General Operation; Anti-Theft Feature; Symptom Diagnosis - Honda 2007 Acura RL User Manual

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

GENERAL OPERATION

Refer to the Navigation System Manual for the navigation system operating procedures.

ANTI-THEFT FEATURE

The navigation system and audio unit have a coded theft protection circuit. Make sure you have the anti-
theft security codes before:
Disconnecting the battery.

Disconnecting the navigation unit 8P connector.

Removing the No. 7 (10A) fuse from the driver's under-dash fuse/relay box.

After service, reconnect power to the navigation unit, and turn the ignition switch ON (II). Enter the 4-digit
anti-theft security code, then select Done.
If the code cannot be found, use the Interactive Network (iN) to look it up. You can view the serial number
in the Navi ECU diagnostic screen (see UNIT CHECK ). Also, you can find the serial number on the
navigation unit that is stored in the trunk. The serial number is on a label on the bottom of the unit.
When replacing the navigation unit, be sure to give the client the new anti-theft security code.

SYMPTOM DIAGNOSIS

Certain circumstances and system limitations will result in occasional vehicle positioning errors. Some
clients may think this indicates a problem with the navigation system when, in fact, the system is normal.
Keep the following items in mind when interviewing clients about symptoms with the navigation system.
SELF-INERTIAL NAVIGATION LIMITATIONS
The limitations of the self-inertial portion of the navigation system (the yaw rate sensor and the vehicle
speed signal) can cause some discrepancies between the vehicle's actual position and the indicated vehicle
position (GPS vehicle position).
The following circumstances may cause vehicle positioning errors:
Moving the vehicle with the engine stopped and the vehicle stopped, such as by ferry or tow truck, or

if the vehicle is spun on a turn table.
Continuous tire slippage on a slippery surface

Driving with snow chains mounted
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Abnormal tire pressure
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Incorrect tire size
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Frequent lane changes across a wide highway
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Continuous driving on a straight or gently curving highway

Very bumpy roads
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Tolerances in the system and map inaccuracies sometimes limit how precisely the vehicle position is

indicated. Examples of this include:
2007 Acura RL