Speed Compensated Volume

WARNING: This page is about a different car, the 2004 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Radio/Audio System Schematics (non Class 2 Amplifier) or Radio/Audio System Schematics (Class 2 Amplifier) Definition: Volume will not compensate for road speed.
1	Did you perform the Diagnostic System Check - Entertainment?	Go to Step 2	Go to Diagnostic System Check - Entertainment System
2	Turn ON the ignition, with the engine OFF. Turn ON the radio. Turn ON the Speed Compensated Volume (SCV) control located on the radio. Perform a road test of the vehicle at various speeds in order to fully test the SCV. An operative SCV system will adjust the radio volume up as the vehicle speed is increased. Refer to Radio/Audio System Description and Operation for additional information. Does the system operate normally?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Turn OFF the ignition. Disconnect the radio. Test the vehicle speed signal circuit of the radio for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 6	Go to Step 4
4	Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 6	Go to Step 5
5	Replace the radio. Refer to Radio Replacement in Entertainment. Did you complete the replacement?	Go to Step 6	-
6	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2