Audio System - Poor or no sound with XM radio (Audio-navigation unit does display XM channels) (2016 2017 2018 2019 2020 2021 2022)

Poor or no sound with XM radio (Audio-navigation unit does display XM channels) 

NOTE: 

• Check the vehicle battery condition first .
• Check the radio reception in an open area. Poor reception/interference can be caused by tall buildings, mountains, or high-voltage power lines are nearby.
• Check the connectors for poor connections or loose terminals.

1. Problem verification

   -1. Park the vehicle outside with a clear view of the southern horizon.

   -2. Press the engine start/stop button to select the ON mode.

   -3. Turn on the audio system, and select the XM.

   -4. Select an active XM station.

   Is the audio output from the speakers when playing the XM radio?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   The failure is duplicated, go to step 2.

2. Shorted wire check (TUN AUDIO lines) 1

   -1. Press the engine start/stop button to select the OFF mode.

   -2. Disconnect the following connectors.

   Audio-navigation unit connector E (5P)

   Tuner unit connector A (20P)

   -3. Check for continuity between these test points and body ground individually.

   Test condition	OFF mode
   	Audio-navigation unit connector E (5P): disconnected
   	Tuner unit connector A (20P): disconnected

   Connector	Test circuit	Terminal
   Tuner unit connector A (20P)	TUN AUDIO L-	No. 3 (WHT)
   	TUN AUDIO R-	No. 4 (RED)
   	TUN AUDIO L+	No. 13 (GRN)
   	TUN AUDIO R+	No. 14 (BLK)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   There is a short to body ground in the wire(s) between the audio-navigation unit and the tuner unit. Replace the affected shielded harness.

   NO 

   The TUN AUDIO wires are not shorted to ground. Go to step 3.

3. Shorted wire check (TUN AUDIO lines) 2

   -1. Check for continuity between test points 1 and 2.

   Test condition	OFF mode
   	Audio-navigation unit connector E (5P): disconnected
   	Tuner unit connector A (20P): disconnected

   Test circuits	Connector: Tuner unit connector A (20P)
   	Test point 1	Test points 2
   TUN AUDIO L- to TUN AUDIO R-, TUN AUDIO SH, TUN AUDIO L+, TUN AUDIO R+	No. 3 (WHT)	No. 4 (RED), No. 5 (GRY), No. 13 (GRN), No. 14 (BLK)
   TUN AUDIO R- to TUN AUDIO SH, TUN AUDIO L+, TUN AUDIO R+	No. 4 (RED)	No. 5 (GRY), No. 13 (GRN), No. 14 (BLK)
   TUN AUDIO SH to TUN AUDIO L+, TUN AUDIO R+	No. 5 (GRY)	No. 13 (GRN), No. 14 (BLK)
   TUN AUDIO L+ to TUN AUDIO R+	No. 13 (GRN)	No. 14 (BLK)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity between any of the terminals?

   YES 

   There is a short in the wires between the audio-navigation unit and the tuner unit. Replace the affected shielded harness.

   NO 

   The TUN AUDIO wires are not shorted in the wires. Go to step 4.

4. Open wire check (TUN AUDIO lines)

   -1. Check for continuity between test points 1 and 2.

   Test condition	OFF mode
   	Audio-navigation unit connector E (5P): disconnected
   	Tuner unit connector A (20P): disconnected

   Test circuit	Test point 1:Tuner unit connector A (20P)	Test point 2:Audio-navigation unit connector E (5P)
   TUN AUDIO L-	No. 3 (WHT)	No. 2 (WHT)
   TUN AUDIO R-	No. 4 (RED)	No. 4 (RED)
   TUN AUDIO L+	No. 13 (GRN)	No. 3 (GRN)
   TUN AUDIO R+	No. 14 (BLK)	No. 5 (BLK)

   Courtesy of HONDA, U.S.A., INC.

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The TUN AUDIO wires are OK. Go to step 5.

   NO 

   There is an open in the wire(s) between the audio-navigation unit and the tuner unit. Replace the affected shielded harness.

5. Tuner unit check (substitution)

   -1. Substitute a known-good tuner unit .

   -2. Reconnect all the connectors, and recheck.

   Does the symptom go away?

   YES 

   Replace the original tuner unit.

   NO 

   Replace the audio-navigation unit .