| Last Modified: 11-29-2007 | 1.6 T | |
| Service Category: Brake | Section: Brake Control/Dynamic Control System | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000OS7019X |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE (2008 Sequoia) | ||
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
NOTICE:
When replacing the VSC actuator or sensor, turn the ignition switch off.
Vehicle Stability Control System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
ABS, BA and/or EBD does not operate |
Check for DTCs again and make sure that normal system code displayed |
|
|
IG power source circuit |
|
|
|
Front speed sensor circuit |
|
|
|
Rear speed sensor circuit |
|
|
|
Master cylinder pressure sensor (Check master cylinder pressure sensor by performing test mode inspection) |
|
|
|
Check VSC actuator using Techstream (Check VSC actuator operation using Active Test function). If abnormal, check hydraulic circuit for leakage. |
|
|
|
If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU) |
|
|
|
ABS, BA and/or EBD does not operate efficiently |
Check for DTCs again and make sure that normal system code displayed |
|
|
Front speed sensor circuit |
|
|
|
Rear speed sensor circuit |
|
|
|
Stop light switch circuit |
|
|
|
Master cylinder pressure sensor (Check master cylinder pressure sensor by performing test mode inspection) |
|
|
|
Check VSC actuator using Techstream (Check VSC actuator operation using Active Test function). If abnormal, check hydraulic circuit for leakage. |
|
|
|
If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU) |
|
|
|
VSC and/or TRAC does not operate |
Check for DTCs again and make sure that normal system code displayed |
|
|
IG power source circuit |
|
|
|
Fluid leaks in brake system |
- |
|
|
Front speed sensor circuit |
|
|
|
Rear speed sensor circuit |
|
|
|
Yaw rate and deceleration sensor circuit |
|
|
|
Steering angle sensor circuit |
|
|
|
If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU) |
|
|
|
Sensor signal check cannot be performed |
TS and CG terminal circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
DTC check cannot be performed |
Check for DTCs again and make sure that normal system code displayed |
|
|
TC and CG terminal circuit |
|
|
|
If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU) |
|
|
|
ABS warning light abnormal (Remains on) |
ABS warning light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
ABS warning light abnormal (Does not come on) |
ABS warning light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
BRAKE warning light abnormal (Remains on) |
BRAKE warning light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
BRAKE warning light abnormal (Does not come on) |
BRAKE warning light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
SLIP indicator light abnormal (Remains on) |
SLIP indicator light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
SLIP indicator light abnormal (Does not come on) |
SLIP indicator light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
VSC OFF indicator light abnormal (Remains on) |
VSC OFF indicator light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
VSC OFF indicator light abnormal (Does not come on) |
VSC OFF indicator light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
AUTO LSD indicator light abnormal (Remains on) |
AUTO LSD indicator light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
AUTO LSD indicator light abnormal (Does not come on) |
AUTO LSD indicator light circuit |
|
|
VSC actuator (skid control ECU) |
|
|
|
Skid control buzzer abnormal |
Skid control buzzer circuit |
|
|
VSC actuator (skid control ECU) |
|
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