Ti, 9112 ATI Pcm5.0 Daylight Savings Time Not In Effect

Vehicles Affected 

Models	Model Year	Model Type	VIN Range	Vehicle-Specific Equipment
911 Carrara	As of 2020	992	N/A	N/A
Cayenne	As of 2019	9YA	N/A	N/A
Macan	As of 2020	95B	N/A	N/A

Revision History 

Revision	Release Date	Changes
0	March 27, 2020	Original document

Condition 

The customer complains that daylight savings time will not take effect. Possibly, there may be complaint that the PCM did not adjust the time when the customer changed time zones.

Technical Background 

There is a mismatch between the actual time (as correctly reported by the GPS) and the time displayed to the customer by the vehicle system. The vehicle system time does not reflect the one-hour adjustments for daylight savings time or possibly the time zone change.

Service Information 

You can solve this condition quickly by disabling and re-enabling automatic time sync and automatic time zone.

Follow these steps:

1. Click on the upper right hand corner of the PCM screen. (By default a clock is located here.)
2. Click "Time Settings" on the following menu.
3. Then uncheck the boxes for "Automatic time sync" and "Automatic time zone".
4. Exit this screen and repeat steps  a and  b. Then check those same boxes

This correction should fix the issue and the incorrect time will not be displayed again

Warranty 

Please be sure to document your findings in PQIS thoroughly

Use the following PQIS coding:

Cause location:	91120 Navigation unit
Cause symptom:	4000 Electrical error

Search Items 

DST, time zone, wrong time, hour, behind, ahead