Pinpoint Test N: The vehicle mark display is unstable.

The vehicle speed signal is being properly inputted under "Vehicle Sensor" on the "Vehicle information" diagnostics screen.

Is the vehicle speed input correctly? Note: MOST and navigation system module speeds are approximately the same. 

YES:  Go to step  2.

NO:  Carry out MOST ring circuit checks. Check the Anti-Lock Brake System Module for related DTCs and refer to the relevant DTC Index. Carry out network integrity tests using the manufacturer approved diagnostic system. Refer to electrical circuit diagrams and check CAN circuits if required. Repair wiring harness as required. Rectify the fault and re-test the vehicle.

"0" is displayed in the "Satellites" column under "GPS Information" (on the "Vehicle information" diagnostics screen.)

Is the number of satellites displayed on the screen 0? 

YES:  Refer to GPS no reception mark does not disappear diagnosis.

NO:  Go to step  3.

Confirm if the 'car current position not stable' symptom is occurring in particular locations.

Is the 'car current position not stable' symptom occurring in particular locations? 

YES:  System operation is normal. Signal reflections from buildings or a particular location may be responsible.

NO:  Refer to GPS no reception mark does not disappear diagnosis.