Audio-HVAC subdisplay unit does not work properly

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, and 2006 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Always make sure that the correct DVD color and version are installed.
Check any official Honda service website for more service information about the navigation system.
Check and repair all CAN DTCs before doing this troubleshooting.

Turn the ignition switch to LOCK (0), and then back ON (II), then observe if the navigation system boots-up with the Acura Globe Screen.
YES - Go to step 2.

NO - See the navigation system symptom troubleshooting for The Honda Globe Screen appears every time the vehicle is started.
Operate the audio system.
Does the audio information display properly?

YES - Go to step 3.

NO - See the audio system symptom troubleshooting for Audio system information does not display on the display panel or audio-HVAC subdisplay unit.
Operate the climate control system.
Does the climate information display properly?

YES - Check the connections at the audio-HVAC subdisplay unit, display panel control unit and audio unit. Then recheck the function.

NO - Go to step 4.
Turn the ignition switch to LOCK (0).
Disconnect audio-HVAC display panel connector C (10P) and the audio-HVAC subdisplay unit connector.

Check for continuity between audio-HVAC display panel connector C (10P) and the audio-HVAC subdisplay unit connector according to the table.

CONNECTOR TERMINALS REFERENCE

Audio-HVAC display panel connector C (10P)	Audio-HVAC Subdisplay Unit connector	Wire Color
C1	1	BLK
C2	2	BLU
C4	4	YEL
C5	5	PUR
C6	6	ORN
C7	7	BLU
C8	8	GRY
C9	9	RED
C10	10	GRN

Fig 1: Checking Continuity Between Audio-HVAC Display Panel (10P) And Audio-HVAC Subdisplay Unit Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 7.

NO - Open in the wire(s). Check for poor connections or loose terminals at the audio-HVAC display panel and audio-HVAC subdisplay unit. If the connections are OK, replace the affected shielded harness.

Check for continuity between audio-HVAC display panel connector C (10P) and the audio-HVAC subdisplay unit connector according to the table.

CONNECTOR TERMINALS REFERENCE

Audio-HVAC display panel connector C (10P)	Wire Color
C1	BLK
C2	BLU
C4	YEL
C5	PUR
C6	ORN
C7	BLU
C8	GRY
C9	RED
C10	GRN

Fig 2: Identifying Audio-HVAC Display Panel 10P Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Short in the wire(s). Replace the affected shielded harness.

NO - Go to step 8.

Start the engine.

Measure the voltage between audio-HVAC display panel connector C (10P) and body ground according to the table.

CONNECTOR TERMINALS REFERENCE

Audio-HVAC display panel connector C (10P)	Wire Color
C1	BLK
C2	BLU
C4	YEL
C5	PUR
C6	ORN
C7	BLU
C8	GRY
C9	RED
C10	GRN

Fig 3: Identifying Audio-HVAC Display Panel 10P Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.1V or more?

YES - Short in the wire(s). Replace the affected shielded harness.

NO - Substitute these units one at a time, in the order listed with know-good units. Restest after each unit substitution. Replace the unit that resolves the problem:

Audio-HVAC Subdisplay Unit
Navigation Unit
XM Receiver Unit
Center Panel Control Unit
Audio Unit