Volume does not change (with navigation) Acura TL IV

Volume does not change (with navigation)

Note. Check the vehicle battery condition first (see BATTERY TEST ) Check the connectors for poor connections or loose terminals Set the fader and balance positions to the center

Scheme 124

Scheme 125

Scheme 126

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
2. Turn on the audio-navigation unit, and check for sound in each mode (AM, FM, XM, and CD) Is the sound normal? YES -Go to step 3 NO -Go to Sound Quality Diagnosis (see «SOUND QUALITY DIAGNOSIS»(/acura/tl/iv-2008-2011/remont/entertainment-systems/#audio-system__sound-quality-diagnosis) ) or no sound is heard from speaker(s) (display is normal) (see «NO SOUND IS HEARD FROM THE SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION)»(/acura/tl/iv-2008-2011/remont/entertainment-systems/#audio-system__no-sound-is-heard-from-the) )
3. Operate the volume knob to see if the volume changes Does the volume change? YES -Operation is normal NO -Go to step 4
4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
5. Disconnect the audio switch panel 24P connector and audio-navigation unit connector F (12P)
6. Check for continuity between the audio-navigation switch panel 24P connector terminals No. 5 and No. 12 and audio-navigation unit connector F (12P) terminals No. 1 and No. 13 respectively. Is there continuity? YES -Go to step 7 NO -There is an open in the wire(s) between the audio-navigation unit and the audio-navigation switch panel Replace the affected shielded harness
7. Check for continuity between 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 1 BLU 13 PNK Is there continuity? YES -There is a short to body ground in the wire(s) between the audio-navigation unit and the audio-navigation switch panel Replace the affected shielded harness NO -Go to step 8
8. Check for continuity between the terminals of audio-navigation switch panel 24P connector according to the table TERMINAL REFERENCE CHART From terminal To terminals 1 (BLU) 2 (GRY), 13 (PNK) 2 (GRY) 13 (PNK) 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 unit (including the HDD) (see «AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/navigation-system/#navigation-system__audio-navigation-unit-removalinstallation) ), and recheck If the symptom-indication goes away, replace the original audio-navigation unit. If the symptom is still present, substitute a known-good audio-navigation switch panel (see «AUDIO-NAVIGATION SWITCH PANEL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/entertainment-systems/#audio-system) ), and recheck If the symptom/indication goes away, replace the original audio-navigation switch panel