Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics | |||
1 | Did you perform the Radio/Audio System Diagnostic System Check? | Go to Step 2 | |
2 |
Is the volume reduced in one or more speakers? | Go to Step 3 | |
3 | Is the vehicle equipped with UQ4? | Go to Step 4 | Go to Step 7 |
4 | Is the volume reduced in all speakers on one side of the vehicle? | Go to Step 5 | Go to Step 6 |
5 | Test the low level audio signal circuits of the appropriate speaker channel between the radio and the radio interface module for an open, short, or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
6 | Test the speaker output circuits of the appropriate speaker for an open, short, or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
7 | Test the speaker output circuits of the appropriate speaker for an open, short, or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
8 | 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 12 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the radio interface module. 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 12 | Go to Step 11 |
10 | Replace the radio. Refer to Radio Replacement . Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the radio interface module. Refer to Radio Speaker Amplifier Replacement . Did you complete the replacement? | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
