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EC-136 < SYSTEM DESCRIPTION > [VQ35DE] DIAGNOSIS SYSTEM (ECM) • ECM blinks MIL for about 10 seconds if all SRT codes are not set. MALFUNCTION WARNING MODE Description In this function ECM turns on or blinks MIL when it detects a malfunction in the emission control system com- ponents and/or the powertrain control components (which affect vehicle emissions) to inform the driver that a malfunction has been detected. Operation Procedure 1. Turn ignition switch ON. If it remains OFF, check MIL circuit. Refer to 3. Start engine and let it idle. • For two trip detection logic diagnoses, ECM turns on MIL when it detects the same malfunction twice in the two consecutive driving cycles. • For 1st trip detection logic diagnoses, ECM turns on MIL when it detects a malfunction in one driving cycle. • ECM blinks MIL when it detects a malfunction that may damage the three way catalyst (misfire). SELF-DIAGNOSTIC RESULTS MODE Description This function allows to indicate DTCs or 1st trip DTCs stored in ECM according to the number of times MIL is blinking. How to Set Self-diagnostic Results Mode NOTE: • It is better to count the time accurately with a clock. • It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a mal- function. • After ignition switch is turned off, ECM is always released from the “self-diagnostic results” mode. • Fully depress the accelerator pedal. • Fully release the accelerator pedal. 3. Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approx. 10 seconds until the MIL starts blinking. NOTE: Do not release the accelerator pedal for 10 seconds if MIL starts blinking during this period. This blinking is displaying SRT status and is continued for another 10 seconds. 4. Fully release the accelerator pedal. ECM has entered to “Self-diagnostic results” mode. NOTE: JMBIA1515GB |