B1578

B1578-2B-AUDIO ANTENNA - WIRES SHORTED TOGETHER

Special Tools:










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

- When Monitored:
With the ignition on and the Telematics Gateway (TGW) in seek mode.

- Set Condition:
The TGW detects that the FM2 Diversity Antenna circuit is shorted together.





1. CHECK THE ANTENNA CONNECTION
1. Turn the ignition off.
2. Disconnect the FM2 Diversity Antenna connector at the back of the TGW.
3. Inspect the FM2 Diversity Antenna connections.

Are the Antenna connections clean and secure?

Yes

- Go To 2

No

- Repair the Antenna connection as needed.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE ANTENNA AND CABLE
1. Connect the (9977-6-FM) to the antenna connection on the back of the TGW.
2. Make sure one of the front doors is still open.
3. Using the scan tool, erase the DTCs.
4. Turn the ignition on.
5. Turn the TGW on.
6. Using the scan tool, read the active TGW DTCs.

Does the scan tool read: B1578-2B-AUDIO ANTENNA- WIRES SHORTED TOGETHER as active?

Yes

- Replace the TGW. Telematics Gateway Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. TEST THE ANTENNA CABLE
1. Disconnect the Antenna cable at the base.
2. Connect the appropriate (9977-6-1) or (9977-6-3) to the Antenna cable at the back of the TGW.
3. Connect the appropriate (9977-6-4) or (9977-6-2) to the Antenna cable at the Antenna base.
4. Measure the Resistance across the tool terminals.

Is the resistance below 47.5 Ohms?

Yes

- Use the (9977-6) to locate the short together, repair or replace the Antenna cable as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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