ECH-46
< SYSTEM DESCRIPTION >
[HRA2DDT]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Diagnosis Description
INFOID:0000000010379035
This system is an on board diagnostic system that records exhaust emission-related diagnostic information
and detects a sensors/actuator-related malfunction. A malfunction is indicated by the malfunction indicator
(MIL) and stored in ECU memory as a DTC. The diagnostic information can be obtained with the diagnostic
tool (GST: Generic Scan Tool).
NOTE:
OBD is not applied for regions where it is not mandated.
MALFUNCTION INDICATOR LAMP
When detecting a DTC that affects exhaust gas, the exhaust emis-
sion-related control module transmits a malfunction indicator signal
to ECM via CAN communication line.
ECM prioritizes the signal received from the exhaust emission-
related control module and the ECM-stored DTC that affects exhaust
gas and transmits a malfunction indicator lamp signal to the combi-
nation meter via CAN communication line.
The combination meter turns ON the MIL, according to the signal
transmitted from ECM, and alerts the driver of malfunction detection.
JPNIA1882ZZ