Auxiliary Air Control (AAC) Valve Circuit

��b2AAC Valve Circuit Test:

CIRCUIT TEST IMAGE

AAC Valve Circuit Diagram:

CIRCUIT DIAGRAM IMAGE

AAC And ECU Connectors:

AAC VALVE CONNECTOR IMAGE

Jumper Wire:

ALTERNATE METHOD
The following is an alternate method of providing the AAC valve fully closed signal.
1. Access the connector for the checker box, located above the park brake release handle.
2. Using a suitable jumper wire, connect terminals #2 and #3.
This will close the AAC valve.
3. Removing the jumper will open the valve.