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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Automatic Transmission Diagnosis - Re4R01A) >> Description & Operation >> Electronic Control System >> OBD-II Function

OBD-II Function

WARNING: This page is about a different car, the 2002 Infiniti QX4, 2001 Nissan Pathfinder, and 2001 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.

The ECM provides emission-related OBD-II functions for the transmission. One function is to receive a signal from the TCM used with OBD-related parts of the transmission system. The signal is sent to the ECM when a malfunction occurs in the corresponding OBD-related part. The other function is to indicate a diagnostic result by means of the MIL on the instrument panel. Sensors, switches and solenoid valves are used as sensing elements. The MIL automatically illuminates in one or two trip detection logic when a malfunction is sensed in relation to transmission.

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