Test E: Navigation System Does Not Operate Correctly - The Display Screen Is Inoperative

PINPOINT TEST E: NAVIGATION SYSTEM DOES NOT OPERATE CORRECTLY - THE DISPLAY SCREEN IS INOPERATIVE

E1-E3:

E3-E4:

E4-E6:

Normal Operation
The audio unit display is controlled by the navigation module. Video color is provided through circuits 10-GK24 (GY/RD), 10-GK25 (GY/OG), and 10-GK26 (GY/VT). Circuit 8-GK35 (WH) provides the color synchronization and circuit 9-GK35 (BN) is the video signal return.

Possible Causes
- circuit 8-GK35 (WH) open, short to ground or short to voltage
- circuit 9-GK35 (BN) open, short to ground or short to voltage
- circuit 10-GK24 (GY/RD) open, short to ground or short to voltage
- circuit 10-GK25 (GY/OG) open, short to ground or short to voltage
- circuit 10-GK26 (GY/VT) open, short to ground or short to voltage
- navigation module
- audio unit