Inspection Procedure

1. Perform display check.
   1. Set up diagnosis system and read result of display vehicle signal check mode.

   Standard: Input signal is normal (TAIL) 

1. OK: Go to step   3 

NG: Go To Next Step 

1. Remove the navigation receiver assy and disconnect the connector.
Fig 1: Disconnecting Navigation Receiver Assy Connector (ILL+,ILL-)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check voltage.
   1. Measure voltage between terminals ILL+ and ILL-of navigation receiver assy at each conditions, as shown in the chart.
   NAVIGATION RECEIVER ASSY TERMINALS VOLTAGE
   
   

   Headlight dimmer switch position	Condition
   OFF	0V
   TAIL or HEAD	10-14V

3. Check continuity.
   1. Check that the continuity exists between terminal ILL- of navigation receiver assy and body ground.

   Standard: Continuity exists 

1. OK: CHECK AND REPLACE NAVIGATION RECEIVER ASSY 

NG: Go To Next Step 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Check the settings.

1. Turn the ignition switch to ON.
2. Turn the power switch of the navigation receiver assy to ON to display the map.
3. Operate the navigation receiver assy, and check that "The color of night screen is standard" is set at the navigation condition setting.

Standard: The setting is normal 

1. NG: THE SETTING IS ABNORMAL 

OK: Go To Next Step 

CHECK AND REPLACE NAVIGATION RECEIVER ASSY