BAC Valve Operation Inspection

BAC VALVE OPERATION INSPECTION




- Connect the Special Service Tools (SST)s (System Selector) to the data link connector.
- Set switch A to position 1.
- Set the test switch to SELF TEST.

Special Service Tool New Generation Star Tester Connected to Data Link Connector 2:

4. Connect the SSTs New Generation Star (NGS) tester to the data link connector-2.




- Select the PID/DATA MONITOR AND RECORD function.
- Verify that the engine is cold condition, and start the engine.
- Select the "RPM" on the NGS display.
- Verify that the engine speed decreases as the engine warms up.
- Disconnect the SST (System Selector).
- If the engine speed will not decrease or decreases slowly, check the water hose connected to BAC valve for leakage and clogs.
- If the water hose is OK, inspect the following.
- Air valve.
- Idle Air Control valve.