Toyota Tacoma (2015-2018) Service Manual: Freeze Frame Data
FREEZE FRAME DATA
1. FREEZE FRAME DATA
HINT:
- Whenever a DTC is detected or the ABS operates, 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 ignition switch has been turned from OFF to ON since the last time the ABS was activated. However, if the vehicle was stopped or at low speed (4.3 mph (7 km/h) or less), or if a DTC is detected, the skid control ECU will not count the number after that.
- Freeze frame data at the time the ABS operates: The skid control ECU stores and updates the data whenever the ABS system operates. When the ECU stores data at the time a DTC is detected, the data stored when the ABS operated is erased.
- 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.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Check the freeze frame data by following the prompts on the Techstream display.
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.: 510 msec |
- |
- |
|
Number of IG ON |
Number of times ignition switch turned to ON after storing freeze frame data/ 0 to 31 |
- |
- |
|
Buzzer |
VSC warning 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 |
- |
|
Reservoir Warning SW |
Brake fluid level warning switch/ ON or OFF |
OFF |
- |
|
Gear Position |
Gear position information/ P/N, R, 1st-10th, 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, Fail, PBA, PB, HA-CTRL, TSC, SCB, Sys or Non |
- |
ABS: ABS is activated. VSC: VSC is activated. TRAC: TRAC is activated. BA: BA is activated. HAB: HAB is activated. Fail: Fail safe mode is activated. PBA: PBA is activated. PB: PB is activated. HA-CTRL: Hill-start assist control is activated. TSC: Trailer sway control activated. SCB: Secondary collision brake is activated.* Sys: System prohibit is activated. Non: No operation is activated. HINT: *: Not supported |
|
Master Cylinder Sensor |
Master cylinder pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V |
0.3 to 0.9 V: When brake pedal released |
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 |
0 MPa/s: When brake pedal released or pedal held at constant position |
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 |
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 |
- |
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) |
0 km/h (0 mph): Vehicle stopped |
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) |
0 km/h (0 mph): Vehicle stopped |
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) |
0 km/h (0 mph): Vehicle stopped |
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) |
0 km/h (0 mph): Vehicle stopped |
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) |
0 km/h (0 mph): Vehicle stopped |
No large fluctuations when driving at a constant speed. |
|
Vehicle Speed Grade |
Vehicle acceleration/ Min.: -25.10 m/s2, Max.: 24.90 m/s2 |
0 m/s2: Vehicle stopped |
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.: 127.5 % |
0 %: When accelerator pedal released |
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, VSC Expert Mode or VSC OFF |
Normal: Normal mode TRC OFF: TRAC off mode VSC Expert Mode: VSC expert mode VSC OFF: VSC off mode |
- |
|
Operation History of IG OFF while Vehicle is moving |
History of ignition switch turned off when vehicle is in motion/ ON or OFF |
ON: History of ignition switch turned off with vehicle speed 3 km/h (2 mph) or higher OFF: No history |
- |
Fail-safe Chart
FAIL-SAFE CHART
1. FAIL SAFE OPERATION
If there is a problem with any sensor signals or hydraulic brake booster
systems, the skid control ECU prohibits the power supply to the actuator
...
Data List / Active Test
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 ...
Other materials:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the wireless charging system.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
2.
CUSTOMER PROBLEM ANALY ...
Diagnosis System
DIAGNOSIS SYSTEM
CHECK DLC3
(a) Check the DLC3.
Click here
FUNCTION OF WARNING INDICATOR AND MESSAGE
(a) If the lane departure alert system is not functioning properly, the driver
is warned by the lane departure alert indicator and multi-information display warning
message on the combinat ...
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine ...
