Pioneer DEH-S5120BT System Firmware Update Instructions - Page 2
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Procedure:
1.
Start the vehicle engine (in an open, well-ventilated area).
2.
If AV Source is On, Press and hold SRC/OFF to set the unit Source OFF.
3.
Press M.C. (multi-control) to display the "Initial "menu. then press to confirm.
4.
Turn M.C. dial to select "SYSTEM UPDATE", then press to confirm.
5.
Select the "SYSTEM INFO" to confirm the system info.
6.
After the "SYSTEM INFO" screen appears, check the firmware version.
7.
Verify that the firmware on your unit is not already firmware version 08.27, 18.03, or 28.03.
08.11