Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B1283 00: Television Antenna 1 PerformanceDTC B1284 00: Television Antenna 2 Performance
DTC B1285 00: Television Antenna 3 Performance
DTC B1286 00: Television Antenna 4 Performance
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Antenna Signal -- Left Front | B1283 00 | B1283 00 | -- | -- |
Antenna Signal -- Left Rear | B1286 00 | B1286 00 | -- | -- |
Antenna Signal -- Right Front | B1284 00 | B1284 00 | -- | -- |
Antenna Signal -- Right Rear | B1285 00 | B1285 00 | -- | -- |
Circuit/System Description
The TV antenna signal circuits consists of 4 individual coaxial cables that carry the TV signal information received by the TV antenna through the TV antenna amplifier to the TV antenna module.
Conditions for Running the DTC
| • | Ignition ON. |
| • | Battery voltage must be between 9-16 volts. |
Conditions for Setting the DTC
The TV antenna module detects a open or short to ground on one or more of the 4 TV antenna coax cables for 20 seconds.
Action Taken When the DTC Sets
The TV antenna module disables all 4 coax cables when a short to ground is detected. When the TV antenna detects an open/high resistance in one or more TV antenna coax inputs, the unaffected TV antenna coax inputs will continue to operate.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | The DTC clears after the TV function has been cycled OFF then ON. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Navigation System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the appropriate antenna harness connector at the TV tuner and the harness connector at the inoperative antenna amplifier.
- Test for less than 5 ohms between the two ends of the coax cable center conductor.
- Test for less than 5 ohms between the two ends of the coax cable outer shield.
- Test for infinite resistance between the antenna coax center conductor and the outer shield.
- Connect the harness connector at the TV tuner.
- Ignition ON, TV ON, wait 20 seconds, test for more than 1 volt at the coax cable center conductor terminal 2.
- Ignition OFF, disconnect the harness connector at the appropriate TV antenna.
- Test for less than 5 ohms between the two ends of the TV antenna coax cable center conductor.
- Test for less than 5 ohms between the two ends of the TV antenna coax cable outer shield.
- Test for infinite resistance between the TV antenna coax center conductor and the outer shield.
- Ignition OFF, TV OFF, connect the harness connector at the antenna amplifier.
- Ignition ON, TV ON, wait 20 seconds, test for more than 1 volt at the TV antenna coax cable center conductors.
- If all circuits test normal, replace the inoperative TV antenna.
| ⇒ | If greater than the specified range, replace the antenna coax cable. |
| ⇒ | If greater than the specified range, replace the antenna coax able. |
| ⇒ | If less than the specified value, replace the antenna coax cable. |
| ⇒ | If less than the specified value, replace the TV tuner. |
| ⇒ | If greater than the specified range, replace the TV antenna coax cable. |
| ⇒ | If greater than the specified range, replace the TV antenna coax able. |
| ⇒ | If less than the specified value, replace the TV antenna coax cable. |
| ⇒ | If less than the specified value, replace the antenna amplifier. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
