Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics Connector Reference: Entertainment Connector End Views | ||||
1 | Did you review the Radio/Audio System Description and Operation and perform the necessary inspections? | -- | Go to Step 2 | |
2 |
Is the radio reception clear? | -- | Go to Step 3 | Go to Step 4 |
3 | Turn ON the rear defogger. Is the radio reception clear? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 5 |
4 | Inspect for proper connections at the rear window antenna and the radio antenna 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 26 | Go to Step 6 |
5 | Connect the base of the rear defogger/antenna grid to chassis ground. Does the reception improve? | -- | Go to Step 13 | Go to Step 12 |
6 | Is there poor or no reception only on AM? | -- | Go to Step 11 | Go to Step 7 |
7 | Is there poor or no reception only on FM? | -- | Go to Step 12 | Go to Step 8 |
8 |
Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 14 |
9 |
Important:: Always zero the DMM before taking a resistance measurement to ensure an accurate reading. Does the resistance measure greater than the specified value? | 1.0 ohms | Go to Step 22 | Go to Step 10 |
10 |
Important:: Always zero the DMM before taking a resistance measurement to ensure an accurate reading. Measure resistance of the antenna cable center conductor between the radio and the radio antenna module. Does the resistance measure greater than the specified value? | 1.0 ohms | Go to Step 22 | Go to Step 20 |
11 | Test the AM antenna grid for an open. Refer to Defogger Grid Lines Diagnosis in Stationary Windows. Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 15 |
12 | Test the rear defogger grid for an open. Refer to Defogger Grid Lines Diagnosis in Stationary Windows. Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 16 |
13 | Test the ground coil input circuit for a high resistance, open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 17 |
14 | Test the antenna relay coil supply voltage circuit of the radio antenna module for a high resistance, open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 20 |
15 | Test the AM antenna grid circuit between the radio antenna module and the AM antenna grid for a high resistance, open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 19 |
16 | Test the FM antenna grid circuit between the radio antenna module and the FM antenna grid for a high resistance, open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 19 |
17 | Inspect for poor connections at the harness connector of the ground coil. 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 26 | Go to Step 21 |
18 | Inspect for poor connections at the harness connector of the rear defogger grid. 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 26 | Go to Step 23 |
19 | Inspect for poor connections at the harness connector of the radio antenna 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 26 | Go to Step 24 |
20 | 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 26 | Go to Step 25 |
21 | Replace the ground coil. Refer to Antenna Module Coil Replacement . Did you complete the replacement? | -- | Go to Step 26 | -- |
22 | Replace the coax cable. Refer to Coaxial Cable Replacement . Did you complete the replacement? | -- | Go to Step 26 | -- |
23 | Replace the rear window. Refer to Rear Window Replacement in Stationary Windows. Did you complete the replacement? | -- | Go to Step 26 | -- |
24 | Replace the radio antenna module. Refer to Radio Antenna Module Replacement . Did you complete the replacement? | -- | Go to Step 26 | -- |
25 | Replace the radio. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | -- | Go to Step 26 | -- |
26 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
