Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read Heated Seat Module (HSM) DTCs and record on the repair order.
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.
  Does the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 6
CHECK THE (P188) RIGHT FRONT SEAT HEATER CONTROL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Right Front Seat Cushion Heater harness connector.
3. Disconnect the Right Front Seat Back Heater harness connector.
4. With the scan tool, actuate the Heated Seat ON to HIGH.
5. With a 12-volt test light connected to ground, check the (P188) Right Front Seat Heater Control circuit at the Right Front Seat Cushion and Right Front Seat Back Heater harness connectors (harness side).
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly at both connectors?
  
  Yes
  - Go To 3
  No
  - Repair the (P188) Right Front Seat Heater Control circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Z909) GROUND CIRCUIT FOR AN OPEN
1. With the scan tool, turn OFF the Heated Seat actuator.
2. Turn the ignition off.
3. With a 12-volt test light connected to 12 volts, check the (Z909) Ground circuit at the Right Seat Cushion and Right Front Seat Back Heater harness connectors (harness side).
  Does the test light illuminate brightly at both connectors?
  
  Yes
  - Go To 4
  No
  - Repair the (Z909) Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE RIGHT SEAT CUSHION HEATER ELEMENT FOR AN OPEN
1. Measure the resistance between the (P188) Right Front Seat Heater Control circuit and the (Z909) Ground circuit at the Right Front Seat Cushion Heater connector (component side).
  Is the resistance between 7.1 and 10.6 Ohms?
  
  Yes
  - Go To 5
  No
  - Replace the Right Front Seat Cushion Heater Element in accordance with the Service Information. Refer to PAD, HEATER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE RIGHT SEAT BACK HEATER ELEMENT FOR AN OPEN
1. Measure the resistance between the (P188) Right Front Seat Heater Control circuit and the (Z909) Ground circuit at the Right Front Seat Back Heater harness connector (component side).
  Is the resistance between 8.4 and 12.6 Ohms?
  
  Yes
  - 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 BODY VERIFICATION TEST .
  No
  - Replace the Right Front Seat Back Heater Element in accordance with the Service Information. Refer to COVER, SEAT BACK, FRONT, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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(s).
3. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. Check Service Bulletins for any possible causes that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test complete.