Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE:
If there are any antennas that have a Short to Ground or Short to Battery DTC, repair them before proceeding.
1. Cycle 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. Refer to STANDARD PROCEDURE .
5. With the scan tool, read the Active DTCs.
  Does the scan tool display this DTC 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.
CHECKING THE PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Cycle the ignition off.
2. Disconnect the Radio Frequency Hub C2 harness connector.
3. Cycle the ignition on.
  NOTE:
  To cycle the ignition on the Passive Entry Keyless Go (PEKG)/Keyless Ignition Node (KIN) system when the RF Hub C2 connector is disconnected, use the rounded end of the FOBIK to press the Stop/Start button.
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.
  No
  - Go To 3
CHECKING THE PASSIVE ENTRY ANTENNA 1 RETURN CIRCUIT FOR A SHORT TO VOLTAGE
1. Be sure the ignition is still on.
2. Measure the voltage between ground and the (D921) Passive Entry Antenna 1 Return circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (D921) Passive Entry Antenna 1 Return circuit.
  No
  - Go To 4
CHECKING THE PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Cycle the ignition off.
2. Disconnect the RF Hub Module C2 harness connector.
3. Measure the resistance between ground and the (D920) Passive Entry Antenna 1 Signal circuit.
  Is the resistance below 30K Ohms?
  
  Yes
  - Repair the short to ground in the (D920) Passive Entry Antenna 1 Signal circuit.
  No
  - Go To 5
CHECKING THE PASSIVE ENTRY ANTENNA 1 RETURN CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the (D921) Passive Entry Antenna 1 Return circuit.
  Is the resistance below 30K Ohms?
  
  Yes
  - Repair the short to ground in the (D921) Passive Entry Antenna 1 Return circuit.
  No
  - Go To 6
CHECKING THE PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D920) Passive Entry Antenna 1 Signal circuit between the RF HUB C2 connector and the Passive Entry Antenna 1 connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 7
  No
  - Repair the open in the (D920) Passive Entry Antenna 1 Signal circuit.
CHECKING THE PASSIVE ENTRY ANTENNA 1 RETURN CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D921) Passive Entry Antenna 1 Return circuit between the RF HUB C2 connector and the Passive Entry Antenna 1 connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 8
  No
  - Repair the open in the (D921) Passive Entry Antenna 1 Return circuit.
CHECKING THE PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT BEING SHORTED TO THE PASSIVE ENTRY ANTENNA 1 RETURN CIRCUIT
1. Measure the resistance between the (D920) Passive Entry Antenna 1 Signal circuit and the (D921) Passive Entry Antenna 1 Return circuit in the RF Hub C2 harness connector.
  Is the resistance below 30K Ohms?
  
  Yes
  - Repair the short between the (D920) Passive Entry Antenna 1 Signal circuit and the (D921) Passive Entry Antenna 1 Return circuit.
  No
  - Go To 9
CHECKING THE PASSIVE ENTRY ANTENNA 1 AND RF HUB
1. Replace the Passive Entry Antenna 1 in accordance with Service Information. Refer to REMOVAL .
2. Cycle the ignition on.
3. Using the scan tool, record and erase the DTCs.
4. With the scan tool, select: RF Hub, More Options and System Tests.
5. Perform the RF Hub LF Antenna Verification Tests. Refer to STANDARD PROCEDURE .
6. With the scan tool, read the Active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Replace the RF Hub in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  No
  - Test complete.