Diagnostic Test

WARNING: This page is about a different car, the 2012 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

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: B1A74-13-PASSIVE ENTRY ANTENNA 4 - CIRCUIT FOR AN OPEN 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 .
(D926) PASSIVE ENTRY ANTENNA 4 CIRCUIT FOR AN OPEN

Fig 1: Checking Passive Entry Antenna 4 Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Radio frequency Hub (RF HUB) C2 harness connector.
3. Measure the resistance between the (D926) Passive Entry Antenna 4 Signal circuit and the (D927) Passive Entry Antenna 4 Return circuit.
  Is the resistance between 1.5 and 3.5 Ohms?
  
  Yes
  - Replace the RF Hub in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Replace the Steering Column Lock Module in accordance with the Service Information. Refer to MODULE, SHAFT LOCK, REMOVAL .
  - Perform the RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Go To 3.
(D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR AN OPEN

Fig 2: Checking Passive Entry Antenna 4 Signal Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the Passive Entry Antenna 4 harness connector.
  NOTE:
  For antenna locations. Refer to ANTENNA, PASSIVE ENTRY, DESCRIPTION .
2. Measure the resistance of the (D926) Passive Entry Antenna 4 Signal circuit between the RF HUB C2 harness connector and the Passive Entry Antenna 4 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (D926) Passive Entry Antenna 4 Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT FOR AN OPEN

Fig 3: Checking Passive Entry Antenna 4 Return Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D927) Passive Entry Antenna 4 Return circuit between the RF HUB C2 harness connector and the Passive Entry Antenna 4 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Replace the Antenna in accordance with the service information. Refer to ANTENNA, PASSIVE ENTRY, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open in the (D927) Passive Entry Antenna 4 Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .