Display unit buttons or touch screen buttons do not work or respond properly
Display unit buttons or touch screen buttons do not work or respond properlyNOTE:
- Always make sure that the correct DVD color and version are installed.
- Check any official Honda service website for more service information about the navigation system.
- Always check the connectors for poor connections or loose terminals.
- Always check the navigation screen settings for brightness, contrast, black level and the color screen for map color and menu color.
- Before troubleshooting, make sure you have the navigation system anti-theft code.
- Make sure the DVD surface doesn't have scratches or smudges.
1. Turn the ignition switch ON (II).
2. Go into the Diagnostic mode and use the "Touch Panel" test under Monitor Check and, if necessary, the "Display" test under Unit Check.
Do the buttons work properly?
YES - System is OK.
NO - Go to step 3.
3. Try all the buttons on the navigation system.
Is there a specific row or columns of buttons, set of buttons, or a certain button that does not respond properly (i.e. pressing a button in the lower left corner causes a button in the right lower corner to respond.)?
YES - Replace the display unit.
NO - Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Remove the audio-HVAC display module.
NOTE: Eject all discs before removing the audio unit to prevent damaging the CD player's load mechanism.
6. Turn the ignition switch ON (II).
7. Measure the voltage between body ground and display unit 20P connector terminal No. 1 and No. 2 individually.
Is there battery voltage?
YES - Go to step 8.
NO - If the +B wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the display unit. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the display unit.
8. Measure the voltage between display unit 20P connector terminal No. 10 and body ground.
Is there 0.1 V or less?
YES - Go to step 9.
NO - Repair open or high resistance in the wire between the display unit and body ground (G503).
9. Turn the ignition switch to LOCK (0).
10. Disconnect the navigation unit connector A (20P).
11. Check for continuity between body ground and display unit 20P connector terminal No. 5 and No. 15 individually.
Is there continuity?
YES - Short to body ground in the wire(s) between the display unit and the navigation unit. Replace the affected shielded harness.
NO - Go to step 12.
12. Check for continuity between display unit 20P connector according to the table.
Is there continuity between any of the terminals?
YES - Short in the wire(s) between display unit and navigation unit. Replace the affected shielded harness.
NO - Go to step 13.
13. Check for continuity between display unit 20P connector and navigation unit connector A (20P) according to the table.
Is there continuity?
YES - Substitute a known-good display unit and recheck. If the symptom/indication goes away, replace the original display unit. If the symptom/indication is still present, replace the navigation unit.
NO - Open in the wire(s) between display unit and navigation unit. Replace the affected shielded harness.