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HOMESERVICE MANUALSJEEP2007GRAND CHEROKEE 2WD V6-3.7L VIN KREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONB CODE CHARTSB221A
2007 Jeep Grand Cherokee 2WD V6-3.7L VIN K

B221A

2007 Jeep Grand Cherokee 2WD V6-3.7L VIN KSECTION B221A





B221A-HEATED SEAT MODULE INTERNAL

For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

Ignition on.

- Set Condition:

This code is set immediately if the Heated Seat Module internal self test fails.





Diagnostic Test

1. VERIFY THAT DTC B221A-HEATED SEAT MODULE INTERNAL IS ACTIVE

With the scan tool, record and erase DTC's

Cycle the ignition switch off then back on.

With the scan tool, read DTC's.

Does the DTC B221A-HEATED SEAT MODULE INTERNAL reset?

Yes

- Replace the Heated Seat Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
RENDER: 1.0x

NO RELATED

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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.