Step
| Action
| Value(s)
| Yes
| No
|
Schematic Reference:
Radio/Audio System Schematics
Connector End View Reference:
Entertainment Connector End Views
|
1
| Did you perform the Diagnostic System Check - Vehicle?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Vehicle
in Vehicle DTC Information
|
2
|
- Turn ON the ignition, with the engine OFF.
- Turn ON the radio.
- Tune the radio to a known strong AM station, then tune to a known strong
FM station.
Is the radio reception clear?
| --
| Go to
Audio System Troubleshooting Hints
| Go to
Step 3
|
3
|
- Turn OFF the ignition.
- Disconnect the negative battery cable.
- Remove the radio. Refer to
Radio Replacement
.
Important:: Always zero out the DMM before taking a
resistance measurement in order to ensure an accurate reading.
- Measure the resistance between the negative battery cable and the radio antenna
coaxial ground at the radio.
Does the resistance measure greater than the specified value?
| 0.20 ohms
| Go to
Step 4
| Go to
Step 5
|
4
|
- Grasp the antenna mast.
- Monitor the DMM and wiggle the antenna mast.
- Continue to monitor the DMM and wiggle the radio antenna coaxial cable.
Does the DMM display intermittent continuity?
| --
| Go to
Step 6
| Go to
Step 5
|
5
|
- Remove the antenna coaxial lead-in connector from the radio.
- Measure the resistance between the antenna coaxial lead-in connector (center
conductor) and the antenna mast. Refer to
Circuit Testing
in Wiring Systems.
Does the resistance measure greater than the specified values?
| RG-58/RG-59 Coax: 0.2 ohms
RG-62/RG-62M Coax: 3.5 ohms
| Go to
Step 7
| Go to
Step 8
|
6
|
- Inspect the base of the antenna for a poor connection to body ground.
- Inspect the antenna coaxial cable interconnects for a poor connection
or corrosion. Refer to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems.
- Test for an open or high resistance from the battery negative cable to
body ground. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 9
| Go to
Step 7
|
7
| Replace the antenna coaxial cable. Refer to
Radio Antenna Cable Extension Cable Replacement
.
Did you complete the replacement?
| --
| Go to
Step 9
| --
|
8
|
- Test for continuity between the antenna coaxial cable center conductor
and metal case.
- Test at the opposite end of the antenna cable also.
Did you measure continuity?
| --
| Go to
Step 7
| Go to
Audio System Troubleshooting Hints
|
9
| Operate the system in order to verify the repair.
Did you correct the condition?
| --
| System OK
| Go to
Step 2
|
