Part 1 of 2

CIRCUIT DESCRIPTION:
Refer to DTC 21. (Part 1 of 2)

FAILURE CONDITION:
DTC 25 can be set when the Brake is off. The purpose of this test to detect a situation in which the left front wheel acceleration or deceleration is beyond specified limits.

ACTION TAKEN:
A DTC 25 is stored, ABS is disabled and the "ABS" warning light is turned on.

TEST DESCRIPTION:
Number(s) below refer to circled Number(s) on the diagnostic chart.
1. This test verifies whether the malfunction is currently present.
2. This test checks to see if excessive wheel bearing end play caused the DTC.
3. This step will identify a wheel speed sensor or circuitry that is damaged and visibly apparent.
4. This test checks wheel speed sensor for proper resistance values.
5. This test ensures the wheel speed sensor and sensor ring generate the proper voltage.
6. This step ensures the wheel speed sensor is not shorted to ground.

DIAGNOSTIC AIDS:
Refer to DTC 21. (Part 1 of 2)