Audio system information does not display on the audio-navigation switch panel display (with navigation)

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first (see BATTERY TEST )
Check the connectors for poor connections or loose terminals

Remove the audio-navigation switch panel (see AUDIO-NAVIGATION SWITCH PANEL REMOVAL/INSTALLATION )
Check the connections at the audio-navigation switch panel 24P connector and audio-navigation unit connector F (12P)
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-navigation switch panel 24P connector terminals No 21 and No 22 and body ground individually

Fig 1: Measuring Voltage Between Audio-Navigation Switch Panel 24P Connector Terminals No 21 And No 22 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-navigation switch panel 24P connector terminal No 22, or repair open in the wire between the No 16(7 5 A) fuse in the driver's under-dash fuse/relay box and the audio-navigation switch panel 24P connector terminal No 21
Measure the voltage between audio-navigation switch panel 24P connector terminal No 10 and body ground

Fig 2: Measuring Voltage Between Audio-Navigation Switch Panel 24P Connector Terminal No 10 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-navigation switch panel 24P connector terminal No 10 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-navigation unit connector F (12P)

Check for continuity between audio-navigation unit connector F (12P) and the audio-navigation switch panel 24P connector according to the table

AUDIO-NAVIGATION SWITCH PANEL CONNECTOR REFERENCE CHART

Audio-navigation unit connector	Audio-navigation switch panel connector	Wire color
F7	16	BRN
F1	15	YEL
F8	3	BLU

Fig 3: Identifying Audio-Navigation Unit Connector F (12P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Identifying Audio-Navigation Switch Panel 24P 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-navigation unit and the audio-navigation switch panel Repair or replace the affected shielded harness

Check for continuity between the terminals of the audio-navigation switch panel 24P connector and body ground according to the table

AUDIO-NAVIGATION SWITCH PANEL CONNECTOR REFERENCE CHART

Audio-navigation switch panel connector	Wire color
3	BLU
15	YEL
16	BRN

Fig 5: Identifying Audio-Navigation Switch Panel 24P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -There is a short in the wires between the audio-navigation unit and the audio-navigation switch panel Repair or replace the affected shielded harness

NO -Go to step 10

Check for continuity between the terminals of audio-navigation switch panel 24P connector according to the table

TERMINAL REFERENCE CHART

From terminal	To terminals
4 (GRY)	15 (YEL), 16 (BRN)
15 (YEL)	16 (BRN)

Fig 6: Identifying Audio-Navigation Switch Panel 24P Connector 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-navigation unit and the audio-navigation switch panel Replace the affected shielded harness

NO -Substitute a known-good audio-navigation switch panel (see AUDIO-NAVIGATION SWITCH PANEL REMOVAL/INSTALLATION ), and recheck If the symptom/indication goes away, replace the original audio-navigation switch panel.If the symptom is still present, substitute a known-good audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit