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, if the engine was warmed up or not, and other data from the time the malfunction occurred.
Tech Tips
If it is impossible to duplicate the problem even though a DTC is stored, confirm the freeze frame data.
*1 | DTC is stored |
*2 | 0.5 seconds |
*3 | Freeze frame data recorded |
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 |
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Vehicle Speed |
Target Idle Engine Speed |
Engine Speed |
Calculate Load |
MAF |
Atmosphere Pressure |
MAP |
Coolant Temp |
Intake Air |
Intake Air Temp (Turbo) Supported |
Intake Air Temp (Turbo) |
Engine Run Time |
Initial Engine Coolant Temp |
Initial Intake Air Temp |
Battery Voltage |
Alternate Duty Ratio |
Glow Relay Request |
Glow Control Unit Duty |
Glow Indicator Supported |
Glow Indicator |
Accel Position |
Accel Sens. No.1 Volt % |
Accel Sens. No.2 Volt % |
Target Throttle Position Supported |
Target Throttle Position |
Target Throttle Position #2 Supported |
Target Throttle Position #2 |
Actual Throttle Position Supported |
Actual Throttle Position |
Actual Throttle Position #2 Supported |
Actual Throttle Position #2 |
Throttle Motor DUTY |
Throttle Close Learning Val. |
Throttle Sensor Volt % |
Throttle Motor DUTY |
Injection Volume |
Inj. FB Vol. for Idle |
Inj Vol Feedback Learning |
Injection Feedback Val #1 |
Injection Feedback Val #2 |
Injection Feedback Val #3 |
Injection Feedback Val #4 |
Pre Injection Period |
Pilot 1 Injection Period |
Pilot 2 Injection Period |
Main Injection Period |
After Injection Period |
Pre Injection Timing |
Pilot 1 Injection Timing |
Pilot 2 Injection Timing |
Main Injection Timing |
After Injection Timing |
Pilot Quantity Learning |
Injector Pilot Quantity Learning |
Actuator Pilot Quantity Learning |
Temperature Pilot Quantity Learning |
Catalyst Pilot Quantity Learning |
Injection Pressure Correction |
PCV Energization Timing |
Injection EDU Relay Request |
Target Common Rail Pressure Supported |
Target Common Rail Pressure |
Common Rail Pressure Supported |
Common Rail Pressure |
Fuel Temperature Supported |
Fuel Temperature |
Fuel Return Temperature |
Injection Volume (Cylinder1) |
Pressure Discharge Valve |
Pump Difference Angle Learning Value |
Target EGR Valve Pos Supported |
Target EGR Valve Pos |
Target EGR Valve Pos #2 Supported |
Target EGR Valve Pos #2 |
Actual EGR Valve Pos Supported |
Actual EGR Valve Pos |
EGR Rate Differential(Actual-Target) |
Actual EGR Valve Pos #2 Supported |
Actual EGR Valve Pos #2 |
EGR Position Sensor |
EGR Motor Duty #1 |
EGR Close Lrn. Val. |
EGR Cooler Bypass VSV |
EGR Cooler Bypass Position |
Target Booster Pressure Supported |
Target Booster Pressure |
VN Turbo Command Supported |
Target VN Turbo Position |
VN Turbo Command #2 Supported |
Target VN Turbo Position #2 |
Actual VN Position Supported |
Actual VN Turbo Position |
Actual VN Position #2 Supported |
Actual VN Turbo Position #2 |
VN Position Sensor Out |
VN Motor Duty |
VN Close Learn Value |
VN Turbo Max Angle |
VN Turbo Min Angle |
Starter Signal |
Power Steering Signal |
Neutral Position SW Signal |
Clutch Switch |
Transfer L4 |
Stop Light Switch |
A/C Signal |
Immobiliser Communication |
TC Terminal |
Time after DTC Cleared |
Distance from DTC Cleared |
Warmup Cycle Cleared DTC |
Dist Batt Cable Disconnect |
IG OFF Elapsed Time |
TC and TE1 |
Total Distance Traveled |
Engine Speed (Starter Off) |
Starter Count |
Run Dist of Previous Trip |
Glow Request Lighting Time |
IG-ON Time |
MAF Low |
Boost Pressure Low |
Common Rail Pressure Low |
Engine Coolant Temp High |
MAF/Estimate MAF Ratio |
Compression Leakage Count |
Plural Cylinders Rough Idle |
Rough Idle #1 |
Rough Idle #2 |
Rough Idle #3 |
Rough Idle #4 |
Electric Duty Feedback Value |
A/C Duty Feedback Value |
PS Duty Feedback Value |
Idle Injection Volume (Min) |
Engine Starting Time |
Minimum Engine Speed |
ACT VSV |
Brake Override System |
Immobiliser Fuel Cut History |
SPD (NT) |
SPD (SP2) |
Shift SW Status (P Range) |
Pattern Switch (PWR/M) |
Shift SW Status (R Range) |
Shift SW Status (N Range) |
Shift SW Status (N,P Range) Supported |
Shift SW Status (N,P Range) |
Sports Shift Up SW |
Sports Shift Down SW |
Sports Mode Selection SW |
Shift SW Status (D Range) |
ECO Switch |
Stop&Start of Eng State |