B1A72-12

B1A72-12-PASSIVE ENTRY ANTENNA 2 - CIRCUIT SHORT TO BATTERY





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 the Antenna 2 Signal Circuit is shorted to Battery. If another Antenna has a Short to Ground, a General Electrical Failure or Open DTC, both Antennas will set this Short to Battery DTC.





1. TEST FOR INTERMITTENT CONDITION

NOTE: If another antenna has a Short to Ground, General Electrical Failure or Open DTC, both antennas will set this Short to Voltage DTC.

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: B1A72-12-PASSIVE ENTRY ANTENNA 2 - CIRCUIT SHORT TO BATTERY 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 2 SIGNAL CIRCUIT SHORTED TO VOLTAGE




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

Is there any voltage present?

Yes

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

No

- Go To 3

3. (D923) PASSIVE ENTRY ANTENNA 2 RETURN CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Passive Entry Antenna 2 harness connector.

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

3. Measure the resistance of the (D923) Passive Entry Antenna 2 Return circuit between the RF Hub C2 harness connector and the Antenna 2 harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the RF HUB. Radio Frequency Module (RF Hub) - Removal.
- NOTE: If this vehicle is equipped with a Steering Column Lock Module (Export), 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

No

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