Diagnosis By Error History

WARNING: This page is about a different car, the 2007 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

The "Self-diagnosis" results indicate whether an error occurred during the period from when the ignition switch is turned to ON until "Self-diagnosis" is completed.

If an error occurred before the ignition switch was turned to ON and does not occur again until the "Self-diagnosis" is completed, the diagnosis result will be judged normal. Therefore, those errors in the past, which cannot be found by the "Self-diagnosis", must be found by diagnosing the "Error History".

The error history displays the time and place of the most recent occurrence of that error. However, take note of the following points.

Correct time of the error occurrence may not be displayed when the GPS antenna substrate within the NAVI control unit has malfunctioned.
Place of the error occurrence is represented by the position of the current-location mark at the time when the error occurred. If the current-location mark has deviated from the correct position, then the place of the error occurrence may be located correctly.
The maximum number of occurrences which can be stored is 50. For the 51st and later occurrences, the displayed number remains 50.

When a reproducible malfunction occurred but its cause cannot be identified because several errors are present, record the item, number and place (longitude/latitude) of error occurrence (or delete the error history), then turn the ignition switch from OFF to ON to reproduce the malfunction. Check the error history to find the items which show an increased number of occurrences, and diagnose the item.

POSSIBLE CAUSES REFERENCE

Error item	Possible causes	Example of symptom
Error item	Action/symptom	Example of symptom
Gyro sensor disconnected	Communications malfunction between NAVI control unit and internal gyro.	Navigation location detection performance has deteriorated. (Angular velocity cannot be detected.)
Gyro sensor disconnected	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference.
GPS disconnected	Communication error between NAVI control unit and internal GPS substrate.	Navigation location detection performance has deteriorated. (Location correction using GPS is not performed.) GPS receiving status remains gray.
GPS disconnected	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference.
GPS transmission cable malfunction	Malfunctioning transmission wires to NAVI control unit and internal GPS substrate.	During self-diagnosis, GPS diagnosis is not performed.
GPS transmission cable malfunction	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference.	During self-diagnosis, GPS diagnosis is not performed.
GPS input line connection error	Malfunctioning receiving wires to NAVI control unit and internal GPS substrate.	Navigation location detection performance has deteriorated. (Location correction using GPS is not performed.) GPS receiving status remains gray.
GPS input line connection error	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference.
GPS TCX0 over GPS TCX0 under	Oscillating frequency of the GPS substrate frequency synchronizing oscillation circuit exceeded (or below) the specification	Navigation location detection performance has deteriorated. (Location correction using GPS is not performed.) GPS receiving status remains gray.
GPS TCX0 over GPS TCX0 under	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference, or the control unit may have been subjected to excessively high or low temperatures.
GPS ROM malfunction GPS RAM malfunction	Contents of ROM (or RAM) in GPS substrate are malfunctioning.	Location detection accuracy of the navigation system will deteriorate, depending on the error area in the memory, because GPS cannot make correct positioning. (Location correction using GPS is not performed.)
GPS ROM malfunction GPS RAM malfunction	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference.
GPS RTC malfunction	Clock IC in GPS substrate is malfunctioning.	Correct time may not be displayed. After the power is turned on, the system always takes some time until GPS positioning becomes possible. (The GPS receiver starts positioning without re-collecting the whole satellite information when it judged the data stored in the receiver is correct.) Correct time of error occurrence may not be stored in the error history.
GPS RTC malfunction	Perform self-diagnosis. When the NAVI control unit is judged normal by self-diagnosis, the symptom may be intermittent, caused by strong radio interference.
GPS antenna disconnected	Malfunctioning connection between GPS substrate in NAVI control unit and GPS antenna.	Navigation location detection performance has deteriorated. (Location correction using GPS is not performed.) GPS receiving status remains gray.
GPS antenna disconnected	Perform self-diagnosis. When connection between NAVI control unit and GPS antenna is judged normal by self-diagnosis, the symptom may be intermittent, caused by impact or vibration.
Low voltage of GPS	The power voltage supplied to the GPS circuit board has decreased.	Navigation location detection performance has deteriorated. (Location correction using GPS is not performed.) GPS receiving status remains gray.
Low voltage of GPS	Perform self-diagnosis. When connection between NAVI control unit and GPS antenna is judged normal by self-diagnosis, the symptom may be intermittent, caused by impact or vibration.
DVD-ROM Malfunction DVD-ROM Read error DVD-ROM Response Error	Malfunctioning NAVI control unit.	-
	Dedicated map DVD-ROM is in the system, but the data cannot be read.	The map of a particular location cannot be displayed. Specific guidance information cannot be displayed. Map display is slow. Guidance information display is slow. System has been affected by vibration.
	Is map DVD-ROM damaged, warped, or dirty? If damaged or warped, the map DVD-ROM is malfunctioning. If dirty, wipe the DVD-ROM clean with a soft cloth. Perform self-diagnosis. When NAVI control unit is judged normal by self-diagnosis, the symptom is judged intermittent, caused by vibration.