Ecd System Freeze Frame Data
DESCRIPTION
LIST OF FREEZE FRAME DATA
Ecd System -- Freeze Frame Data |
- 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 air fuel ratio was lean or rich, as well as the other data recorded at the time of a malfunction.
- HINT:
- If it is impossible to duplicate the problem even though a DTC is stored, confirm the freeze frame data.
- The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the GTS, 5 separate sets of freeze frame data can be checked.
- 3 data sets from before the DTC was stored
- 1 data set from when the DTC was stored
- 1 data set from after the DTC was stored
- These data sets can be used to simulate the condition of the vehicle from around the time of the occurrence of the malfunction. The data may assist in identifying the cause of the malfunction, and in judging whether it was temporary or not.
| LIST OF FREEZE FRAME DATA |
Tester Display
| Measurement Item
| Diagnostic Note
|
Vehicle Speed
| Vehicle speed
| The speed indicated on the speedometer.
|
Engine Speed
| Engine speed
| -
|
MAP
| Absolute pressure inside intake manifold
| -
|
Coolant Temp
| Engine coolant temperature
| If -40°C (-40°F), the sensor circuit is open.
If 140°C (284°F) or higher, the sensor circuit is shorted.
|
Intake Air
| Intake air temperature
| If -40°C (-40°F), the sensor circuit is open.
If 140°C (284°F) or higher, the sensor circuit is shorted.
|
Engine Run Time
| Accumulated engine running time
| -
|
Battery Voltage
| Battery voltage
| -
|
Glow Indicator Supported
| Glow indicator supported
| -
|
Glow Indicator
| Glow indicator
| -
|
Accel Position
| Accelerator pedal position
| -
|
Accel Sens. No.1 Volt %
| Absolute accelerator pedal position No. 1
| -
|
Accel Sens. No.2 Volt %
| Absolute accelerator pedal position No. 2
| -
|
Diesel Throttle Learn Status
| Diesel throttle learning status
| -
|
Throttle Step Position
| Throttle step position
| -
|
Injection Volume
| Injection volume
| -
|
Inj. FB Vol. for Idle
| Injection feedback value for idle speed control
| -
|
Injection Timing
| Injection timing
| -
|
Fuel Temperature
| Fuel temperature
| -
|
Starter Signal
| Starter signal
| -
|
Stop Light Switch
| Stop light switch
| -
|
A/C Signal
| Air conditioning signal
| -
|
Throttle Open Switch
| Throttle open switch status
| -
|
Time after DTC Cleared
| Cumulative time after DTC cleared
| -
|
Distance from DTC Cleared
| Accumulated distance after DTC cleared
| -
|
Warmup Cycle Cleared DTC
| Warmup cycles after DTC cleared
| -
|
TC and TE1
| TC and TE1 connection status
| -
|
ACT VSV
| A/C cut status
| -
|
