test point 1	Roof antenna connector B (2P) No. 1
Test point 2	Body ground

Is there about 5.0 V?


	YES

Replace the roof antenna.?


	NO

Go to step 3.

Shorted wire check (SAT-TER/SAT/TER line):

Shorted wire check (SAT-TER/SAT/TER line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

Audio unit connector N (2P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Roof antenna connector B (2P): disconnected
	Audio unit connector N (2P): disconnected
Test point 1	Roof antenna connector B (2P) No. 1
Test point 2	Body ground

Is there continuity?


	YES

There is a short to body ground in the wire between the roof antenna and the audio unit. Replace the affected antenna lead.?


	NO

The SAT-TER/SAT/TER wire is not shorted to ground. Go to step 4.

Shorted wire check (SAT-TER/SAT/TER line to SH(SAT-TER)/SH(SAT/TER) line):

Shorted wire check (SAT-TER/SAT/TER line to SH(SAT-TER)/SH(SAT/TER) line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Roof antenna connector B (2P): disconnected
	Audio unit connector N (2P): disconnected
Test point 1	Roof antenna connector B (2P) No. 1
Test point 2	Roof antenna connector B (2P) No. 2

Is there continuity?


	YES

There is a short in the wire between the roof antenna and the audio unit. Replace the affected antenna lead.?


	NO

The SAT-TER/SAT/TER wire is not shorted to SH(SAT-TER)/SH(SAT/TER) wire. Go to step 5.

Open wire check (SAT-TER/SAT/TER line):

Open wire check (SAT-TER/SAT/TER line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Roof antenna connector B (2P): disconnected
	Audio unit connector N (2P): disconnected
Test point 1	Audio unit connector N (2P) No. 1
Test point 2	Roof antenna connector B (2P) No. 1

Is there continuity?


	YES

Replace the audio unit.?


	NO

There is an open in the wire between the roof antenna and the audio unit. Replace the affected antenna lead.?