Acura TSX / Honda Accord CL. Manual - part 164

fuses if they are OK. 

Are the fuses OK? 

YES -Go to step 2. 

NO -Replace the fuse and recheck. 

2. Turn the ignition switch to ACC (I).  

3. Operate the radio and listen to the audio. 

Can audio be heard? 

YES -Go to step 4. 

NO -Check the ACC circuit. 

4. Turn the ignition switch ON (II).  

5. Measure the voltage between body ground and navigation unit connector C (8P) terminals No. 1 and No. 

2 individually. 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

  

 

Fig. 34: Measuring The Voltage Between Body Ground And Navigation Unit Connector C (8P) 
Terminals No. 1 And No. 2 

Is there battery voltage? 

YES -Go to step 6. 

NO -If the + B wire does not have voltage, repair open in the wire between the under-dash fuse relay box 
and the navigation unit. If the ACC wire does not have voltage, repair open in the wire between the 
under-dash fuse/relay box and the navigation unit. 

6. Turn the ignition switch OFF.  

7. Disconnect the navigation unit connector C (8P).  

8. Check for continuity between navigation unit connector C (8P) terminal No. 4 and body ground. 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

  

 

Fig. 35: Checking For Continuity Between Navigation Unit Connector C (8P) Terminal No. 4 And 
Body Ground 

Is there continuity? 

YES -Go to step 9. 

NO -Repair open in the wire between the navigation unit and body ground (G602). 

9. Reconnect the navigation unit connector C (8P).  

10. Perform the forced starting of the display (see FORCED STARTING OF DISPLAY ). 

Is the diagnosis menu of the picture diagnosis displayed?

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

  

 

YES -Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see DIAGNOSTIC 
TEST: NAVI SYSTEM LINK ) to check the links. 

NO -Go to step 11. 

11. Shield the display unit from the sun with your hand, and check that the display is back lit (only back light 

is ON.) 

Can you see the back light? 

YES -Replace the navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ). 

NO -Go to step 12. 

12. Turn the ignition switch ON (II).  

13. Measure the voltage between body ground and display unit 20P connector terminal No. 1 and No. 2 

individually. 

Fig. 36: Measuring The Voltage Between Body Ground And Display Unit 20P Connector Terminal 
No. 1 And No. 2 

Is there battery voltage? 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX