Toyota 4Runner: Freeze Frame Data

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Freeze Frame Data

FREEZE FRAME DATA

1. FREEZE FRAME DATA

(a) Whenever a DTC is stored, the skid control ECU stores the current vehicle (sensor) state as freeze frame data.

(b) The skid control ECU 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.

HINT:

If the vehicle is stopped or at a low speed (7 km/h (4 mph) or less), or if a DTC is stored, the skid control ECU will stop counting the number of times the ignition switch has been turned from off to ON.
Freeze frame data at the time the ABS/VSC operates:
The skid control ECU stores and updates data whenever the ABS/VSC operates.

When the ECU stores data at the time a DTC is stored, the data stored during ABS/VSC operation is cleared.
Freeze frame data at the time a DTC is stored:
When the skid control ECU stores data at the time a DTC is stored, no updates will be performed until the data is cleared.

2. CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(e) 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 msec, Max.: 500 msec	-	-
Number of IG ON	Number of times ignition switch turned to ON after storing freeze frame data/ 0 to 31	-	-
Stop Light SW	Stop light switch/ ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-
Buzzer	Buzzer/ ON or OFF	ON: Buzzer on OFF: Buzzer off	The combination meter has a built-in buzzer.
Parking Brake SW	Parking brake switch/ ON or OFF	ON: Parking brake applied OFF: Parking brake released	-
Reservoir Warning SW	Brake fluid level warning switch/ ON or OFF	OFF	-
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, TRAC, BA, HAB, PBA, PB, HA-CTRL, Fail, TSC, Sys or Non	-	ABS: ABS is activated. VSC: VSC is activated. TRAC: TRAC is activated. BA: BA is activated. HAB: HAB is activated. PBA: PBA is activated. PB: PB is activated. HA-CTRL: Hill-start assist control is activated. TSC: Trailer sway control is activated. Fail: Fail safe mode is activated. Sys: System prohibit is activated. Non: No operation is activated.
Master Cylinder Sensor	Master cylinder pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V	When brake pedal released: 0.3 to 0.9 V	The value increases when the brake pedal is depressed.
M/C Sensor Grade	Master cylinder pressure sensor change/ Min.: -30 MPa/s, Max.: 225 MPa/s	When brake pedal released or pedal held at constant position: 0 MPa/s	Changes in proportion with the pedal movement speed when the brake pedal is being operated.
Yaw Rate Sensor	Yaw rate and acceleration sensor/ Min.: -128°/s, Max.: 127°/s	Vehicle stopped: 0°/s Turning right: -128 to 0°/s Turning left: 0 to 127°/s	-
Lateral G	Lateral G/ Min.: -25.10 m/s2, Max.: 24.90 m/s2	-	Changes in proportion with the pedal movement speed when the brake pedal is being operated.
Forward and Rearward G	Forward and backward G/ Min.: - 25.10 m/s2, Max.: 24.90 m/s2	-	Changes in proportion with acceleration during acceleration/deceleration.
FR Wheel Speed	Front wheel speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	No large fluctuations when driving at a constant speed.
FL Wheel Speed	Front wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	No large fluctuations when driving at a constant speed.
RR Wheel Speed	Rear wheel speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	No large fluctuations when driving at a constant speed.
RL Wheel Speed	Rear wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	No large fluctuations when driving at a constant speed.
Vehicle Speed	Maximum wheel speed sensor reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	No large fluctuations when driving at a constant speed.
Vehicle Speed Grade	Vehicle acceleration/ Min.: -25.10 m/s2, Max.: 24.90 m/s2	Vehicle stopped: 0 m/s2	Changes in proportion with the vehicle acceleration/deceleration during driving.
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	Actual engine torque/ Min.: -1024.0 Nm, Max.: 1023.0 Nm	-	-
Accelerator Opening Angle %	Throttle valve opening amount/ Min.: 0.0%, Max.: 128.0%	When accelerator pedal released: 0%	Changes in proportion with the movement of the pedal during accelerator pedal operation.
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	-
TRAC/VSC Off Mode	TRAC/VSC off mode/ Normal, TRC OFF or VSC OFF	Normal: Normal mode TRC OFF: TRAC off mode VSC OFF: VSC off mode	-

3. CLEAR FREEZE FRAME DATA

NOTICE:

Clearing the DTCs will also clear the freeze frame data.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

Dtc Check / Clear

DTC CHECK / CLEAR 1. DTC CHECK / CLEAR (when Using Techstream) (a) Check for DTCs. (1) Connect the Techstream to the DLC3. (2) Turn the ignition switch to ON. (3) Turn the Techstream on. (4) Ent ...

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DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any p ...

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