B1A72-11

B1A72-11-PASSIVE ENTRY ANTENNA 2 - CIRCUIT SHORT TO GROUND





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

Theory of Operation

For the Theory of Operation, Passive Entry Antenna - Operation.

- When Monitored:
At every Passive Entry or Keyless Go action. Also during the self test routine which is six seconds after an ignition transition to On.

- Set Condition:
When Antenna 2 Signal circuit is shorted to ground. If another Antenna Signal circuit is Open and there are no other Antennas that have a Short to Battery DTC, both Antennas will set this Short to Ground DTC.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using the scan tool, record and erase the DTCs.
3. With the scan tool, select: RF Hub, More Options and System Tests.
4. Perform the RF Hub LF Antenna Verification Tests.
5. With the scan tool, read the Active DTCs.

Does the scan tool display: B1A72-11-PASSIVE ENTRY ANTENNA 2 - CIRCUIT SHORT TO GROUND as active?

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.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (D922) PASSIVE ENTRY ANTENNA SHORTED
1. Turn the ignition off.
2. Disconnect the Passive Entry Antenna 2 connector.

NOTE: Antenna 2 is located in the Right Rear Door. . Rear Door

3. Turn the ignition on.
4. Using the scan tool, record and erase the DTCs.
5. With the scan tool, select: RF Hub, More Options and System Tests.
6. Perform the RF Hub LF Antenna Verification Tests.
7. With the scan tool, read the Active DTCs.

Does the scan tool display: B1A72-11-PASSIVE ENTRY ANTENNA 2 - CIRCUIT SHORT TO GROUND as active?

Yes

- Go To 3

No

- Replace the Antenna. Passive Entry Antenna - Removal
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (D922) PASSIVE ENTRY ANTENNA 2 SIGNAL CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the RF Hub Module C2 harness connector.
3. Measure the resistance between ground and the (D922) Passive Entry Antenna 2 Signal circuit.

Is the resistance below 30K Ohms?

Yes

- Repair the short to ground in the (D922) Passive Entry Antenna 2 Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (D923) PASSIVE ENTRY ANTENNA 2 RETURN CIRCUIT SHORTED TO GROUND




1. Measure the resistance between ground and the (D923) Passive Entry Antenna 2 Return circuit.

Is the resistance below 30K Ohms?

Yes

- Repair the short to ground in the (D923) Passive Entry Antenna 2 Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. (D922) PASSIVE ENTRY ANTENNA 2 SIGNAL CIRCUIT SHORTED TO THE (D923) PASSIVE ENTRY ANTENNA 2 RETURN CIRCUIT OPEN




1. Measure the resistance between the (D922) Passive Entry Antenna 2 Signal circuit and the (D923) Passive Entry Antenna 2 Return circuit.

Is the resistance below 30K Ohms?

Yes

- Repair the short between the (D922) Passive Entry Antenna 2 Signal circuit and the (D923) Passive Entry Antenna 2 Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the RF Hub. Radio Frequency Module (RF Hub) - Removal.
- NOTE: If this vehicle is equipped with a Steering Column Lock Module, it MUST be replaced also.

- Replace the Steering Column Lock Module. Shaft Lock Module - Removal
- Perform the RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST. RF Hub Verification Test