Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Using the scan tool, record and erase the DTCs.
2. Cycle the ignition to the Lock position.
3. Try to start the engine and allow to run for 30 seconds.
4. Cycle the ignition off and then back on.
5. Using the scan tool, read the active DTCs.
  Does the scan tool display; B1A7D-01-START BUTTON - GENERAL ELECTRICAL FAILURE?
  
  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 poor pin fit.
CHECK THE (D122) SECURITY K LINE COMMUNICATION CIRCUIT
1. Cycle the ignition off.
2. Disconnect the Keyless Ignition Node harness connector.
3. Measure the voltage between ground and the (D122) Security K Line Communication circuit.
  Is the voltage above 12.0 volts?
  
  Yes
  - Go To 3
  No
  - Repair the open in the (D122) Security K Line Communication circuit.
(G20) IGNITION SWITCH SENSE SHORTED TO GROUND
1. Measure the resistance between ground and the (G20) Ignition Switch Sense circuit.
  Is the resistance below 1500 Ohms?
  
  Yes
  - Repair the short to ground in the (G20) Ignition Switch Sense circuit.
  No
  - Go To 4
(G20) IGNITION SWITCH SENSE SHORTED TO BATTERY
1. Measure the voltage between ground and the (G20) Ignition Switch Sense circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (G20) Ignition Switch Sense circuit.
  No
  - Replace the Keyless Ignition Node (KIN) in accordance with the Service Information. Refer to MODULE, KEYLESS IGNITION NODE, REMOVAL .