Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM:

A/C system does not come on.

CHECK POWER SUPPLY CIRCUIT FOR A/C CONTROL UNIT

Fig 1: Power Supply Circuit For A/C Control Unit Voltage Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Power Supply Circuit For A/C Control Unit
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 2.
2. NG: Check 10A fuse (No. 12) at fuse block (J/B).
CHECK BODY GROUND CIRCUIT FOR A/C CONTROL UNIT

Fig 3: Body Ground Circuit For A/C Control Unit Continuity Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Checking Body Ground Circuit For A/C Control Unit
Courtesy of NISSAN MOTOR CO., U.S.A.

If OK, check harness for short.

OK or NG
1. OK: INSPECTION END
2. NG: If NG, repair harness or connector.