Freeze Frame Data
- FREEZE FRAME DATA
- Whenever an ABS DTC is detected, the skid control ECU stores the current vehicle (sensor) state as Freeze Frame Data.
- The skid control ECU stores the number of times (maximum: 31) the engine switch has been turned from off to on (IG) since the last time the ABS was activated.
HINT:
- 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 will stop counting the number.
- Freeze Frame Data at the time the ABS operates:
The skid control ECU 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 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 Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
- According to the display on the Techstream, select the trouble code data display with Freeze Frame Data.ABS/VSC/TRAC
Tester Display Measurement Item/Range Normal Condition Diagnostic Note Elapsed Time after Freeze Trigger Elapsed time after freeze trigger / Min.: 0 ms, Max.: 500 ms - - Number of IG ON Number of operations of engine switch being turned on (IG) after storing Freeze Frame Data / 0 to 31 - - Buzzer Skid control buzzer or meter buzzer / ON or OFF ON: Buzzer on
OFF: Buzzer off- Stop Light SW Stop light switch / ON or OFF ON: Brake pedal depressed
OFF: Brake pedal released- Parking Brake SW Parking brake switch / ON or OFF ON: Parking brake applied
OFF: Parking brake released- Gear Position Gear position information / P/N, R, 1st-8th, FAIL or NOT R Actual gear position - Shift Lever Position Shift lever position information / P/N, R, D/M, 1st-6th/B or FAIL Actual shift lever position - Operated System Operated system status / ABS, VSC, TRC, BA, HAB, PBA, PB, HA-CTRL, FAIL, SYS or NON - ABS: ABS activated
VSC: VSC activated
TRC: TRAC activated
BA: BA activated
HAB: HAB activated
PBA: PBA activated
PB: PB activated
HA-CTRL: Hill-start assist control activated
FAIL: Fail safe mode activated
SYS: System prohibit activated
NON: No operation activatedMaster Cylinder Sensor Master cylinder pressure sensor reading / Min.: 0 V, Max.: 5 V When brake pedal is released: 0.3 to 0.9 V Reading increases when brake pedal is depressed M/C Sensor Grade Master cylinder pressure sensor change / Min.: -30 MPa/s, Max.: 225 MPa/s When brake pedal is released or pedal held at constant position: 0 MPa/s When brake pedal is being operated: Changes in proportion with pedal movement speed Yaw Rate Sensor Yaw rate sensor / Min.: -128 deg/s, Max.: 127 deg/s Vehicle stopped: 0 deg/s
Turning right: -128 to 0 deg/s
Turning left: 0 to 127 deg/s- Lateral G Lateral G / Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - During turning: Changes in proportion with acceleration Forward and Rearward G Forward and backward G / Min.: - 25.11 m/s2 , Max.: 24.91 m/s2 - During acceleration/deceleration: Changes in proportion with acceleration FR Wheel Speed Front wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations FL Wheel Speed Front wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations RR Wheel Speed Rear wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations RL Wheel Speed Rear wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations Vehicle Speed Maximum wheel speed sensor reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations Vehicle Speed Grade Vehicle speed grade / Min.: -25.11 m/s2 , Max.: 24.91 m/s2 Vehicle stopped: 0 m/s2 During driving: Changes in proportion with vehicle acceleration/deceleration FR Wheel Direction Front wheel RH direction signal / FORWARD or BACK FORWARD: Forward
BACK: Backward- FL Wheel Direction Front wheel LH direction signal / FORWARD or BACK FORWARD: Forward
BACK: Backward- RR Wheel Direction Rear wheel RH direction signal / FORWARD or BACK FORWARD: Forward
BACK: Backward- RL Wheel Direction Rear wheel LH direction signal / FORWARD or BACK FORWARD: Forward
BACK: Backward- Real Engine Torque Real engine torque / Min.: -1024 N*m, Max.: 1023 N*m - - Accelerator Opening Angle % The difference of a present accelerator / Min.: 0%, Max.: 128% When the accelerator pedal is released: 0% During accelerator pedal operation: Changes in proportion with the pedal movement FR Target Oil Pressure Front wheel RH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure FL Target Oil Pressure Front wheel LH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure RR Target Oil Pressure Rear wheel RH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure RL Target Oil Pressure Rear wheel LH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure Brake Pedal Load Sensing SW Brake pedal load sensing switch / ON or OFF ON: Brake pedal depressed beyond the specified point
OFF: Brake pedal not depressed beyond the specified point- Inspection Mode Inspection mode / OTHER or INSPECT OTHER: Normal mode
INSPECT: Inspection mode- Steering Angle Sensor Steering angle sensor / Min.: - 3276.8 deg, Max.: 3276.7 deg Left turn: Increase
Right turn: Decrease- TRAC/VSC Off Mode TRAC/VSC off mode / NORMAL, TR(A)C OFF or VSC OFF NORMAL: Normal mode
TRC OFF: TR(A)C off mode
VSC OFF: VSC off mode-
- CLEAR FREEZE FRAME DATA NOTE:
Clearing the DTCs will also clear the Freeze Frame Data.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Clear the DTCs and Freeze Frame Data. Refer to DTC CHECK / CLEAR .