| Last Modified: 11-29-2007 | 1.6 D | |
| Service Category: Brake | Section: Brake Control/Dynamic Control System | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000XGH00RX |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: FREEZE FRAME DATA (2008 Sequoia) | ||
FREEZE FRAME DATA
1. FREEZE FRAME DATA
(a) The skid control ECU stores the current vehicle (sensor) state as freeze frame data when a DTC is detected, or when the ABS, BA, TRAC or VSC are operating.
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, BA, TRAC or VSC was activated.
HINT:
- The skid control ECU will not count the number of times the ignition switch is turned ON if the vehicle does not drive at a speed of at least 7 km/h (4.3 mph), or a DTC is detected.
-
Freeze frame data at the time the ABS, BA, TRAC or VSC operates:
The skid control ECU stores and updates the data whenever the ABS, BA, TRAC or VSC system operates.
When the ECU stores data at the time a DTC is detected, the data stored when the ABS, BA, TRAC or VSC operated may be 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.
(b) Connect the Techstream (with CAN VIM) or Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) From the display on the Techstream, select the FREEZE FRAME DATA.
Skid Control ECU
|
Tester Display |
Measurement Item |
Reference Value |
|---|---|---|
|
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 ON after storing freeze frame data |
0 to 31 |
|
Stop Lamp SW |
Stop light switch signal |
Stop light switch ON: ON, OFF: OFF |
|
Parking Brake SW |
Parking brake switch signal |
Parking brake switch ON: ON, OFF: OFF |
|
Gear Position |
Gear position information |
FAIL 1st 2nd 3rd 4th 5th 6th P, N R NOT R |
|
Operated System |
Operated system status |
ABS activated: ABS VSC activated: VSC TRAC activated: TRAC BA activated: BA HAB activated: HAB Fail-safe mode activated: FAIL PBA activated: PBA PB activated: PB Hill-start assist control activated: HA-CTRL System prohibited: SYS No system activated: NON |
|
Master Cylinder Sensor |
Master cylinder pressure sensor reading |
Min.: 0 V, Max.: 5 V |
|
M/C Sensor Grade |
Master cylinder pressure sensor change |
Min.: -30 MPa/sec., Max.: 255 MPa/sec. |
|
Stroke Sensor |
Stroke sensor reading |
Min.: 0 V, Max.: 5 V |
|
Stroke Sensor Grade |
Stroke sensor grade |
Min.: -2560 mm/s, Max.: 2550 mm/s |
|
Yaw Rate Sensor |
Yaw rate sensor reading |
Min.: -128°/sec., Max.: 127°/sec. |
|
Lateral G |
Lateral G |
Min.: -25.11 m/sec.2, Max.: 24.91 m/sec.2 |
|
Forward and Rearward G |
Forward and rearward G |
Min.: -25.11 m/sec.2, Max.: 24.91 m/sec.2 |
|
FR Wheel Speed |
Front right wheel speed reading |
Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) |
|
FL Wheel Speed |
Front left wheel speed reading |
Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) |
|
RR Wheel Speed |
Rear right wheel speed reading |
Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) |
|
RL Wheel Speed |
Rear left wheel speed reading |
Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) |
|
Vehicle Speed |
Vehicle speed reading |
Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) |
|
Vehicle Speed Grade |
Vehicle speed grade |
Min.: -25.11 m/sec.2, Max.: 24.91 m/sec.2 |
|
Real Engine Torque |
Real engine torque |
Min.: -1024 Nm, Max.: 1023 Nm |
|
Steering Angle Sensor |
Steering angle sensor reading |
Min.: -3276.8° Max.: 3276.7° |
|
TRAC/VSC Off Mode |
TRAC/VSC Off Mode |
Normal mode TRAC OFF mode VSC OFF mode |
|
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