Diagnostic Test
- CHECK FOR AN ACTIVE DTC 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.
- With the scan tool, erase ABS DTCs.
- Start the engine.
- Press the brake pedal firmly and release.
- With the scan tool, read ABS DTCs.
Is the DTC active?
Yes
- Go To 2
No
- Perform the ABS INTERMITTENT CONDITION TEST. Refer to: ABS INTERMITTENT CONDITION .
- CHECK FOR VACUUM PRESSURE SENSOR RELATED DTCS
- Refer to the recorded DTCs.
Are there any other ABS Vacuum related DTCs active?
Yes
- Perform the appropriate diagnostic procedures before continuing with this test. Refer to: ANTI-LOCK BRAKES (ABS) - DIAGNOSTIC CODE INDEX .
No
- Perform the diagnostic procedure for "P258B ELECTRONIC VACUUM PUMP PERFORMANCE". Refer to: 3.6L - DIAGNOSTIC CODE INDEX .
- Refer to the recorded DTCs.