Exhaust System - Sulfur Odor

Classification:
EC90-006

Reference:
NTB90-061

Date:
June 28, 1990

EXHAUST ODOR

APPLIED VEHICLE(S):
1989 Sentra (B12)

APPLIED VIN(S):
Prior to 5/25/89 (JAPAN - Built Vehicles)
Prior to 8/1/89 (U.S. - Built Vehicles)

SERVICE INFORMATION

Some of the applied models built prior to May 25, 1989 (JAPAN-Built Vehicles) or August 1, 1989 (U.S.-Built Vehicles) may exhibit an exhaust odor which smells of sulfur. To resolve such a customer complaint, perform the following service inspection procedures.

SERVICE PROCEDURE

1. Verify that the following engine control components are properly adjusted, using the Service Manual for specification and adjustment procedures:

^ Idle Speed
^ Throttle Valve Switch
^ AIV Operation
^ CO Inspection

2. If these components are within specification, perform self-diagnosis to verify proper Mixture Ratio Feedback Control (Mode II) and confirm the all-clear code (55) in Mode III. If self-diagnosis codes other than (55) are stored in Mode III, perform the appropriate diagnostic procedure to repair the malfunction.

3. If self-diagnosis indicates proper Mixture Ratio Feedback and engine control components are adjusted and operating properly, replace the AIV Case Assembly with the new part listed below:

New Part # : 14812-84A10 (Replaces Former Part # : 14812-84A00)