A21120A

ServiceNews Article
January 2022
A21120A Version 1
Clock Repair Procedure
AFFECTED VEHICLES
Year
Model
Trim Level
2006–12
Accord Coupe and Sedan
ALL
2010–12
Accord Crosstour
ALL
2006–07
Accord Hybrid
ALL
2005–10
Odyssey
ALL
2006–11
Pilot
ALL
2006–14
Ridgeline
ALL
Applies to / All vehicles with Navigation
The clock shows the incorrect time. This issue is due to a limited GPS receiver capacity resulting in “rollover” of the
internal chip memory; the “rollover” will occur on January 1, 2022, at 12:00AM local time. As a result, once specific triggers
are met, the navigation date and time will be incorrect.
When will the customer first notice the incorrect time and date?
The customer will notice this between January 1, 2022, and March 13, 2022 when these occur.
• After the vehicle battery is disconnected and reconnected.
• The start of daylight saving time (DST) on March 13, 2022.
NOTE: 2006–2014 Ridgeline units, the clock has rollover, with no possible work around until August 17,2022.
What will the navigation system date display when the issue occurs?
The date will display January 1, 2002 (default start date).
What will the navigation system time display when the issue occurs?
The time will display 1:00 (default start time) and continue onward. The new and incorrect time will stay on every time
the vehicle’s power is cycled off and then on.
© 2022 American Honda Motor Co., Inc. – All Rights Reserved
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Can the date be adjusted to the correct value manually?
After January 1, 2022, when the system internal calendar is reset to May 19, 2002, the date will always be incorrect and
stay incorrect. There is no solution to correct it.
Can the digital Radio/LCD time be adjusted to the correct value manually?
Follow the steps below from January 1, 2022, to August 16, 2022, to adjust the time during this period.
NOTE:
• You must do this at the specific time, or the update will not happen.
• Verify both the Navigation and Radio code are available before disconnecting the battery.
• 2006–14 Ridgeline units are NOT included in this process.
1. Disconnect the vehicle’s battery Negative (-) terminal first, followed by the Positive (+) terminal at the exact local time
of 12:40 AM/PM.
2. With an accurate source of time to compare to, reconnect the Positive (+) terminal followed by the Negative (-) terminal
at exactly 1:00 AM/PM.
3. Turn ACC on, enter both the Navigation and Radio codes. The digital LCD clock will now keep time from 1:00 AM/PM
local time.
On or after August 17, 2022, when the system’s internal calendar recalibrates, the GPS time signal becomes valid again.
The clock will show the correct GPS time but most likely be off by 1 hour because the system’s internal calendar interprets
the daylight saving time (DST) change incorrectly.
Now, the customer can adjust the time correctly, and it won’t be affected every time the vehicle’s power is cycled off and
then on. The correct time will stay on through the next DST change based on the system internal calendar.
What can we do to avoid the time changes to incorrect value again after August 17, 2022?
The automatic DST function will not work properly causing the incorrect time at the perceived DST date. We recommend
that after August 17, 2022, the customer sets the “Auto Daylight Saving” function to “OFF” and adjust the DST manually.
What other navigation functions are affected?
Function
Assumed symptom
Navigation history
The display of navigation history including registered location or destination
history is not in the latest order. Data newly added is not shown at the top,
but at the bottom of the list.
Route guidance
Navigation detour guidance may not perform properly.
Traffic information
Updated traffic information may not display on the navigation system
properly.
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