Acura TSX / Honda Accord CL. Manual — part 167

Fig. 42: Measuring The Voltage Between Body Ground And Display Unit 20P Connector Terminal
No. 1 And No. 2

Is there battery voltage?

YES -Go to step 4.

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

4. Turn the ignition switch OFF.

5. Disconnect the display unit 20P connector.

6. Disconnect the navigation unit connector A (20P).

7. Check for continuity between display unit 20P connector terminal No. 10 and body ground.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 43: Checking For Continuity Between Display Unit 20P Connector Terminal No. 10 And Body
Ground

Is there continuity?

YES -Go to step 7.

NO -Repair the open in the wire between the display unit and body ground (G503).

8. Check for continuity between body ground and display unit 20P connector terminal No. 3, No. 5, No. 13

and No. 15 individually.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 44: Checking For Continuity Between Body Ground And Display Unit 20P Connector
Terminal No. 3, No. 5, No. 13 And No. 15

Is there continuity?

YES -There is a short to body ground in the circuit between the display unit and the navigation unit.
Replace the affected shielded harness.

NO -Go to step 9.

9. Check for continuity between display unit 20P connector terminal No. 4 and terminals No. 3 and No. 13

individually.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 45: Checking For Continuity Between Display Unit 20P Connector Terminal No. 4 And
Terminals No. 3 And No. 13

Is there continuity?

YES -There is a short between the display unit and the audio unit. Replace the shielded harness.

NO -Go to step 10.

10. Check for continuity between display unit 20P connector terminal No. 14 and terminals No. 5 and No. 15

individually.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX