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 will turn the appropriate indicator on. Depending on the failure, the VSA modulator-control unit determines which indicators are turned on. When the system is OK, each indicator comes on for about 2 seconds after turning the ignition switch to 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 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 the VSA is turned OFF by using the VSA OFF switch, or the VSA function is lost.

ABS/VSA Indicator

^ If the system is OK, the ABS and VSA indicators go off 2 seconds after turning the ignition switch to ON (II).
^ The ABS and VSA indicators come on when the control unit detects a problem in the system. However, even though the system is operating properly, the indicator may come on under these conditions:

- Only the drive wheels rotate.
- One drive wheel is stuck.
- The vehicle goes into a spin.
- The ABS or VSA continues to operate for a long time.
- The vehicle is subjected to an electrical signal disturbance.

To determine the actual cause of the problem, question the customer, taking these conditions into consideration.

^ When a problem is detected, there are cases when the indicator stays on until the ignition switch is turned to LOCK (0), and cases when the indicator goes off automatically when the system returns to normal.

- DTC 61 or 62:
The ABS and VSA indicators go off automatically when the system returns to normal.
- DTC 31, 32, 33, 34, 35, 36, 37, 38, 54, 81, 121, 122, 123 or 124:
The ABS and VSA indicators stay on until the ignition switch is turned to LOCK (0) whether or not the system returns to normal.
- DTC 11, 12, 13, 14, 15, 16, 17, 18, 21, 22, 23, 24, 51 or 52:
The ABS and VSA indicators stay on until the system returns to normal after the engine is restarted, and the vehicle is driven.
- DTC 25, 26, 27, 64, 6.5, 66, 68, 83, 86, 91, 104 or 105:
The VSA indicator stays on until the ignition switch is turned to LOCK (0) whether or not the system returns to normal.
- DTC 84:
The VSA activation indicator go off automatically when the system returns to normal.

Diagnostic Trouble Code (DTC)

^ The memory can hold any number of 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 ascending number order, not in the order they occur.
^ The DTCs are memorized in the EEPROM. Therefore, the memorized DTCs cannot be erased 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 to 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 to LOCK (0).

^ 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 12 mph (20 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 without the VSA system.