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Home >> Dodge and Ram >> 2018 >> Charger Pursuit, 5.7L Eng VIN T, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> (Radio Frequency (RF Hub) Module - Electrical Diagnostics) >> DTC Troubleshooting >> B1A74-01-Passive Entry Antenna 4 - General Electrical Failure >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Radio Frequency Hub (RF HUB) DTCs and record on the repair order.
    2. With the scan tool, erase DTCs.
    3. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    4. With the scan tool, read RF HUB DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • 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 and repair as necessary. If no problems are found, test complete.
  2. CHECK THE (D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Radio Frequency Hub C2 harness connector.
    3. Turn the ignition on.
      NOTE:

      To Turn 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 (D926) Passive Entry Antenna 4 Signal circuit at the Radio Frequency Hub C2 harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (D926) Passive Entry Antenna 4 Signal circuit for a short to voltage.

      No 

      • Go To  3
  3. CHECK THE (D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Measure the voltage between ground and the (D927) Passive Entry Antenna 4 Return circuit at the Radio Frequency Hub C2 harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (D927) Passive Entry Antenna 4 Return circuit for a short to voltage.

      No 

      • Go To  4
  4. CHECK THE (D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the RF Hub Module C2 harness connector.
    3. Check for continuity between ground and the (D926) Passive Entry Antenna 4 Signal circuit at the Radio Frequency Hub C2 harness connector.

      Is there continuity between ground and the (D926) Passive Entry Antenna 4 Signal circuit?

      Yes 

      • Repair the (D926) Passive Entry Antenna 4 Signal circuit for a short to ground.

      No 

      • Go To  5
  5. CHECK THE (D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (D927) Passive Entry Antenna 4 Return circuit at the Radio Frequency Hub C2 harness connector.

      Is there continuity between ground and the (D927) Passive Entry Antenna 4 Return circuit?

      Yes 

      • Repair the (D927) Passive Entry Antenna 4 Return circuit for a short to ground.

      No 

      • Go To  6
  6. CHECK THE (D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR AN OPEN 
    1. Measure the resistance of the (D926) Passive Entry Antenna 4 Signal circuit between the RF HUB C2 connector and the Passive Entry Antenna 4 connector.

      Is the resistance below 2.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (D926) Passive Entry Antenna 4 Signal circuit for an open.
  7. CHECK THE (D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT FOR AN OPEN 
    1. Measure the resistance of the (D927) Passive Entry Antenna 4 Return circuit between the RF HUB C2 connector and the Passive Entry Antenna 4 connector.

      Is the resistance below 2.0 Ohms?

      Yes 

      • Go To  8

      No 

      • Repair the (D927) Passive Entry Antenna 4 Return circuit for an open.
  8. CHECK THE (D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR A SHORT TO THE (D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT 
    1. Check for continuity between the (D926) Passive Entry Antenna 4 Signal circuit and the (D927) Passive Entry Antenna 4 Return circuit at the RF Hub C2 harness connector.

      Is there continuity between the (D926) Passive Entry Antenna 4 Signal circuit and the (D927) Passive Entry Antenna 4 Return circuit?

      Yes 

      • Repair the (D926) Passive Entry Antenna 4 Signal circuit for a short to the (D927) Passive Entry Antenna 4 Return circuit.

      No 

      • Go To  9
  9. CHECK THE PASSIVE ENTRY ANTENNA 4 AND RF HUB 
    1. Replace the Passive Entry Antenna 4 in accordance with Service Information. Refer to ANTENNA, PASSIVE ENTRY, REMOVAL .
    2. Turn the ignition on.
    3. Using the scan tool, record and erase the DTCs.
    4. With the scan tool, read the Active DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      No 

      • Test complete.
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