The Scan Tool becomes part of the electronic system of the
vehicle when it is plugged into the DLC.
The Scan Tool can perform the following functions:
| • | Display the ABS/TCS data |
| • | Display and clear ABS/TCS diagnostic trouble codes |
| • | Control the ABS/TCS components |
| • | Perform extensive ABS/TCS diagnosis |
| • | Provide the diagnostic testing for intermittent ABS/TCS conditions |
Each test mode has specific diagnosis capabilities which depend upon
various keystrokes.
In general, the Scan Tool has five test modes for diagnosing the antilock
brake system:
| | In this test mode, the Scan Tool continuously monitors the following
conditions: |
| • | Other inputs and outputs |
| • | Items on Data List 2 cannot be read if a DTC is present. |
| | The ABS/TCS system has no DTC history capabilities. |
| • | Diagnostic Trouble Codes: |
| | In this test mode, diagnostic trouble codes stored by the EBCM/EBTCM
may be displayed or cleared. |
| | In this test mode, the Scan Tool captures ABS/TCS data at the following
moments: |
| • | Before and after a malfunction occurrence |
| • | From a forced manual snapshot trigger |
| • | Items in Snapshot 2 cannot be read until the DTCs are cleared from the
memory. |
| | In this test mode, the Scan Tool performs hydraulic modulator functional
tests. These tests assist in isolating the problem during troubleshooting. |
| | Tests cannot be performed until all of the stored DTCs have been cleared
from the memory. |
For more information, refer to the Chassis section of the Scan Tool
Operators Manual.
