Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
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, read Heated Seat Module (HSM) DTCs and record on the work order.
  NOTE:
  It is recommended to record any Environmental Data to help identify the conditions in which the DTC was set.
3. With the scan tool, erase HSM DTCs.
4. Turn the ignition off.
5. Start the Engine.
6. Turn the Heated Seat on and operate in all modes.
7. With the scan tool, read HSM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK THE (P187) LEFT FRONT SEAT HEATER CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Heated Seat Module (HSM) C2 harness connector.
3. Start the Engine.
4. Measure the voltage between ground and the (P187) Left Front Seat Heater Control circuit in the HSM C2 harness connector.
  Is the voltage 5.0 volts or above?
  
  Yes
  - Repair the (P187) Left Front Seat Heater Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (P187) LEFT FRONT SEAT HEATER CONTROL CIRCUIT FOR A SHORT TO VOLTAGE DURING SEAT ADJUSTMENT
1. Measure the voltage between ground and the (P187) Left Front Seat Heater Control circuit at the HSM C2 harness connector while adjusting the seat in all positions.
  Is the voltage 5.0 volts or above any time during the seat adjustment?
  
  Yes
  - Repair the (P187) Left Front Seat Heater Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Heated Seat Module (HSM) in accordance with the Service Information. Refer to MODULE, HEATED SEAT, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for shorted and open circuits. Attempt to reproduce the condition by adjusting the seat.
3. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. With the scan tool, check for any Environmental Data to help identify the conditions in which the DTC was set.
5. Check Service Bulletins for any possible causes that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.