General Troubleshooting Information

General Troubleshooting Information

System Indicator

This system has four indicators:
^ ABS indicator (A)
^ Brake system indicator (B)
^ VSA indicator (C)
^ VSA activation indicator (D)

When the system detects a problem, it turns the appropriate indicators on. Depending on the failure, the VSA modulator-control unit determines which indicators to turn on.

When the system is OK, each indicator comes on for about 2 seconds after turning the ignition switch ON (II), then goes off.





ABS indicator

The ABS indicator comes on when the ABS function is lost. The brakes still work like a conventional system.

Brake system indicator

The brake system indicator comes on when the EBD function is lost, the parking brake is applied, and/or the brake fluid level is low.

VSA indicator

The VSA indicator comes on when the VSA function is lost.

VSA activation indicator

The VSA activation indicator blinks when the VSA function is activating. The VSA activation indicator comes on when VSA is off or VSA function is lost.

ABS and VSA indicators go off

Each indicator goes off after a problem goes away, but the timing which the VSA modulator-control unit turns off the indicators varies between DTCs.
^ DTC 61 or 62: The indicators go off automatically when the system returns to normal.
^ DTC 11, 13, 15, 17, 21 *, 25, 26, 27, 31, 32, 33, 34, 35, 36, 37, 38, 45, 46, 47, 48, 54, 65, 66, 67, 68, 72, 73, 74, 75, 76, 81, 84, 91, 92, or 97 * *:

The indicators stay on until the ignition switch is turned OFF whether or not the system returns to normal.

*: There are some cases that the indicators stay on until the vehicle is driven after the system returns to normal.

* *: There are some cases that the indicators go off automatically when the system returns to normal.

^ DTC 12, 14, 16, 18, 51, 52, or 53: The indicators stay on until the vehicle is driven after the system returns to normal.

Diagnostic Trouble Code (DTC)

^ The memory can hold 10 DTCs. However, when the same DTC is detected more than once, the more recent DTC: is written over the earlier one. Therefore, when the same problem is detected repeatedly, it is memorized as a single DTC.
^ The DTCs are indicated in the order they occur.
^ The DTCs are memorized in the EEPROM. Therefore, the memorized DTCs cannot be canceled by disconnecting the battery. Do the specified procedures to clear the DTCs.

Self-diagnosis

^ Self-diagnosis can be classified into two categories:
- Initial diagnosis: Done right after the ignition switch is turned ON (II) and until the ABS and VSA indicators go off.
- Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned OFF.
^ When the system detects a problem, the VSA modulator-control unit shifts to fail-safe mode.

Kickback

The pump motor operates when the VSA modulator-control unit is functioning, and the fluid in the reservoir is forced out to the master cylinder, causing kickback at the brake pedal.

Pump Motor

^ The pump motor operates when the VSA modulator-control unit is functioning.
^ The VSA modulator-control unit checks the pump motor operation one time after completing initial diagnosis during regular diagnosis when the vehicle is driven over 10 mph (15 km/h). You may hear the motor operate at this time, but it is normal.

Brake Fluid Replacement/Air Bleeding

Brake fluid replacement and air bleeding procedures are identical to the procedures used on vehicles not equipped with the VSA system.