Diagnostic Test

CHECK FOR ACTIVE DTC
1. With the scan tool, record and erase DTCs.
2. Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds.
3. With the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 2
  No
  - If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
INSPECT THE TIPM AND HEATED SEAT MODULE TERMINALS AND WIRE HARNESS FOR A CONDITION CAUSING HIGH CIRCUIT RESISTANCE

Fig 1: Checking TIPM & Heated Seat Module Terminals & Wire Harness
Courtesy of CHRYSLER LLC
1. Disconnect the TIPM C8 harness connector.
2. Disconnect the Heated Seat Module harness connector.
3. Inspect the connector terminal for signs of corrosion build up and damage.
4. Visually inspect the wiring harness for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.
  Were any of the above conditions found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 3
CHECK THE (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT FUNCTION

Fig 2: Checking Fused Ignition Switch Output (Run) Circuit
Courtesy of CHRYSLER LLC

Connect one end of a jumper wire to the (F937) Fused Ignition Switch Output (RUN) circuit at the Heated Seat Module harness connector, and connect the other end to a clean chassis ground.

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to battery.
1. Using a 12 volt test light connected to 12 volts, probe the (F937) Fused Ignition Switch Output (RUN) circuit in the TIPM C8 harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 4
  No
  - Repair the (F937) Fused Ignition Switch Output (RUN) circuit for high resistance.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK THE OUTPUT FROM THE TIPM ON THE (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT

Fig 3: Checking Output From TIPM On Fused Ignition Switch Output (Run) Circuit
Courtesy of CHRYSLER LLC
1. Reconnect the TIPM C8 harness connector.
2. Turn the ignition on.
3. Using a 12 volt test light connected to ground, probe the (F937) Fused Ignition Switch Output (RUN) circuit in the Heated Seat Module harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Heated Seat Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the TIPM in accordance with the Service Information
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .