Initial Inspection and Diagnostic Overview

SYMPTOM CHART

Work Flow For Navigation Inspection:

WORK FLOW FOR NAVIGATION INSPECTION

DRIVING TEST
During the driving test, diagnose the system by checking the difference of symptoms with each sensor ON or OFF.

Test Pattern 1
Test method in which current position adjustment is not made according to GPS data.
- Remove the GPS antenna connector from the NAVI control unit . Drive the vehicle.
Before driving the vehicle, perform "Adjust Current Location" MODE .

Test Pattern 2
Test procedure in which map matching is not used.
- Before driving the vehicle, perform "Adjust Current Location" MODE. With the ignition switch OFF and the map CD-ROM removed from the NAVI control unit, drive the vehicle. After driving the vehicle, reinstall the map CD-ROM. Compare the saved driving tracks for the vehicle's current location with roads on the map.

Example

->Perform test pattern 1.

->Perform test patterns 1 and 2.
- Compare the map and the saved driving tracks. The precision of the saved driving tracks is within several hundred meters.

->Perform test patterns 1 and 2.
- Make adjustments by driving the vehicle over a known course (highway or other road where distances are clearly marked).
Calibrate the distance against the known distance. Use the formula below.
Calibration value = Screen display distance/Actual distance

POWER SUPPLY AND GROUND CIRCUIT CHECK FOR NAVI CONTROL UNIT

Power Supply Circuit Check
If NG, check the following.
- 10 A fuse [No.10, located in the fuse block (J/B)]
- 10 A fuse [No.1, located in the fuse block (J/B)]
- 15 A fuse [No.56, located in the fuse block (J/B)]
- Harness for open or short between fuse and NAVI control unit

Ground Circuit Check

Steps 1 - 3:

Step 4:

VOICE GUIDE OPERATION CHECK