Fig. 91: Measuring Resistance Between Test Point Audio-Navigation Unit Connector B (20P)
No. 20 (BLK) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there less than 0.2 V?
YES : REPLACE THE AUDIO-NAVIGATION UNIT .
NO : Repair an open or high resistance in the wire(s) between the audio-navigation unit and body ground
(G502) and/or body ground (G503).
AUXILIARY INPUT SOUND IS LOW OR CANNOT BE HEARD (WITH NAVIGATION)
Fig. 92: Audio System Symptom Troubleshooting Flowchart - Auxiliary Input Sound Is Low Or Cannot
Be Heard
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
ο¬
ο¬
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CHECK THE VEHICLE BATTERY CONDITION FIRST .
Use auxiliary stereo cables with 3.5 mm ends only.
Auxiliary accessories may be played on the audio-navigation unit using
the auxiliary input.
ο¬
Check the connectors for poor connections or loose terminals.
1. Problem verification:
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1. Turn the ignition switch to ON (II).
2. Turn on the audio system, and connect an auxiliary accessory to the auxiliary input jack.
3. Press the AUDIO button, and check the auxiliary audio source sound.
Is the sound normal?
YES : Intermittent failure, the system is OK at this time.
NO : The failure is duplicated, go to step 2.
2. Determine possible failure area (volume level, others):
ο‘
1. Make sure the auxiliary accessory volume is set to high.
Is the volume set to high?
YES : Go to step 3.
NO : Raise the auxiliary accessory volume to high. Make sure the audio-navigation unit volume is turned
down before rechecking.
3. Determine possible failure area (auxiliary audio accessory, others):
ο‘
1. Substitute a known-good auxiliary audio accessory and/or auxiliary stereo cable, and recheck.
Does the auxiliary audio accessory operate properly?
YES : Original auxiliary audio accessory or auxiliary stereo cable is faulty.
NO : Go to step 4.
4. Shorted wire check (AUX lines):
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1. Turn the ignition switch to LOCK (0).
2. Disconnect the following connectors.
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Audio-navigation unit connector E (16P)
Auxiliary jack assembly 5P connector
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3. Check for continuity between these test points and body ground individually.
Test condition IG LOCK (0)
Audio-navigation unit connector E (16P): disconnected
Auxiliary jack assembly 5P connector: disconnected
Connector
Test circuit
Terminal
AUX R CH No. 6 (RED)
AUX SGND No. 7 (BLK)
Audio-navigation unit connector E (16P) AUX L CH No. 8 (WHT)
AUX GND No. 15 (LT GRN)
AUX DET No. 16 (LT BLU)
Fig. 93: Identifying 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 auxiliary
jack assembly. Repair or replace the affected harness.
NO : The AUX wires are not shorted to ground. Go to step 5.
5. Shorted wire check (SH AUX line to another lines):
ο‘
1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Audio-navigation unit connector E (16P): disconnected
Auxiliary jack assembly 5P connector: disconnected
Test circuit AUX R CH, SH AUX
Test point 1 Audio-navigation unit connector E (16P) No. 6 (RED)
Test point 2 Audio-navigation unit connector E (16P) No. 14 (GRY)
Test circuit AUX L CH, SH AUX
Test point 1 Audio-navigation unit connector E (16P) No. 8 (WHT)
Test point 2 Audio-navigation unit connector E (16P) No. 14 (GRY)
Fig. 94: Checking For Continuity Between Test Point Audio-Navigation Unit Connector E
(16P) No. 8 (WHT) And No. 14 (GRY)
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 auxiliary jack assembly.
Replace the affected shielded harness.
NO : The SH AUX wire is OK. Go to step 6.
6. Shorted wire check (AUX SGND line to another lines):
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1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Audio-navigation unit connector E (16P): disconnected
Auxiliary jack assembly 5P connector: disconnected
Test circuit AUX R CH, AUX SGND
Test point 1 Audio-navigation unit connector E (16P) No. 6 (RED)
Test point 2 Audio-navigation unit connector E (16P) No. 7 (BLK)
Test circuit AUX L CH, AUX SGND
Test point 1 Audio-navigation unit connector E (16P) No. 8 (WHT)
Test point 2 Audio-navigation unit connector E (16P) No. 7 (BLK)
Fig. 95: Checking For Continuity Between Test Point Audio-Navigation Unit Connector E
(16P) No. 8 (WHT) And No. 7 (BLK)
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 auxiliary jack assembly.
Replace the affected shielded harness.
NO : The AUX SGND wire is not shorted. Go to step 7.
7. Open wire check (AUX line):
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1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Audio-navigation unit connector E (16P): disconnected
Auxiliary jack assembly 5P connector: disconnected
Test
circuit
Test point 1: Audio-navigation unit
connector E (16P)
Test point 2: Auxiliary jack assembly
5P connector
No. 6 (RED)
No. 1 (RED)
AUX R
CH
AUX
SGND
AUX L
CH
No. 7 (BLK)
No. 8 (WHT)
No. 3 (BLK)
No. 2 (WHT)
AUX
GND
AUX DET
No. 15 (LT GRN)
No. 16 (LT BLU)
No. 4 (LT GRN)
No. 5 (LT BLU)
Fig. 96: Identifying Audio-Navigation Unit Connector E (16P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 97: Identifying Auxiliary Jack Assembly 5P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The AUX wires are OK. Go to step 8.
NO : There is an open in the wire(s) between the audio-navigation unit and the auxiliary jack assembly.
Repair or replace the affected harness.
8. Audio-navigation unit check:
ο‘
1. SUBSTITUTE A KNOWN-GOOD AUXILIARY JACK ASSEMBLY , and recheck.
Does the symptom go away?
YES : Replace the original auxiliary jack assembly.
NO : REPLACE THE AUDIO-NAVIGATION UNIT .
AUXILIARY INPUT SOUND IS LOW OR CANNOT BE HEARD (WITHOUT NAVIGATION)
Fig. 98: Audio System Symptom Troubleshooting Flowchart - Auxiliary Input Sound Is Low Or Cannot
Be Heard
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
ο¬
ο¬
ο¬
CHECK THE VEHICLE BATTERY CONDITION FIRST .
Use auxiliary stereo cables with 3.5 mm ends only.
Auxiliary accessories may be played on the audio unit using the auxiliary
input.
ο¬
Check the connectors for poor connections or loose terminals.
1. Problem verification:
1. Turn the ignition switch to ON (II).
ο‘
2024 Honda CR-V Owner's Manual
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2021 Honda CR-V Owner's Manual
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