DTC P0615: Starter Cut Relay STRLD Circuit Malfunction: General Description

A starter switch inhibit system prevents damaging the starter pinion gear by prohibiting starter activation while the engine is running. If the ignition switch is turned to START (III) or the engine start/stop button is pressed to select the START mode mistakenly while the engine is running, the powertrain control module (PCM) prevents the starter from working according to the engine speed information and the output (STRLY) signal of the starter cut relay is switched to LOW. In this system, two starter cut relays are connected in series (starter cut relay 1, starter cut relay 2) to prevent the starter from continuing to run due to a starter cut relay malfunction. Also a diagnosis line (STRLD) is used to monitor voltage in the middle of starter cut relay 1 and starter cut relay 2. The PCM detects an OPEN malfunction, an ON malfunction of starter cut relay 1, and an ON malfunction of starter cut relay 2. If the voltage on the diagnosis line (STRLD) input does not exceed upper and lower limits for a specified duration when the ignition switch is turned to START (III) or the engine start/stop button is pressed to select the START mode, and the output of the starter cut relay (STRLY) is HIGH (starter ON), the PCM detects an OPEN malfunction of the diagnosis line and stores a DTC.