Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE:
Make sure the battery is fully charged and the charging system is operating properly before proceeding.
1. Turn the ignition on.
2. With the scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Turn the ignition off.
4. Start the engine and let it run.
5. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2.
  No
  - The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly to the HSM. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals. Attempt to reproduce condition by adjusting the seat.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (F931) FUSED IGNITION RUN CONTROL OUTPUT CIRCUIT FOR AN OPEN OR SHORT

Fig 1: Checking Fused Ignition Run Control Output Circuit For Open Or Short
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the HSM C4 harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the (F931) Fused Ignition Run Control Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Heated Seat Module (HSM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open or short in the (F931) Fused Ignition Run Control Output circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .