DTC Confirmation Test
WARNING: This page is about a different car, the 2002 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
Malfunction is detected when ECM receives incorrect signal from Transmission Control Module (TCM). Possible causes are:
- Open or short in communication line between ECM and TCM.
- Dead battery.
- Defective TCM.
To set DTC, turn ignition on. Using scan tool, select DATA MONITOR. Start engine and wait at least 40 seconds. If first trip DTC is detected, perform DIAGNOSTIC PROCEDURE .