No sound/no display with auxiliary video unit inputs

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first BATTERY TEST ).
Check that the auxiliary device is properly connected, and has fresh batteries or power source connected.
Do not connect an RCA type shorting plug with the RES auxiliary jack assembly 14P connector, or system damage may occur.
You need to switch the audio-navigation unit REAR PWR button on for the rear display, remote controls, and sound to operate.

Connect an auxiliary video source, and check the volume/display operation.
Does the display operate properly and does the audio sound normal?

YES -Operation is normal at this time.

NO -Go to step 2.
Substitute a known-good auxiliary video unit, and recheck.
Does the auxiliary video unit operate properly?

YES -Original auxiliary video unit faulty.

NO -Go to step 3.
Remove the RES auxiliary jack assembly Check that the RES auxiliary jack assembly is properly connected.
Is the RES auxiliary jack assembly connected properly?

YES -Go to step 4.

NO -Reconnect the connector, and recheck.
Turn the ignition switch to LOCK (0).
Disconnect these items:
- Audio-Navigation unit connector C (28P)
- Audio-Navigation unit connector E (16P)
- RES auxiliary jack assembly 14P connector

Check for continuity between body ground and audio-navigation unit connector C (28P) and connector E (16P) according to the table.

Audio-Navigation unit connector	Wire color
C1	GRN
C2	PNK
C15	BLU
E2	LT BLU
E9	PUR

Fig 1: Checking Continuity Between Body Ground And Audio-Navigation Unit Connector C (28P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Checking Continuity Between Body Ground And Audio-Navigation Unit Connector E (16P)

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-navigation unit and the RES auxiliary jack assembly. Replace the affected shielded harness.

NO -Go to step 7.

Check for continuity between the terminals of audio-navigation unit connector C (28P) and connector E (16P) according to the table.

From terminal	To terminals
C1 (GRN)	C2(PNK), C15(BLU), C17 (BRN)
C2 (PNK)	C15(BLU), C17(BRN)
C15(BLU)	C17(BRN)
E1 (BRN)	E2(LT BLU), E9(PUR)
E2 (LT BLU)	E9 (PUR)

Fig 3: Checking Continuity Between Terminals Of Audio-Navigation Unit Connector C (28P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Checking Continuity Between Terminals Of Audio-Navigation Unit connector E (16P)

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 RES auxiliary jack assembly. Replace the affected shielded harness.

NO -Go to step 8.

Check for continuity between audio-navigation unit connector C (28P), connector E (16P), and RES auxiliary jack assembly 14P connector according to the table.

Audio-Navigation unit connector	RES auxiliary jack assembly connector	Wire color
C1	No. 10	GRN
C2	No. 11	PNK
C15	No. 12	BLU
E2	No. 4	LT BLU
E9	No. 9	PUR

Fig 5: Identifying Audio-Navigation Unit Connector C (28P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 6: Identifying Audio-Navigation Unit Connector E (16P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 7: Identifying RES Auxiliary Jack Assembly 14P Connector

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 RES auxiliary jack assembly. Replace the affected shielded harness.

Connect an RCA type shorting plug to each audio input (R and L).
NOTE: Do not connect the RCA type shorting plug with the RES auxiliary jack assembly 14P connected, or system damage may occur.
Check for continuity between RES auxiliary jack assembly 14P connector terminals No. 10 and No. 12.

Fig 8: Checking Continuity Between 14P Connector Terminals No. 10 And No. 12
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 11.

NO -Replace the RES auxiliary jack assembly
Remove the RCA type shorting plug(s) and check the same terminals again for continuity.
Is there continuity?

YES -Replace the RES auxiliary jack assembly

NO -Substitute a known-good audio-navigation unit AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ). If the symptom is still present, replace the rear controller and screen