1. Check Audio Unit Circuit

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect voice activated control module connector and Audio unit connector.
Check the following:
- Continuity between voice activated control module harness connector B69 terminal 27 (Y/R) and Audio unit harness connector M87 terminal 9 (OR).
  
  Fig 1: Checking Audio Unit Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Continuity should exist.
- Continuity between voice activated control module harness connector B69 terminal 27 (Y/R) and ground.
  Continuity should not exist.

OK or NG

OK: GO TO 2 .
NG: Repair harness or connector.