Diagnostic Test

WARNING: This page is about a different car, the 2019 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
Verify the battery is fully charged before continuing.
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. Try to start the engine.
4. With the scan tool, read RF Hub DTCs and wait one minute.
  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 (A910) FUSED B+ OR (Z910) GROUND CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Keyless Ignition Node harness connector.
3. Connect a 12 volt test light between the (A910) Fused B+ circuit and the (Z910) Ground circuit.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Test the (A910) Fused B+ and (Z910) Ground circuits to determine where the high resistance is. Repair the high resisted circuit as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D122) SECURITY K LINE COMMUNICATION CIRCUIT FOR A OPEN
1. Measure the voltage between ground and the (D122) Security K Line Communication circuit.
  Is the voltage between 9 - 12 volts?
  
  Yes
  - Replace the Keyless Ignition Node (KIN) in accordance with the Service Information. Refer to MODULE, KEYLESS IGNITION NODE (KIN), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (D122) SECURITY K LINE COMMUNICATION CIRCUIT FOR A OPEN
1. Disconnect the Radio Frequency Hub C1 harness connector.
2. Measure the resistance of the (D122) Security K Line Communication wire between the Keyless Ignition Node harness connector and the RF Hub C1 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the open in the (D122) Security K Line Communication wire.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D122) SECURITY K LINE COMMUNICATION CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (D122) Security K Line Communication circuit in the Keyless Ignition Node harness connector.
  Is there continuity between ground and the (D122) Security K Line Communication circuit in the Keyless Ignition Node harness connector?
  
  Yes
  - Repair the short to ground in the (D122) Security K Line Communication circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Radio Frequency Hub (RF Hub) Module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL AND INSTALLATION .
  - Perform the RADIO FREQUENCY HUB VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .