2. Check Signal For Unified Meter And A/C Amp. Side

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

Confirm A/C LAN signal between unified meter and A/C amp. harness connector M89 terminal 43 (L/B) and ground using an oscilloscope. See Fig 1 and Fig 2 .

Fig 1: Confirming A/C LAN Signal Using An Oscilloscope (1 Of 2)

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

Fig 2: Confirming A/C LAN Signal Using An Oscilloscope (2 Of 2)

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

OK or NG

OK, GO TO 3 .
NG, Replace unified meter and A/C amp.