| Last Modified: 11-29-2007 | 1.6 U | |
| Service Category: Brake | Section: Brake Control/Dynamic Control System | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000XGC00RX |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DATA LIST / ACTIVE TEST (2008 Sequoia) | ||
DATA LIST / ACTIVE TEST
1. READ 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 parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Read the Data List according to the display on the Techstream.
ABS/VSC/TRAC
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
ABS Warning Light |
ABS warning light / ON or OFF |
ON: Warning light ON OFF: Warning light OFF |
- |
|
VSC Warning Light |
VSC OFF indicator light / ON or OFF |
ON: Indicator light ON OFF: Indicator light OFF |
- |
|
Brake Warning Light |
Brake warning light / ON or OFF |
ON: Warning light ON OFF: Warning light OFF |
- |
|
Slip Indicator Light |
SLIP indicator light / ON or OFF |
ON: Indicator light ON OFF: Indicator light OFF |
- |
|
Buzzer |
Skid control 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 |
- |
|
TRC(TRAC)/VSC OFF SW |
VSC OFF switch / ON or OFF |
ON: VSC OFF switch ON OFF: VSC OFF switch OFF |
- |
|
Gear Position |
Gear position information / P/N, R, 1st-6th, FAIL, NOT R |
Actual gear position |
- |
|
Shift Information |
Shift information / ON or OFF |
ON: During gear change OFF: Not during gear change |
- |
|
Inspection Mode |
Inspection mode / OTHER or INSPECT |
OTHER: Normal mode INSPECT: Inspection mode |
- |
|
Number of IG ON (Inspection) |
Number of ignition switch ON operations after entering the inspection mode / min.: 0, max.: 255 |
Min.: 0 Max.: 255 |
- |
|
Master Cylinder Sensor |
Master cylinder pressure sensor 1 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 |
|
Zero Point of M/C |
Memorized zero point value of master cylinder pressure sensor / min.: -12.5 MPa, max.: 12.4 MPa |
Min.: -12.5 MPa Max.: 12.4 MPa |
- |
|
Stroke Sensor |
Stroke sensor / min.: 0 V, max.: 5 V |
When brake pedal is released: 0.7 to 1.9 V |
- |
|
Voltage of Stroke Sensor |
Voltage of stroke sensor / min.: -2.5 V, max.: 2.49 V |
When brake pedal is released: 0.7 to 1.9 V |
- |
|
Voltage of Stroke Sensor2 |
Voltage of stroke sensor / min.: -2.5 V, max.: 2.49 V |
When brake pedal is released: 0.7 to 1.9 V |
- |
|
Deceleration Sensor |
Acceleration sensor 1 reading / min.: -1.869 G, max.: 1.869 G |
Approximately -0.13 to 0.13 G while stationary |
Reading changes when vehicle is bounced |
|
Zero Point of Decele |
Memorized zero value / min.: -25.11 m/s2, max.: 24.91 m/s2 |
Min.: -1.7 m/s2 Max.: 1.7 m/s2 |
- |
|
Deceleration Sensor2 |
Acceleration sensor 2 reading / min.: -1.869 G, max.: 1.869 G |
Approximately -0.13 to 0.13 G while stationary |
Reading changes when vehicle is bounced |
|
Zero Point of Decele2 |
Memorized zero value / min.: -25.11 m/s2, max.: 24.91 m/s2 |
Min.: -1.7 m/s2 Max.: 1.7 m/s2 |
- |
|
Yaw Rate Sensor |
Yaw rate sensor 1 / min.: -92°/sec., max.: 92°/sec. |
Approximately -3.5 to 3.5°/sec. while stationary |
- |
|
Steering Angle Sensor |
Steering angle sensor / min.: -3276.8°, max.: 3276.7° |
Left turn: Increase Right turn: Decrease |
- |
|
Zero Point of Steering Angle |
Memorized zero value / min.: -3276.8°, max.: 3276.7° |
Min.: -3276.8° Max.: 3276.7° |
- |
|
Lateral G |
Lateral G / min.: -25.11 m/sec.2, max.: 24.91 m/sec.2 |
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 |
Min.: -25.11 m/sec.2 Max.: 24.91 m/sec.2 |
- |
|
Yaw Rate Value |
Yaw rate value / min.: -92°/sec., max.: 92°/sec. |
Approximately -3.5 to 3.5°/sec. while stationary |
- |
|
Steering Angle Value |
Steering angle value / min.: -3276.8°, max.: 3276.7° |
Min.: -3276.8° Max.: 3276.7° |
- |
|
FR Wheel Speed |
Front wheel speed sensor RH reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) |
Actual wheel speed |
Similar speed as indicated on speedometer |
|
FL Wheel Speed |
Front wheel speed sensor LH reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) |
Actual wheel speed |
Similar speed as indicated on speedometer |
