Audio system information does not display on the audio-HVAC display unit (without navigation)

NOTE:

Check the vehicle battery condition first (see BATTERY TEST )
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 D (20P)
Are the connectors and terminals connected properly?

YES -Go to step 3

NO -Repair the connection, and recheck
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
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 5

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 0.2 V?

YES -Go to step 6

NO -Repair open or high resistance in the wire between audio-HVAC display 12P connector terminal No 9 and body ground (G501) (see AUDIO WIRE HARNESS )
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
Disconnect audio unit connector D (20P)

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

AUDIO-HVAC DISPLAY UNIT CONNECTOR REFERENCE CHART

Audio unit connector	Audio-HVAC display unit connector	Wire color
D6	2	BRN
D7	1	YEL
D17	4	BLU

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 9

NO -There is an 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 unit connector D (20P) and body ground according to the table

AUDIO UNIT CONNECTOR REFERENCE CHART

Audio unit connector	Wire color
D6	BRN
D7	YEL
D17	BLU

Fig 5: Identifying Audio Unit Connector D (20P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -There is a short to body ground in the wire(s) between the audio unit and the audio-HVAC display unit Repair or replace the affected shielded harness

NO -Go to step 10

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

TERMINAL REFERENCE CHART

From terminal	To terminals
6 (BRN)	7 (YEL), 16 (GRY)
7 (YEL)	16 (GRY)

Fig 6: Identifying Audio Unit Connector D (20P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity between any of the terminals?

YES -There is a short in the wires 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. If the symptom/indication is still present, replace the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).