4 Check Intake Sensor Circuit Between Intake Sensor And Auto Amp.

1. Disconnect auto amp. harness connector.
2. Check circuit continuity between intake sensor harness connector terminal No. 1 and auto amp. harness connector terminal No. 1.
   Fig 1: Checking Intake Sensor Circuit Between Intake Sensor And Auto Amp

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

   Continuity should exist. 

If OK, check harness for short.

OK or NG 

OK:

1. Replace auto amp.
2. Go to FUNCTION CONFIRMATION PROCEDURE  and perform self-diagnosis STEP-2.

   Confirm that code No. 20 is displayed.

NG: Repair harness or connector.