P1297 HONDA - ELECTRIC LOAD DETECTOR (ELD) CIRCUIT LOW VOLTAGE
POST UPDATED IN June, 2023
P1297 HONDA - ELECTRIC LOAD DETECTOR (ELD) CIRCUIT LOW VOLTAGE
The Electric Load Detector (ELD) is a vehicle fuse box and relay current transformer. This device detects the amount of voltage drawn from the battery and the charging system. The PCM (Powertrain Control Module) regulates the current applied to the coil according to the signal provided by the ELD. Therefore, the alternator’s voltage output varies to meet the various charging requirements.
Generally, when air conditioning or lighting system accessories are used, the alternator has an output of 14.4V. While such accessories are not in use, the output of the alternator should be reduced to maximize its lifetime.
If the PCM finds a voltage signal in the Electric Load Detector circuit that is excessively below the voltage expected to be produced by the alternator, the P1297 OBDII diagnostic code will be set.
Reasons for setting the P1297 OBD2 fault code:
Steps to solve the DTC P1297 OBDII code: