Left Seat Back Heater Circuit
Table of contents
B1935 GMC Possible Causes
- Faulty Left Seat Back Heater Element
- Left Seat Back Heater Element harness is open or shorted
- Left Seat Back Heater Element circuit poor electrical connection
- Faulty Memory Seat Module (MSM)
How do I fix code B1935 GMC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- B1935 04: Left Seat Back Heater Circuit Open
- B1935 0A: Left Seat Back Heater Circuit Rate of Change Below Threshold
- B1935 0B: Left Seat Back Heater Circuit Current Above Threshold
- B1935 0C: Left Seat Back Heater Circuit Current Below Threshold
- B1935 0D: Left Seat Back Heater Circuit Resistance Above Threshold
- B1935 0E: Left Seat Back Heater Circuit Resistance Below Threshold
- B1935 1F: Left Seat Back Heater Circuit Intermittent
Cost of diagnosing the B1935 GMC code
The cost of diagnosing the B1935 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B1935 GMC Description
When the heated seat function is active, the Memory Seat Module (MSM) supplies battery voltage through the element supply voltage circuit to the seat heater elements. The module controls the seat temperature by providing a PWM ground through the heated seat element control circuit to the seat heater elements. The module then monitors the current flow through the heating element and the temperature sensor rate of change to verify correct operation. The OBDII code sets when the module detects that the set point temperature is not to factory specifications.