|
RR Wheel Speed |
Rear wheel speed sensor RH reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) |
Actual wheel speed |
Similar speed as indicated on speedometer |
|
RL Wheel Speed |
Rear wheel speed sensor LH reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) |
Actual wheel speed |
Similar speed as indicated on speedometer |
|
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 |
|
FR Wheel Acceleration |
Front wheel acceleration RH / min.: -200.84 m/sec.2, max.: 199.27 m/sec.2 |
Min.: -200.84 m/sec.2 Max.: 199.27 m/sec.2 |
- |
|
FL Wheel Acceleration |
Front wheel acceleration LH / min.: -200.84 m/sec.2, max.: 199.27 m/sec.2 |
Min.: -200.84 m/sec.2 Max.: 199.27 m/sec.2 |
- |
|
RR Wheel Acceleration |
Rear wheel acceleration RH / min.: -200.84 m/sec.2, max.: 199.27 m/sec.2 |
Min.: -200.84 m/sec.2 Max.: 199.27 m/sec.2 |
- |
|
RL Wheel Acceleration |
Rear wheel acceleration LH / min.: -200.84 m/sec.2, max.: 199.27 m/sec.2 |
Min.: -200.84 m/sec.2 Max.: 199.27 m/sec.2 |
- |
|
FR Wheel ABS Ctrl Status |
Front wheel RH ABS control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
FL Wheel ABS Ctrl Status |
Front wheel LH ABS control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
RR Wheel ABS Ctrl Status |
Rear wheel RH ABS control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
RL Wheel ABS Ctrl Status |
Rear wheel LH ABS control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
FR Wheel EBD Ctrl Status |
Front wheel RH EBD control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
FL Wheel EBD Ctrl Status |
Front wheel LH EBD control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
RR Wheel EBD Ctrl Status |
Rear wheel RH EBD control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
RL Wheel EBD Ctrl Status |
Rear wheel LH EBD control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
BA Ctrl Status |
BA control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
TRC(TRAC) Ctrl Status |
TRAC control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
TRC(TRAC) Engine Ctrl Status |
TRAC engine control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
TRC(TRAC) Brake Ctrl Status |
TRAC brake control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
FR Wheel VSC Ctrl Status |
Front wheel RH VSC control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
FL Wheel VSC Ctrl Status |
Front wheel LH VSC control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
RR Wheel VSC Ctrl Status |
Rear wheel RH VSC control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
RL Wheel VSC Ctrl Status |
Rear wheel LH VSC control status / ON or OFF |
ON: During control OFF: Not during control |
- |
|
Engine Revolutions |
Engine speed / min.: 0 rpm, max.: 65535 rpm |
Min.: 0 rpm Max.: 65535 rpm |
- |
|
Real engine Torque |
Real engine torque / min.: -1024 N*m, max.: 1023 N*m |
Min.: -1024 N*m, Max.: 1023 N*m |
- |
|
Solenoid Relay |
Solenoid relay / ON or OFF |
ON: Solenoid relay ON OFF: Solenoid relay OFF |
- |
|
Electronically Controlled Brake System Motor Relay |
Electronically controlled brake system motor relay / ON or OFF |
ON: Motor relay ON OFF: Motor relay OFF |
- |
|
TR(A)C/VSC Solenoid (SM2) |
TRAC/VSC solenoid (SM2) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
TR(A)C/VSC Solenoid (SM1) |
TRAC/VSC solenoid (SM1) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
TR(A)C/VSC Solenoid (SRC2) |
TRAC/VSC solenoid (SRC2) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
TR(A)C/VSC Solenoid (SRC1) |
TRAC/VSC solenoid (SRC1) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SFRH)*1 |
ABS solenoid (SFRH) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SFRR)*2 |
ABS solenoid (SFRR) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SFLH)*3 |
ABS solenoid (SFLH) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SFLR)*4 |
ABS solenoid (SFLR) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SRRH)*5 |
ABS solenoid (SRRH) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SRRR)*6 |
