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EC-58 < SYSTEM DESCRIPTION > [VQ35DE] DIAGNOSIS SYSTEM (ECM) PERMANENT DTC SET TIMING The setting timing of permanent DTC is stored in ECM with the lighting of MIL when a DTC is confirmed. DIAGNOSIS DESCRIPTION : Malfunction Indicator Lamp (MIL) INFOID:0000000009178061 • When detecting a DTC that affects exhaust gas, the exhaust emis- sion-related control module transmits a malfunction indicator lamp signal to ECM via CAN communication line. ECM prioritizes (MIL: ON/blink) 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 combination meter via CAN communication line. The combination meter turns ON or blinks the MIL, according to the signal transmitted from ECM, and alerts the driver of malfunc- tion detection. • Control modules that a DTC of MIL ON/Blink is stored (Control module varies among DTCs.): - ECM - TCM 1. The MIL illuminates when ignition switch is turned ON (engine is not running). NOTE: Check the MIL circuit if MIL does not illuminate. Refer to EC-443, "Component Function Check" . 2. When the engine is started, the MIL should go off. NOTE: If MIL remains ON or continues blinking, a DTC(s) that affects exhaust gas is detected. In this case, Self- diagnosis is required for performing inspection and repair. On Board Diagnosis Function INFOID:0000000009178062 ON BOARD DIAGNOSIS ITEM The on board diagnostic system has the following functions. BULB CHECK MODE Description This function allows damage inspection in the MIL bulb (blown, open circuit, etc.). Operation Procedure 1. Turn ignition switch ON. If it remains OFF, check MIL circuit. Refer to SRT STATUS MODE Description JSBIA1315ZZ Diagnostic test mode Function Bulb check MIL can be checked. SRT status ECM can read if SRT codes are set. Malfunction warning If ECM detects a malfunction, it illuminates or blinks MIL to inform the driver that a malfunction has Self-diagnostic results DTCs or 1st trip DTCs stored in ECM can be read. Accelerator pedal released po- ECM can learn the accelerator pedal released position. Refer to Throttle valve closed position ECM can learn the throttle valve closed position. Refer to . Idle air volume learning ECM can learn the idle air volume. Refer to Mixture ratio self-learning value Mixture ratio self-learning value can be erased. Refer to |