803000

What the Code Means

803000 — “Functions seat heating not available”: the seat heating functions are unavailable. The code is stored in the fault memory and, according to the source, may persist with a possible loss of communication on the K-CAN9 / Body3 CAN bus. When communication on this bus is lost, the control module stops receiving commands and component status, which explains why seat heating is unavailable along with other body functions.

Symptoms

According to the source, symptoms may include:

• 803000 stored in the fault memory — Functions seat heating not available;
• Check Control “Drive Fault” warnings;
• possible failure of the windows, doors, and seats;
• restraint system warnings;
• no communication on the K-CAN9 / Body3 CAN bus.

Diagnosis and Repair

The source contains no diagnostic or repair procedure specific to this code — the recommendations it gives concern bracket damage and dealer contact and do not apply to this fault. The confirmed part: check for communication on the K-CAN9 / Body3 CAN bus and read the fault memory with a diagnostic tool. Additional steps, values, and tolerances are not confirmed by the source data.