B156B

B156B-SATELLITE RADIO ANTENNA CIRCUIT

Special Tools:


























For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on and the Satellite Radio in seek mode.

- Set Condition:
This DTC sets when the radio is in satellite mode and detects a shorted or open antenna circuit for more than five milliseconds.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, erase all Satellite Radio DTCs.
3. Turn the ignition and radio on.
4. Put the satellite radio in seek up mode for two loops around the band cycle.
5. With the scan tool, read the DTCs.

Does the scan tool display active: B156B-Satellite Radio Antenna Circuit?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension. Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE ANTENNA AND CABLE
1. Disconnect the Satellite Radio Antenna connector at the rear of the Radio.
2. Connect the Radio Diagnostic Tool to the Satellite Antenna connection on the back of the Radio.
3. Make sure one of the front doors is still open.
4. Using the scan tool, erase the DTCs.
5. Turn the ignition on.
6. Turn the Radio on.
7. Using the scan tool, read the active Radio DTCs.

Does the scan tool display active: B156B-Satellite Radio Antenna Circuit?

Yes

- Replace the Satellite Radio.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. TEST THE SATELLITE ANTENNA CABLE
1. Disconnect the Satellite Antenna cable at the Satellite Antenna.
2. Connect the appropriate Radio Diagnostic Tool or to the Satellite Antenna cable at the back of the Radio.
3. Connect the appropriate Radio Diagnostic Tool or to the Satellite Antenna cable at the Satellite Antenna.
4. Measure the Resistance across the terminals on the tool.

Is the resistance above 52.5 Ohms or below 47.5 Ohms?

No

- Use the Radio Diagnostic Tool to locate the open or short circuit, repair or replace the Satellite Antenna cable as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Replace the Satellite Antenna.
- Perform the BODY VERIFICATION TEST. Body Verification Test.