1. Check ASCD Pump

WARNING: This page is about a different car, the 2004 Infiniti M45 and 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect ASCD pump connector.
Measure resistance between ASCD pump terminals 1 and 2, 3, 4.

Fig 1: ASCD Pump Terminal Resistance Chart

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

Fig 2: Checking ASCD Pump Terminal Continuity

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

Refer to wiring diagram in SYSTEM WIRING DIAGRAMS .

OK or NG

OK: GO TO 2.
NG: Replace ASCD pump.