FREEZE FRAME DATA
Whenever a DTC is detected, the skid control ECU (brake actuator assembly) stores the current vehicle (sensor) state as Freeze Frame Data.
The skid control ECU (brake actuator assembly) stores the number of times (maximum: 31) the ignition switch has been turned from off to ON since the last time the ABS was activated.
Tech Tips
However, if the vehicle is stopped or at a low speed (7 km/h (4.3 mph) or less), or if a DTC is detected, the skid control ECU (brake actuator assembly) will stop counting the number.
Freeze Frame Data at the time the ABS operates:
The skid control ECU (brake actuator assembly) stores and updates data whenever the ABS system operates.
When the ECU stores data at the time a DTC is detected, the data stored during ABS operation is cleared.
Freeze Frame Data at the time a DTC is detected:
When the skid control ECU (brake actuator assembly) stores data at the time a DTC is detected, no updates will be performed until the data is cleared.
CHECK FREEZE FRAME DATA
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Check the freeze frame data by following the prompts on the intelligent tester display.
| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
|---|---|---|---|
| Elapsed Time after Freeze Trigger | Elapsed time after freeze trigger/Min.: 0 msec, Max.: 500 msec | - | - |
| Number of IG ON | Number of operations of ignition switch being turned to ON after storing Freeze Frame Data/0 to 31 | - | - |
| Stop Light SW | Stop light switch/OFF or ON | OFF: Brake pedal released ON: Brake pedal depressed |
- |
| Parking Brake SW | Parking brake switch/OFF or ON | OFF: Parking brake released ON: Parking brake applied |
- |
| Gear Position | Gear position information / P, N, R, 1st-8th, Fail, Not R | - | Actual gear position |
| Shift Lever Position | Shift lever position information/P, N, R, D/M, 1st-6th/B, FAIL | - | Actual shift lever position |
| Operated System | Operated system status/Non, ABS, VSC, TRC, BA, Fail, Sys | - | No operation activated: Non ABS activated: ABS VSC activated: VSC TRC activated: TRC BA activated: BA Fail safe mode activated: Fail System prohibit activated: Sys |
| Master Cylinder Sensor | Master cylinder pressure sensor reading/Min.: 0 V, Max.: 5 V | 0.3 to 0.9 V: When brake pedal is released | Reading increases when brake pedal is depressed. |
| M/C Sensor Grade | Master cylinder pressure sensor change/Min.: -30 MPa/s, Max.: 225 MPa/s | 0 MPa/s: When brake pedal is released or pedal held at constant position | When brake pedal is being operated: Changes in proportion with pedal movement speed |
| Yaw Rate Sensor | Yaw rate sensor/Min.: -128 °/s, Max.: 127 °/s | 0°/s: Vehicle stopped -128 to 0°/s: Turning right 0 to 127°/s: Turning left |
- |
| Lateral G | Lateral G/Min.: -25.10 m/s2, Max.: 24.90 m/s2 | - | During turning: Changes in proportion with acceleration |
| Forward and Rearward G | Forward and backward G/Min.: -25.10 m/s2, Max.: 24.90 m/s2 | - | During acceleration/deceleration: Changes in proportion with acceleration |
| FR Wheel Speed | FR wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) | 0 km/h: Vehicle stopped | When driving at constant speed: No large fluctuations |
| FL Wheel Speed | FL wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) | 0 km/h: Vehicle stopped | When driving at constant speed: No large fluctuations |
| RR Wheel Speed | RR wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) | 0 km/h: Vehicle stopped | When driving at constant speed: No large fluctuations |
| RL Wheel Speed | RL wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) | 0 km/h: Vehicle stopped | When driving at constant speed: No large fluctuations |
| Vehicle Speed | Maximum wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) | Actual vehicle speed | Speed indicated on speedometer |
| Vehicle Speed Grade | Vehicle speed grade/Min.: -25.10 m/s2, Max.: 24.90 m/s2 | 0 m/s2: Vehicle stopped | During driving: Changes in proportion with vehicle acceleration/deceleration |
| Real Engine Torque | Real engine torque/Min.: -1024 Nm, Max.: 1023 Nm | - | - |
| Accelerator Opening Angle % | The difference of a present accelerator/Min.: 0%, Max.: 128% | 0%: When the accelerator pedal is released | During accelerator pedal operation: Changes in proportion with the pedal movement |
| IG1 Voltage Value | IG1 voltage value / Min.: 0 V, Max.: 20 V | - | Changes in proportion to auxiliary battery voltage |
| Inspection Mode | Inspection mode/Other or Inspect | Other: Normal mode Inspect: Inspection mode |
- |
| Steering Angle Sensor | Steering angle sensor/Min.: -3276.8°, Max.: 3276.7° | Left turn: Increase Right turn: Decrease |
- |
| TRC/VSC Off Mode | TRC/VSC off mode/Normal, TRC OFF or VSC OFF | Normal: Normal mode TRC OFF: TRC OFF mode VSC OFF: TRC, VSC OFF mode |
- |
CLEAR FREEZE FRAME DATA
Note
Clearing the DTC will also clear the Freeze Frame Data.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Clear the DTC and Freeze Frame Data Click here.