LEMON Manuals: Even more car manuals for everyone
Home >> Acura >> 1999 >> 3.5RL >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation Systems >> Symptom Tests >> Display Unit Buttons Do Not Work

Display Unit Buttons Do Not Work

  1. Turn ignition switch to ON (II) position. Using DVOM connected to ground, backprobe display unit 20-pin connector terminal No. 1 (White/Yellow wire), then terminal No. 2 (White/Yellow wire). See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair open in appropriate White/Yellow wire between display unit and underhood or underdash fuse/relay box.
  2. Turn ignition off. Disconnect display unit 20-pin connector. Check continuity between ground and display unit 20-pin connector terminal No. 10 (Black wire). See WIRING DIAGRAMS  . If continuity exists, go to next step. If continuity does not exist, repair open or poor ground connection in Black wire between display unit and ground.
  3. Disconnect navigation unit and display unit 20-pin connectors. Check continuity of Black wire between display unit connector terminal No. 5 and navigation unit connector terminal No. 4. See Figure and Figure . If continuity exists, go to next step. If continuity does not exist, repair open in Black wire between navigation unit and display unit.
  4. Check continuity between ground and display unit connector terminal No. 5 (Black wire), then between ground and navigation unit connector terminal No. 4 (Black wire). See WIRING DIAGRAMS  . If continuity exists, repair short to ground in appropriate Black wire. If continuity does not exist, replace display unit.
scientia non olet · About LEMON Manuals