Diagnostic Test

WARNING: This page is about a different car, the 2012 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.

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: B1A71-12-PASSIVE ENTRY ANTENNA 1 - 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. Refer to BODY VERIFICATION TEST .
(D920) PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Passive Entry Antenna 1 Signal Circuit For A Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
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 (D920) Passive Entry Antenna 1 Signal circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (D920) Passive Entry Antenna 1 Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3.
(D921) PASSIVE ENTRY ANTENNA 1 RETURN CIRCUIT OPEN

Fig 2: Checking Passive Entry Antenna 1 Return Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Passive Entry Antenna 1 harness connector.
  NOTE:
  Antenna 1 is located in the Left Rear Door. Refer to ANTENNA, PASSIVE ENTRY, REMOVAL .
3. Measure the resistance of the (D921) Passive Entry Antenna 1 Return circuit between the RF Hub C2 harness connector and the Antenna 1 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Replace the RF HUB in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Perform the RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Repair the open in the (D921) Passive Entry Antenna 1 Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .