Malfunction Indicator Lamp (MIL)

DIAGNOSIS SYSTEM (ECM)

DIAGNOSIS DESCRIPTION : Malfunction Indicator Lamp (MIL)


SYSTEM DIAGRAM







SYSTEM DESCRIPTION






- If the emission-related control module detects emission-related
DTC, illuminating or blinking of the MIL notifies the driver that a malfunction is detected.
- When the Li-ion battery controller, traction motor inverter or TCM*
detects emission-related DTC, a malfunctioning indicator lamp signal to is sent HPCM via CAN communication.
If TCM detects emission-related DTC, it sends a malfunctioning indicator lamp signal to ECM via HPCM (gateway) in CAN communication.
*: If DTC related to hybrid is detected, a signal is sent.
- HPCM sends a malfunctioning indicator lamp signal from Li-ion battery controller, traction motor inverter and TCM and a malfunctioning indicator lamp signal with emission-related DTC stored in HPCM to ECM.
- ECM compares malfunctioning indicator lamp signal from TCM and HPCM with emission-related DTC
stored in ECM, and determines whether to illuminate or blink the MIL. ECM sends a malfunctioning indicator lamp signal to HPCM in CAN communication.
- HPCM sends a malfunctioning indicator lamp signal (illuminating or blinking) from ECM to the combination meter via CAN communication.
- The MIL in the combination meter illuminates or blinks based on the malfunctioning indicator lamp signal from HPCM.
- Control module that memorizes DTC for illuminating or blinking of the MIL
(The control module memorized for each DTC varies.)
- ECM
- TCM
- HPCM
- Li-ion battery controller
- Traction motor inverter
1.The MIL illuminates when ignition switch is turned ON.
NOTE:
When the MIL does not illuminate, check the circuit of the MIL. Malfunction Indicator Lamp.
2.The MIL turns off when the ignition switch is set to READY.
NOTE:
When the MIL continues to illuminate or blink, emission-related DTC is detected. Perform total self-diagnosis and inspect or repair the unit.