1. Check UART Line Input/Output Signal 1

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch OFF.
Check signal between driver seat control unit connector and ground, with oscilloscope.

Fig 1: Signal Chart

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Signal

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> GO TO 2.
NG >> Check the following.
- When voltage wave form does not appear with a constant voltage (approx. 5V), replace driver seat control unit.
- When voltage wave form does not appear with a constant voltage (approx. 0V), replace automatic driver seat control unit.