B1370 FORD, LINCOLN, MERCURY: DOOR HANDLE GROUND SUPPLY SIGNAL STUCK
POST UPDATED IN February, 2023
B1370 Code failures by brands
Description of DTC code B1370
The Remote Function Actuator Module (RFA) gets the radio frequency signals from the Remote Function Receiver Module (FRF) and IA (Intelligent Access) key transmitters. The RFA is provided with various input signals from different modules and other components. As a result, the Remote Function Actuator Module generates an output signal for the control of various components, including the door locks and the back door.
When the B1370 OBDII diagnostic code is stored on Ford, Lincoln, and Mercury vehicles, it is because the Remote Function Actuator detected a short to ground or a voltage from the outside door handle ground supply circuit.
Symptoms of fault code B1370
- Check Engine light ON.
Causes of OBD2 B1370
The B1370 OBD2 fault code B1370 is set for the following reasons:
- The door handle circuit wires may be in poor condition.
- The electrical connections in the door handle circuit may be faulty, causing the short.
- The door handle may be in poor condition.
- The Remote Function Actuator may be damaged.
Possible solutions of the DTC code B1370
To troubleshoot the DTC B1370 OBDII code, try this:
- First, consult the Technical Service Bulletins.
- Check the door handle circuit for any imperfection on its wiring or connectors. Detect shortages caused by corrosion or wear. If you detect such conditions, make the appropriate repairs.
- Measure the door handle circuit voltages to locate the short to ground indicated by the code. Pay attention to the connections to check for damage. Fix if necessary.
- If you do not detect damage in the ground circuit, check the door handle for deficiencies. Take into account the advice given by the manufacturer. If any damage is detected, make the appropriate adjustments.
