Audio system information does not display on the audio-HVAC display unit (with premium audio system)

NOTE:

Check the vehicle battery condition first
Check the connectors for poor connections or loose terminals

Remove the audio-HVAC display unit (see AUDIO-HVAC DISPLAY UNIT REMOVAL/INSTALLATION )
Check the connections at the audio-HVAC display unit 12P connector and audio unit connector B (20P)
Are the connectors and terminals connected properly?

YES -Go to step 3

NO -Repair the connection, and recheck
Disconnect the audio-HVAC display 12P connector
Turn the ignition switch to ON (II)
Measure the voltage between audio-HVAC display unit 12P connector terminals No. 5 and No 6 and body ground individually

Fig 1: Measuring Voltage Between Audio-HVAC Display Unit 12P Connector Terminals No. 5 And No 6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 6

NO -Repair open in the wire between the No 15 (10 A) fuse in the under-hood fuse/relay box and audio-HVAC display unit 12P connector terminal No 6, or repair open in the wire between the No 16 (7 5 A) fuse in the driver's under-dash fuse/relay box and audio-HVAC display unit 12P connector terminal No 5
Measure the voltage between audio-HVAC display unit 12P connector terminal No 9 and body ground

Fig 2: Measuring Voltage Between Audio-HVAC Display Unit 12P Connector Terminal No 9 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0 1V?

YES -Go to step 7

NO -Repair open in the wire between audio-HVAC display 12P connector terminal No 9 and body ground (G401) (see AUDIO WIRE HARNESS (WITH NAVIGATION SYSTEM) )
Turn the ignition switch to LOCK (0)
Disconnect audio unit connector B (20P)

Check for continuity between audio unit connector B (20P) and the audio-HVAC display unit 12P connector according to the table.

WIRE CONNECTOR REFERENCE CHART

Audio unit connector	Audio-HVAC display unit connector	Wire color
B6	2	RED
B7	1	GRN
B17	4	BLU

Fig 3: Identifying Audio Unit Connector B (20P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Identifying Audio-HVAC Display Unit 12P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 10

NO -Repair open in the wire(s) between the audio unit and the audio-HVAC display unit Replace the affected shielded harness

Check for continuity between the terminals of the audio-HVAC display unit 12P connector and body ground according to the table Then check for continuity between the same terminals listed in the table and audio unit connector B (20P) terminal No 16

WIRE CONNECTOR REFERENCE CHART

Audio-HVAC display unit connector	Wire color
1	GRN
2	RED
4	BLU

Fig 5: Identifying Audio-HVAC Display Unit 12P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to body ground in the wire(s) between the audio unit and the audio-HVAC display unit Replace the affected shielded harness

NO -Go to step 11

Check for continuity between the terminals of audio unit connector B (20P) according to the table

TERMINAL REFERENCE CHART

From terminal	To terminal
B6 (RED)	B7 (GRN)

Fig 6: Checking Continuity Between Terminals Of Audio Unit Connector B (20P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity between any of the terminals?

YES -Repair short in the wire(s) between the audio unit and the audio-HVAC display unit Replace the affected shielded harness

NO -Substitute a known-good audio-HVAC display unit (see AUDIO-HVAC DISPLAY UNIT REMOVAL/INSTALLATION ), and recheck If the symptom/indication goes away, replace the original audio-HVAC display unit (see AUDIO-HVAC DISPLAY UNIT REMOVAL/INSTALLATION ) If the symptom is still present, substitute a known-good audio unit (see WITH PREMIUM AUDIO SYSTEM ), and recheck If the symptom/indication goes away, replace the original audio unit (see WITH PREMIUM AUDIO SYSTEM )