ABS solenoid (SRRR) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SRLH)*7 |
ABS solenoid (SRLH) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
ABS Solenoid (SRLR)*8 |
ABS solenoid (SRLR) / ON or OFF |
ON: Operates OFF: Does not operate |
- |
|
TRAC/VSC off Mode |
TRAC and VSC OFF mode status / 0, 1 or 3 |
0: Normal 1: TRAC OFF mode 2: VSC OFF mode (4WD mode) 3: VSC OFF mode (2WD mode) |
- |
|
Number of DTC |
Number of DTCs / min.: 0, max.: 255 |
Min.: 0 Max.: 255 |
- |
HINT:
- *1: SFRH (S: Solenoid, F: Front, R: Right, H: Holding)
- *2: SFRR (S: Solenoid, F: Front, R: Right, R: Reduction)
- *3: SFLF (S: Solenoid, F: Front, L: Left, H: Holding)
- *4: SFLR (S: Solenoid, F: Front, L: Left, R: Reduction)
- *5: SRRH (S: Solenoid, R: Rear, R: Right, H: Holding)
- *6: SRRR (S: Solenoid, R: Rear, R: Right, R: Reduction)
- *7: SRLH (S: Solenoid, R: Rear, L: Left, H: Holding)
- *8: SRLR (S: Solenoid, R: Rear, L: Left, R: Reduction)
2. PERFORM ACTIVE TEST
HINT:
Using the Techstream to perform the Active Tests allows relays, VSVs and actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Perform the Active Test according to the display on the Techstream.
HINT:
- The ignition switch must be turned ON to proceed to the Active Test using the Techstream.
- The Active Tests of the ABS solenoid, ABS motor relay, ABS warning light and BRAKE warning light are available when the vehicle is stopped.
- The motors stop automatically after 5 seconds of activation to prevent them from being damaged. When the motors are driven repeatedly, certain intervals are required.
- Each solenoid stops automatically after 2 seconds of activation to prevent them from being damaged, and can be operated again after a certain interval.
- Do not depress the brake pedal while only the pressure reduction solenoid valves are on.
- Do not drive 2 or more solenoids simultaneously except to operate the pressure holding solenoid valves and pressure reduction solenoid valves of each wheel.
ABS/VSC/TRAC
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
ABS Warning Light |
ABS warning light |
Warning light ON/OFF |
Observe combination meter |
|
VSC Warning Light |
VSC OFF indicator light |
Indicator light ON/OFF |
Observe combination meter |
|
Brake Warning Light |
Brake warning light |
Warning light ON/OFF |
Observe combination meter |
|
Slip Indicator Light |
SLIP indicator light |
Indicator light ON/OFF |
Observe combination meter |
|
Auto LSD Indicator Light |
AUTO LSD indicator light |
Indicator light ON/OFF |
Observe combination meter |
|
Buzzer |
Skid control buzzer |
Buzzer ON/OFF |
Buzzer can be heard |
|
Solenoid Relay |
ABS solenoid relay |
Relay ON/OFF |
- |
|
Motor Relay |
ABS motor relay |
Relay ON/OFF |
Operation sound of motor can be heard |
|
Stop Light Relay |
Stop light operation relay |
Relay ON/OFF |
Observe rear combination light (stop light) (Does not come on for 5 sec. or more) |
|
ABS Solenoid (SRLR) |
ABS solenoid (SRLR) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SRLH) |
ABS solenoid (SRLH) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SRRR) |
ABS solenoid (SRRR) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SRRH) |
ABS solenoid (SRRH) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SFLR) |
ABS solenoid (SFLR) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SFLH) |
ABS solenoid (SFLH) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SFRR) |
ABS solenoid (SFRR) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
ABS Solenoid (SFRH) |
ABS solenoid (SFRH) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
VSC/TRAC Solenoid (SRMR) |
VSC/TRAC solenoid (SRMR) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
VSC/TRAC Solenoid (SRMF) |
VSC/TRAC solenoid (SRMF) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
VSC/TRAC Solenoid (SRCR) |
VSC/TRAC solenoid (SRCR) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
VSC/TRAC Solenoid (SRCF) |
VSC/TRAC solenoid (SRCF) |
Solenoid ON/OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
|