Code Definition

B10E7 (15) — Ignition On Relay Control Circuit Malfunction

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B10E7

B10E7 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B10E7 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B10E7 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Body Control Module (BCM) on Ford vehicles controls the coil of the Ignition On relay, which in turn supplies switched ignition voltage to the modules and accessories that need power whenever the ignition is in the ON or START position. The BCM typically energises the relay through a low side driver and monitors the voltage on the control line to confirm the relay has responded correctly. DTC B10E7 with failure type 15 is logged when the BCM sees that the relay control circuit is either open (no activation possible) or shorted to battery voltage during the monitored period. When this code ...

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