Vehicle properties
Diagnostics & OBD2
OBD2_FREEZE_FRAME_INFO
What it is
OBD2 Freeze Frame Information
This property describes the current freeze frames stored in vehicle memory and available for retrieval via OBD2_FREEZE_FRAME.
The values are to be interpreted as follows: each element of int64Values must be the timestamp at which a a fault code has been detected and the corresponding freeze frame stored, and each such element can be used as the key to OBD2_FREEZE_FRAME to retrieve the corresponding freeze frame.
How the ID is built
A property ID is a 32-bit value packing four fields. Reading 0x11e00d02 apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x01000000 | GLOBAL |
| Type | 0x00ff0000 | 0x00e00000 | MIXED |
| Ordinal | 0x0000ffff | 0x00000d02 | 0xd02 |
Reading it from an app
CarPropertyManager mgr = (CarPropertyManager)
car.getCarManager(Car.PROPERTY_SERVICE);
CarPropertyValue<Object> value =
mgr.getProperty(VehiclePropertyIds.OBD2_FREEZE_FRAME_INFO, 0);This property is read-only — writes are rejected. It fires a callback whenever the value changes.