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:

+B: 10 - 14 V

CHECK:

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

OK:

ACC: 10 - 14 V

CHECK:

Check continuity terminal GND.

OK:

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