AutoCodes - OBDII Code List - B135C MERCURY

B135C MERCURY - Heater Element Circuit Short

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

B135C MERCURY Possible Causes

  • Faulty Steering Wheel
  • Steering Wheel harness is open or shorted
  • Steering Wheel circuit poor electrical connection
  • Faulty Clockspring
  • Faulty Heated Steering Wheel Module (HSWM)

How do I fix code B135C MERCURY?

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.
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Tech Notes

B135C:11 Heater Element Circuit Short to Ground
B135C:15 Heater Element Circuit Short to Battery or Open

Cost of diagnosing the B135C MERCURY code

Labor: 1.0

The cost of diagnosing the B135C MERCURY 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)

B135C MERCURY Description

When steering wheel heat is requested and the engine is running, the Heated Steering Wheel Module (HSWM) applies voltage and ground to the steering wheel heating element (integral to the steering wheel). The steering wheel heating element draws between 1 and 10 amps of current depending on steering wheel temperature. The HSWM uses a sensor in the steering wheel (integral to the steering wheel) to maintain the heated steering wheel temperature. The HSWM is designed to remain on, heating the steering wheel and maintaining temperature until switched OFF using the FDIM or the ignition is turned OFF. The OBDII code sets when the heated steering wheel is commanded on and the HSWM senses current greater than 10 amps or less than 1 amp from the steering wheel heating element output circuit, indicating a short to ground or voltage, or when the steering wheel heating element output Field Effect Transistor (FET) in the HSWM has a thermal failure. When this fault sets, the steering wheel heating element output is disabled until the ignition is cycled.
OBDII Code B135c Mercury - Heater Element Circuit Short -

More Information

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