2AZ-FE ENGINE CONTROL: SFI SYSTEM: FREEZE FRAME DATA

1. DESCRIPTION

* The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT
If it is impossible to replicate the problem even though a DTC is detected, confirm the freeze frame data.

* The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the Techstream, 5 separate sets of freeze frame data can be checked.

* 3 data sets before the DTC was stored.

* 1 data set when the DTC was stored.

* 1 data set after the DTC was stored.

* These data sets can be used to simulate the condition of the vehicle around the time of the occurrence the malfunction. The data may assist in identifying the cause of the malfunction, and judging whether it was temporary or not.

2. LIST OF FREEZE FRAME DATA

* *1: Automatic Transaxle only.

* *2: Manual Transaxle only.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Freeze Frame Data

Use the Manual With the Right Hardware

When to See a Mechanic