Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Press the ignition on.
  NOTE:
  To Press the ignition on the Passive Entry Keyless Go (PEKG)/Keyless Ignition Node (KIN) system, use the rounded end of the FOBIK to press the Stop/Start button to advance ignition positions.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, erase DTCs.
4. Press the ignition off.
5. Press the ignition on.
6. Wait 20 seconds.
7. With the scan tool, read the RF HUB DTCs.
  Are there any DTCs present in the RF HUB?
  
  Yes
  - Perform the appropriate RF HUB diagnostic test and recheck operation. Refer to DIAGNOSTIC CODE INDEX, RFH .
  - Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Go To 2
CHECK THE RKE FUNCTION OF THE FOBIK
1. While standing next to the driver door and using the FOBIK buttons, attempt to lock and unlock the doors.
  Does the RKE function properly?
  
  Yes
  - Go To 4
  No
  - Go To 3
CHECK THE FOBIK
1. Replace the FOBIK battery and recheck RKE operation.
  Does the FOBIK now operate correctly?
  
  Yes
  - Go To 4
  No
  - Replace the FOBIK and program with the scan tool and recheck operation.
  - Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
CHECK THE REMOTE START ANTENNA (RSA) (IF EQUIPPED)
1. Check the sales code of the vehicle's VIN number and see if the vehicle is equipped with Remote Start.
  Is the vehicle equipped with Remote Start?
  
  Yes
  - Go To 5
  No
  - Go To 6
CHECK THE REMOTE START ANTENNA (RSA)
NOTE:
You will need an assistant to perform the following resistance check of the RSA.
1. Disconnect the RSA harness connector from the RF HUB module.
2. Remove the RSA from the vehicle.
3. Disconnect the RSA from the coax cable.
4. Carefully place the RSA harness connector (RF HUB END) in a vice to hold the connector carefully in place.
  NOTE:
  DO NOT over tighten the vice. Harness connector damage or connector distortion may occur.
5. Set the DVOM to Mega Ohms.
6. Connect one probe to the center terminal and the other to the outer shell of the coax cable.
7. With the help of an assistant, move the antenna cable up, down and side to side in order to stress the cable and rotate the cable in it's own axis.
  NOTE:
  Verify that the coax cable measurements do not get out of the spec range of 1.6 to 2.0 Mega Ohms.
  
  Did the resistance of the coax cable go below the specified range of 1.6 to 2.0 Mega Ohms?
  
  Yes
  - Replace the coax cable and the RSA and recheck operation.
  - Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Go To 6
CHECK LF ANTENNAS
1. Verify that all LF Antennas are in the correct mounting locations on the vehicle.
2. Verify that all the LF Antennas are not blocked by any aftermarket metal shields or metal brackets that would inhibit locating the FOBIK. (police vehicles and upfitted vehicles.)
  Were there any LF Antenna concerns?
  
  Yes
  - Repair the LF Antenna concern in accordance with the Service Information and recheck operation.
  - Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Replace the Radio Frequency Hub Module (RF HUB) in accordance with the Service Information and recheck operation.
  - Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .