Description of On-Board Diagnostics
General Troubleshooting InformationSystem 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 turn the appropriate indicators on. Depending on the failure, the VSA modulator-control unit determines which indicators are turn on.
When the system is OK, each indicator comes on for about 2 seconds after turning the ignition switch ON (II), then go off.
ABS indicator
ABS indicator comes on, when ABS function is lost. The brakes still work like a conventional system.
Brake system indicator
Brake system indicator comes on, when EBD function is lost, the parking brake is applied, and/or the brake fluid level is low.
VSA indicator
VSA indicator comes on, when VSA function is lost.
VSA activation indicator
VSA activation indicator blink, when VSA function is activating. VSA activation indicator comes on, when VSA is off, or VSA function is lost.
ABS and VSA indicators go off
Each indicator will go 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 operating during regular diagnosis when the vehicle is driven over 10 mph (15 km/h) the first time after the ignition switch is turned ON (II). 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 VSA system.