Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSJEEP2009PATRIOT LIMITED, EDG, AUTOMATIC CVTREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICES(CABIN COMPARTMENT NODE (CCN) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGB1098-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPENDIAGNOSTIC TEST

2009 Jeep Patriot Limited, EDG, Automatic CVT

Diagnostic Test

2009 Jeep Patriot Limited, EDG, Automatic CVTSECTION Diagnostic Test

VERIFY DTC B1098-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Operate the Heated Seat Switch in both positions several times.
4. With the scan tool, read DTCs.
  Is DTC B1098-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN active?
  
  Yes
  - Go to step 2
  No
  - The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly. 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 BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK FOR OPEN SEAT HEATER ELEMENTS

Fig 1: Checking Seat Heater Element Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Right Seat Cushion Heater connector.
  NOTE: Check connectors. Clean and repair as necessary.
3. Measure the total resistance of the Cushion and Seat Back Heater Elements between (P188) Right Seat Heater B(+) Driver circuit and the (Z940) Ground circuit at the Right Seat Cushion Heater connector (component side).
  Is the total resistance 2.5 to 3.5 ohms + or - 0.5 ohms?
  
  Yes
  - Go to step 3
  No
  - Go to step 5
CHECK (Z961)/(Z905) GROUND CIRCUIT FOR AN OPEN

Fig 2: Checking Ground Circuit
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to 12-volts, check the (Z961)/(Z905) Ground circuit at the Right Seat Cushion Heater connector (harness side).
  NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 4
  No
  - Repair the (Z961)/(Z905) Ground circuit for an open.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK (P188) RIGHT SEAT HEATER B(+) DRIVER CIRCUIT FOR AN OPEN IN BODY HARNESS

Fig 3: Checking Right Seat Heater B(+) Driver Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the HSM connector.
  NOTE: Check connectors. Clean and repair as necessary.
2. Measure the resistance of the (P188) Right Seat Heater B(+) Driver circuit between the HSM connector and the Right Seat Cushion Heater connector (harness side).
  Is the resistance below 5.0 ohms?
  
  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 (P188) Right Seat Heater B(+) Driver circuit for an open.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK RIGHT SEAT BACK HEATER ELEMENT FOR AN OPEN

Fig 4: Checking Right Seat Heater Element Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the Right Seat Back Heater connector.
  NOTE: Check connectors. Clean and repair as necessary.
2. Measure the resistance of the Right Seat Back Heater Element between the (P188) Right Seat Heater B(+) Driver and the (Z940) Ground circuit at the Right Seat Back Heater connector (component side).
  Is the resistance above 6.0 Ohms?
  
  Yes
  - Replace the Seat Back Heater Element in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Seat Cushion Heater Element in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.