EIC Switch Assembly Circuit Failure
Table of contents
B1205 MERCURY Possible Causes
- Faulty Message Center Switch
- Message Center Switch harness is open or shorted
- Message Center Switch circuit poor electrical connection
- Faulty Instrument Cluster (IC)
How do I fix code B1205 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.
Cost of diagnosing the B1205 MERCURY code
The cost of diagnosing the B1205 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)
B1205 MERCURY Description
The message center functionality is controlled through the message center switches, which are hardwired to the Instrument Cluster (IC). The Instrument Cluster (IC) monitors the message center switch input by sending reference signals through the circuit. The message center switch return signal is routed back to the Instrument Cluster (IC) through the circuit. A continuous or on-demand Diagnostic Trouble Code (DTC) that sets if the Instrument Cluster (IC) detects a stuck RESET or SETUP switch, or a switch that has been pressed for longer than 2 minutes, on the circuit.