Diagnostic Test
- CHECK FOR AN ACTIVE DTC NOTE:
Let the vehicle sit for 30 minutes before continuing with this test.
NOTE:This DTC must be active for the results of this test to be valid.
- Perform any Service Bulletins that may apply.
- Turn the ignition on.
- With the scan tool, read ABS DTCs and record on the repair order.
- With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
- With the scan tool, erase ABS DTCs.
- Turn the ignition off.WARNING:
To avoid possible serious or fatal injury, check brake capability is available before road testing.
- Test drive the vehicle above 40 km/h (25 mph).NOTE:
Vehicle must be driven above 40 km/h (25 mph) for set conditions to be meet.
- Park the vehicle on level ground.
- With the scan tool, read ABS DTCs.
Is the DTC active??
Yes
- Go To 2
No
- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
- CHECK FOR OCCUPANT RESTRAINT CONTROLLER (ORC) OR COMMUNICATION RELATED DTCS
- Refer to the recorded DTCs.
Are there any ORC or Communication related DTCs active?
Yes
- Perform the appropriate diagnostic procedures before continuing with this test. Refer to OCCUPANT RESTRAINT CONTROLLER (ORC) - DIAGNOSTIC CODE INDEX .
No
- Go To 3
- Refer to the recorded DTCs.
- PERFORM THE LONGITUDINAL/LATERAL SENSOR CALIBRATION ROUTINE
- Using the scan tool, under "Miscellaneous Functions" perform the Longitudinal/Lateral G-Sensor Calibration routine.
- With the scan tool, erase the DTCs.WARNING:
To avoid possible serious or fatal injury, check brake capability is available before road testing.
- Test drive the vehicle by turning the vehicle left or right in a curving manner at a speeds between 10 and 25 km/h (6 and 15 mph).
- Park the vehicle on level ground.
- With the scan tool, read the DTCs.
Does the DTC remain active?
Yes
- Perform the Longitudinal/Lateral Sensor Calibration routine again, if still unsuccessful.
- Go To 4
No
- Test Complete.
- CHECK RELATED HARNESS CONNECTIONS
- Disconnect the ABS Module harness connector.
- Disconnect all related in-line harness connections (if equipped).
- Disconnect the related component harness connectors.
- Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
- Proper connector installation.
- Damaged connector locks.
- Corrosion.
- Other signs of water intrusion.
- Weather seal damage (if equipped).
- Bent terminals.
- Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
- Terminals that have been pushed back into the connector cavity.
- Perform a terminal drag test on each connector terminal to verify proper terminal tension.
Repair any conditions that are found.
- Connect the ABS Module harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
- Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
- Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
- With the scan tool, erase DTCs.WARNING:
To avoid possible serious or fatal injury, check brake capability is available before road testing.
- Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read ABS Module DTCs.
Did the DTC return?
Yes
- Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL .
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
No
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- Test complete.