Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Verify that the vehicle's battery is fully charged with a DVOM and use the scan tool to compare the Battery Voltage listed under "Data" in the RFH View to that of the BCM. If the vehicle's battery is not fully charged, correct this condition before proceeding.
1. Turn the ignition on.
2. With the scan tool, read RF Hub DTCs and record on the repair order.
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 RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (D920) PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT FOR AN OPEN
1. Disconnect the Passive Entry Antenna 1 harness connector.
2. 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 3
  No
  - Repair the (D920) Passive Entry Antenna 1 Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D921) 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 4
  No
  - Repair the (D921) Passive Entry Antenna 1 Return circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D920) PASSIVE ENTRY ANTENNA 1 SIGNAL CIRCUIT FOR A SHORT TO THE (D921) PASSIVE ENTRY ANTENNA 1 RETURN CIRCUIT
1. Check for continuity between the (D920) Passive Entry Antenna 1 Signal circuit and the (D921) Passive Entry Antenna 1 Return circuit at the RF Hub C2 harness connector.
  Is there continuity between the (D920) Passive Entry Antenna 1 Signal circuit and the (D921) Passive Entry Antenna 1 Return circuit?
  
  Yes
  - Repair the (D920) Passive Entry Antenna 1 Signal circuit for a short to the (D921) Passive Entry Antenna 1 Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Passive Entry Antenna 1 in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .