Auxiliary Input Sound Is Low Or Cannot Be Heard (With Navigation)

WARNING: This page is about a different car, the 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. 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.
Use auxiliary stereo cables with 3.5 mm ends only.
Auxiliary accessories may be played on the audio-navigation unit using the auxiliary input.

Turn the ignition switch to ON (II).
Turn on the audio-navigation unit, and connect the customer's auxiliary accessory device to the auxiliary input jack.
Check the volume operation. Is the sound normal?
YES - Operation is normal at this time.

NO - Go to step 4.
Make sure the customer's auxiliary accessory device volume is set to high.
Is the volume set to high?

YES - Go to step 5.

NO - Raise the auxiliary accessory device volume to high. Make sure the audio-navigation unit volume is turned down before retesting.
Connect the customer's auxiliary accessory device to a known good vehicle (same year/trim), and check the operation of the device.
Does the customer's auxiliary audio accessory operate properly?

YES - Go to step 6.

NO - Customer's auxiliary audio accessory or auxiliary stereo cable if faulty.
Turn the ignition switch to LOCK (0).
Remove the auxiliary jack assembly (see SPEAKER TEST/REPLACEMENT ), and check that the auxiliary jack assembly is properly connected.
Is the auxiliary jack assembly connected properly?

YES - Go to step 8.

NO - Reconnect the connector, and recheck the function.
Disconnect auxiliary jack assembly 5P connector.
Disconnect audio-navigation unit connector B (24P).

Check for continuity between body ground and audio-navigation unit connector B (24P) according to the table.

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

Audio-navigation unit connector	Wire color
B3	BRN
B13	YEL
B14	GRN
B15	WHT

Fig 1: Checking Continuity Between Body Ground And Audio-Navigation Unit Connector B (24P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Short to body ground in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Replace the affected shielded harness.

NO - Go to step 11.

Check for continuity between audio-navigation unit connector B (24P) according to the table.

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

From terminal	To terminals
B3(BRN)	B2(GRY), B13(YEL), B14(GRN)
B2 (GRY)	B13(YEL), B14(GRN)
B13 (YEL)	B14(GRN)

Fig 2: Checking Continuity Between Audio-Navigation Unit Connector B (24P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Short in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Replace the affected shielded harness.

NO - Go to step 12.

Check for continuity between audio-navigation unit connector B (24P) and auxiliary jack assembly 5P connector according to the table.

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

Audio-navigation unit connector	Auxiliary jack assembly connector	Wire color
B1	3	BLU
B3	2	BRN
B13	4	YEL
B14	5	GRN
B15	1	WHT

Fig 3: Checking Continuity Between Audio-Navigation Unit Connector B (24P) And Auxiliary Jack Assembly 5P Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Checking Continuity Between Audio-Navigation Unit Connector And Auxiliary Jack Assembly 5P Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Substitute a known-good auxiliary jack assembly and recheck. If the symptom/indication goes away, replace the original auxiliary jack assembly. If the symptom/indication is still present, replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).

NO - Open in the wire(s) between audio-navigation unit and auxiliary jack assembly. Replace the affected shielded harness.