Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCs)
1. Turn the ignition on.
2. With the scan tool, read Engine Control Module (ECM) or Powertrain Control Module (PCM) DTCs.
  Are there any Charging System DTCs set in the ECM or PCM?
  
  Yes
  - Refer to Electrical/Charging - Diagnosis and Testing or DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing for Charging System diagnostic procedures.
  No
  - Go to step 2
VERIFY DTC B2182-HEATED SEAT MODULE POWER SUPPLY HIGH IS ACTIVE
1. With the scan tool, record and erase DTCs.
2. Turn the ignition off.
3. Start the engine and let it run for one minute.
4. With the scan tool, read DTCs.
  Is DTC B2182-HEATED SEAT MODULE POWER SUPPLY HIGH active?
  
  Yes
  - Go to step 3
  No
  - The conditions that caused this code to set are not present at this time. Verify seat harness is routedcorrectly to the HSM. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT VOLTAGE

Fig 1: Checking Fused Ignition Switch Output (Run) Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the HSM connector.
  NOTE: Check connectors. Clean and repair as necessary.
3. Start the engine and let idle.
4. Measure the voltage of the (F937) Fused Ignition Switch Output (Run) circuit between the HSM connector and ground and compare it to the voltage at the vehicle battery.
  Is the voltage measured at the HSM connector the same as the voltage measured at the battery?
  
  Yes
  - Replace the Heated Seat Module (HSM) in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Repair the (F937) Fused Ignition Switch Output (Run) circuit for the cause of the high voltage condition at the HSM.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .