Inspection Procedure

Check the MAP DISC.
1. NG : Replace the MAP DISC.
2. OK : Go to next step
Insert a MAP DISC without tilt.
1. OK : Normal.
2. NG : Go to next step
Check the navigation ECU.
PREPARATION:

Disconnect the navigation ECU connector.

CHECK:

Check voltage terminals +B.

OK:
1. +B: 10 - 14 V
CHECK:

Check voltage terminal ACC when turn ignition switch ACC or ON position.

OK:
1. ACC: 10 - 14 V
CHECK:

Check continuity terminal GND.

OK:
1. GND: Continuity
  1. NG : Replace or repair wire harness.
  2. OK : Replace the navigation ECU.