Freeze-Frame Data

NOTE: 1st trip freeze-frame data values can only be displayed with Nissan's CONSULT, and are not displayed on generic scan tool.

ECM records operating conditions such as fuel system status, calculated load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed and absolute pressure. Freeze-frame data is a "snapshot" of these operating conditions present when a fault is detected. When a fault is detected for the 1st time, ECM stores the 1st trip DTC, along with 1st trip freeze-frame data. Only one set of freeze-frame data can be stored in ECM (either 1st trip freeze-frame data or freeze-frame data). There is no priority for 1st trip freeze frame data. It is updated each time a different 1st trip DTC is stored. If a fault is detected for the second time, 1st trip freeze-frame data is replaced with freeze-frame data.

Freeze-frame data is updated in order of priority. See FREEZE FRAME PRIORITY IDENTIFICATION table. If a priority 1 fault (misfire or fuel injection system malfunction) is detected in another trip when priority 2 freeze-frame data is already stored in ECM, priority 2 freeze-frame data will be replaced by priority 1 freeze-frame data.

NOTE: Only one 1st trip DTC and one freeze-frame data "snapshot" can be stored in ECM. If using a generic scan tool, 1st trip DTC freeze-frame information may not be accessible. Use CONSULT-II to retrieve 1st trip DTC freeze-frame information.

FREEZE FRAME PRIORITY IDENTIFICATION

Priority	Items
1	Freeze Frame Data For Misfire DTC P0300-P0308, Fuel Injection System DTC P0171, P0172, P0174, P0175
2	All Freeze Frame Data Except Priority 1
3	1st Trip Freeze Frame Data