Honda Civic. Manual — part 128

19 terminal or navigation unit connector B (22P) No. 15 terminal and body
ground (G505) (see CONNECTOR TO HARNESS INDEX ).

AUDIO UNIT POWER SWITCH WILL NOT TURN ON (NO INFORMATION DISPLAY AND NO
SOUND) (WITHOUT NAVIGATION)

1. Turn the ignition switch to ON (II).
2. Push the power switch ON to see if audio unit turns ON.

Does the audio unit operate properly, and does the audio sound normal?

YES -Intermittent failure, the system is OK at this time.

NO -Go to step 3.

3. Turn the ignition switch to LOCK (0).
4. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 35 (7.5

A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES -Go to step 5.

NO -Replace the fuse(s), and recheck.

5. Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION).

Check that the audio unit is properly connected.

Is it connected properly?

NOTE:

Check the vehicle battery condition first.

Check the connectors for poor connections or loose
terminals.

NOTE:

Eject all the discs before removing the audio unit to
prevent damaging the CD player's load mechanism.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Audio System - Civic (Except Hybrid)

YES -Go to step 6.

NO -Reconnect the connector, and recheck the function.

6. Turn the ignition switch to ON (II).
7. Measure the voltage between audio unit connector A (17P) terminal No. 14 and

body ground, and between terminal No. 17 and body ground.

Fig. 46: Measuring Voltage Between Audio Unit A (17P) Connector
Terminal And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage on the both terminals?

YES -Go to step 8.

NO -Repair open in the wire(s) between the No. 23 (10 A) fuse in the under-
hood fuse/relay box and No. 35 (7.5 A) in the under-dash fuse/relay box and
the audio unit.

8. Turn the ignition switch to LOCK (0).
9. Turn the ignition switch to ON (II).

10. Measure the voltage between audio unit connector A (17P) No. 9 terminal and

body ground.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Audio System - Civic (Except Hybrid)

Fig. 47: Measuring Voltage Between Audio Unit A (17P) Connector
Terminal And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.1 V?

YES -Replace the audio unit (see AUDIO UNIT
REMOVAL/INSTALLATION).

NO -Repair open in the wire between audio unit connector A (17P) No. 9
terminal and body ground (G505) (see CONNECTOR TO HARNESS
INDEX ).

AUDIO UNIT POWER SWITCH WILL NOT TURN OFF (WITH NAVIGATION)

1. Turn the ignition switch to ON (II).
2. Push the power switch OFF or turn the ignition switch OFF to see if the

navigation unit turns OFF.

Is the navigation unit OFF?

YES -Operation is normal.

NO -Go to step 2.

NOTE:

Check for aftermarket accessories plugged into the
vehicle's accessory power sockets.

Check the connectors for poor connections or loose
terminals.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Audio System - Civic (Except Hybrid)

3. Turn the ignition switch to LOCK (0).
4. Remove the navigation unit (see NAVIGATION UNIT

REMOVAL/INSTALLATION ).

5. Measure the voltage between navigation unit connector A (17P) terminal No.

14 and body ground.

Fig. 48: Measuring Voltage Between Navigation Unit A (17P) Connector
Terminal And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Check for short to power on PUR wire.

NO -Replace the navigation unit (see NAVIGATION UNIT
REMOVAL/INSTALLATION ).

AUDIO UNIT POWER SWITCH WILL NOT TURN OFF (WITHOUT NAVIGATION)

1. Turn the ignition switch to ON (II).
2. Push the power switch OFF or turn the ignition switch OFF to see if the audio

unit turns OFF.

NOTE:

Check for aftermarket accessories plugged into the
vehicle's accessory power sockets.

Check the connectors for poor connections or loose
terminals.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Audio System - Civic (Except Hybrid)