Diagnostic Test

WARNING: This page is about a different car, the 2016 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
Diagnose and repair any Starter Relay circuit faults that are present in the PCM or BCM before continuing with this test procedure.
1. Start the engine and allow it to idle.
2. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (T752) STARTER RELAY 1 CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Remove the Starter Relay from the Power Distribution Center (PDC).
4. Check for continuity between ground and the (T752) Starter Relay 1 Control circuit at the Starter Relay connector in the PDC (terminal 86).
  Is there continuity between ground and the (T752) Starter Relay 1 Control circuit?
  
  Yes
  - Repair the (T752) Starter Relay 1 Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the Starter Relay 1.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .