Scan Tool Data Definitions

Use the scan tool data display values and definitions information in order to assist in diagnosing vehicle malfunctions. Compare the vehicles actual scan tool data display with the typical data value in the table. Use the data in order to aid in understanding the nature of the concern when the vehicle data display does not match the typical data values. Refer to Scan Tool Data List .

The typical scan tool data values were taken from a known good vehicle under the following conditions:

• The ignition switch is in the ON position.
• The windshield wiper/washer switch is OFF.

Low Washer Fluid

This input displays the washer fluid level. Low is displayed when the level is Low and OK is displayed if it is above the switch threshold.

Wiper High Speed Switch

This input displays On if the wiper washer switch is in the Hi position.

Wiper Motor Low/Hi Speed Relay

This output displays the state of the wiper Hi relay. On is wipers Hi speed and Off is wipers Low speed.

Wiper Motor Park Switch

The body control module (BCM) uses this input to determine if the wipers are approaching the park position. The scan tool displays Active when the BCM detects ground on the windshield wiper motor park switch signal circuit.

Wiper Motor Relay

This output displays whether or not the BCM is providing voltage for the wiper relay. ON is displayed when the BCM detects the correct signal from the windshield wiper switch.

Wiper Washer Motor

This output displays the operation mode of the washer pump.

Wiper Washer Switch

The BCM uses this input to determine if the wash switch is depressed. If it is depressed, the BCM commands the wiper 1 relay ON and keeps it ON until 2 wipe cycles have completed after the switch has been released.