Acura CSX. Manual — part 578
*01
SNR9ANDJ10300000000FAAT02
−
−
−
−
−
−
−
−
−
−
Poor AM or FM radio reception or
interference (with navigation)
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
23-29
Symptom Troubleshooting
A
B
NOTE:
• Check the vehicle battery condition first.
• Check for aftermarket accessories plugged into the
vehicle accessory power sockets (including cell
phone).
• Check the connectors for poor connections or loose
terminals.
• Check the radio reception in an open area. Compare it
to a known-good vehicle whenever possible. Poor
reception/interference can be caused by the
following:
– The radio station is far away.
– Atmospheric conditions are unfavorable.
– Tall buildings, mountains, or high-voltage power
lines are nearby.
– Aftermarket metallic wi ndow tint.
1. Turn the ignition switch to ON (II).
2. Do the seek stop test (see page 23-78).
Multipath interference or weak station.
Operation is normal.
Go to step 3.
3. Check if the radio reception/interference is the
same in several locations.
Go to step 4.
Multipath interference or weak station.
Operation is normal.
4. Start the engine.
5. Check the reception/interference.
Check the antenna and radio grounds. If OK,
check the charging system and the ignition
system.
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Remove the right side C-pillar trim (see page 20-75).
8. Check the connections from the AM/FM antenna
amplifier to the window antenna.
Repair the connections, or substitute a
known-good AM/FM antenna amplifier and retest.
If the symptom/condition goes away, replace the
original AM/FM antenna amplifier (see page 23-87).
Go to step 9.
9. With the help of an assistant inside the vehicle,
have the assistant shine a flashlight (A) along each
antenna wire (B). Check from the outside of the
vehicle for any breaks or openings in the antenna
wires (the light shines through).
Repair the window antenna. Go to AM/FM
antenna repair (see page 23-87), or replace the rear
window (see page 20-47).
Go to step 10.
Is the test vehicle within 10 % of the known-good
vehicle?
Is the r eception/ inter f er ence the same?
Is ther e noise ( static or whine) only with the
engine r unning?
Ar e ther e any loose or damaged connections?
Ar e ther e any br eaks or cuts in the antenna?
08/08/21 14:04:37 61SNR030_230_0032
*02
*03
*04
+
+
+
+
−
−
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
YES
NO
23-30
Audio System
AM/FM ANTENNA AMPLIFIER 3P CONNECTOR
ANT
B
AM/FM ANTENNA AMPLIFIER 3P CONNECTOR
ANT
B
NAVIGATION UNIT CONNECTOR G (3P)
AM/FM ANTENNA AMPLIFIER 3P CONNECTOR
ANT
B
ANT
B
10. Remove the navigation unit (see page 23-155).
Check that the antenna lead is properly connected.
Go to step 11.
Reconnect the connector, and recheck the
function.
11. Disconnect the AM/FM antenna lead 3P connector
from the AM/FM antenna amplifier (see page 23-87).
12. Turn the ignition switch to ON (II).
13. Turn on the navigation unit.
14. Measure the voltage between the AM/FM antenna
lead connector terminal No. 3 at the AM/FM
antenna amplifier and body ground.
Go to step 19.
Go to step 15.
15. Turn the ignition switch to LOCK (0).
16. Disconnect navigation unit connector G (3P).
17. Check for continuity between the AM/FM antenna
amplifier 3P connector terminal No. 3 and body
ground.
Repair short to body ground in the wire
between the navigation unit and the AM/FM
antenna amplifier.
Go to step 18.
18. Check for continuity between navigation unit
connector G (3P) terminal No. 3 and the AM/FM
antenna amplifier 3P connector terminal No. 3.
Substitute a known-good navigation unit
(see page 23-155), and recheck.
Repair open in the wire between the
navigation unit and the AM/FM antenna
amplifier.
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Is it connected pr oper ly?
Is ther e batter y voltage?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:04:37 61SNR030_230_0033
*05
*06
*07
*08
−
−
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
YES
NO
23-31
NAVIGATION UNIT CONNECTOR G (3P)
RF IN
NAVIGATION UNIT CONNECTOR G (3P)
RF IN
RF SH
AM/FM ANTENNA AMPLIFIER 3P CONNECTOR
NAVIGATION UNIT CONNECTOR G (3P)
RF SH
RF SH
AM/FM ANTENNA AMPLIFIER 3P CONNECTOR
NAVIGATION UNIT CONNECTOR G (3P)
RF IN
RF IN
19. Turn the ignition switch to LOCK (0).
20. Disconnect navigation unit connector G (3P).
21. Check for continuity between navigation unit
connector G (3P) terminal No. 1 and body ground.
Replace the AM/FM antenna lead and/or
sublead.
Go to step 22.
22. Check for continuity between navigation unit
connector G (3P) terminals No. 1 and No. 2.
Replace the antenna lead and/or sublead.
Go to step 23.
23. Check for continuity between navigation unit
connector G (3P) terminal No. 2 and the AM/FM
antenna amplifier 3P connector terminal No. 2.
Replace the antenna lead and/or sublead.
Go to step 24.
24. Check for continuity between navigation unit
connector G (3P) terminal No. 1 and the AM/FM
antenna amplifier 3P connector terminal No. 1.
Replace the AM/FM antenna amplifier
(see page 23-87), and recheck. If the reception is
still poor, replace the navigation unit (see page
23-155).
Replace the AM/FM antenna lead and/or
sublead.
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Is ther e continuity?
Is ther e continuity?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:04:38 61SNR030_230_0034
*01
SNR9ANJJ10300000000FAAT03
−
−
−
−
−
−
−
−
−
−
Poor AM or FM radio reception or
interference (without navigation)
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
23-32
Audio System
A
A
B
NOTE:
• Check the vehicle battery condition first.
• Check for aftermarket accessories plugged into the
vehicle accessory power sockets (including cell
phone).
• Check the connectors for poor connections or loose
terminals.
• Check the radio reception in an open area. Compare it
to a known-good vehicle whenever possible. Poor
reception/interference can be caused by the
following:
– The radio station is far away.
– Atmospheric conditions are unfavorable.
– Tall buildings, mountains, or high-voltage power
lines are nearby.
– Aftermarket metallic wi ndow tint.
1. Turn the ignition switch to ON (II).
2. Do the seek stop test (see page 23-78).
Multipath interference or weak station.
Operation is normal.
Go to step 3.
3. Check if the radio reception/interference is the
same in several locations.
Go to step 4.
Multipath interference or weak station.
Operation is normal.
4. Start the engine.
5. Check the reception/interference.
Check the antenna and radio grounds. If OK,
check the charging system and the ignition
system.
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Remove the right side C-pillar trim (see page 20-75).
8. Check the connections from the AM/FM antenna
amplifier to the window antenna.
Repair the connections, or substitute a
known-good AM/FM antenna amplifier and retest.
If the symptom/condition goes away, replace the
original AM/FM antenna amplifier (see page 23-87).
Go to step 9.
9. With the help of an assistant inside the vehicle,
have the assistant shine a flashlight (A) along each
antenna wire (B). Check from the outside of the
vehicle for any breaks or openings in the antenna
wires (the light shines through).
Repair the window antenna. Go to AM/FM
antenna repair (see page 23-87), or replace the rear
window (see page 20-47).
Go to step 10.
Is the test vehicle within 10 % of the known-good
vehicle?
Is the r eception/ inter f er ence the same?
Is ther e noise ( static or whine) only with the
engine r unning?
Ar e ther e any loose or damaged connections?
Ar e ther e any br eaks or cuts in the antenna?
08/08/21 14:04:38 61SNR030_230_0035
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