MIL ON - Multiple EVAP System DTCs

Classification:
EC98-003A

Reference:
NTB98-029A

Date:
June 15, 1998

MIL"ON" WITH EVAP EMISSION CONTROL SYSTEM DTC(S) STORED DUE TO INSECT NEST(S) IN EVAP SYSTEM

This amended version of NTB98-029 updates information in the Applied Vehicles, Service Information and Parts Information sections. Please discard all paper copies of NTB98-029.

APPLIED VEHICLES:
All 1996-97 Truck (D21)
All 1998 Frontier (D22)
All 1997-98 Pathfinder (R50)
All 1996-98 240SX (S14)
1996-98 Maxima (A32) - (vehicles built before VIN # 523794)

SERVICE INFORMATION

If any of the applied vehicles exhibit a MIL "ON" with one or more of the below DTCs stored, the cause may be insect nest(s) in the evaporative (EVAP) emission control system.

^ DTC P0443 - 1996-97 Truck, 1997 Pathfinder, 1996-97 240SX, 1996-97 Maxima

^ DTC P0446 - 1996-97 Truck, 1997 Pathfinder, 1996-97 240SX, 1996-97 Maxima

^ DTC P0450 - 1996-97 Truck, 1998 Frontier, 1997-98 Pathfinder, 1996-98 240SX, 1996-97 Maxima

^ DTC P1445 - 1996-97 Truck, 1997 Pathfinder, 1996-97 240SX, 1996-97 Maxima

^ DTC P1444 - 1998 Frontier, 1998 Pathfinder, 1998 240SX, 1998 Maxima

^ DTC P1446 - 1998 Frontier, 1998 Pathfinder, 1998 240SX, 1998 Maxima

^ DTC P1493 - 1998 240SX, 1998 Maxima





To help prevent insects from entering the EVAP emission control system, a new inlet elbow connector is now available. The new elbow has an integral mesh (screen) that covers the opening of the elbow (see Figure 1).

SERVICE PROCEDURE





1. Inspect all EVAP system hoses and components between the inlet elbow connector and the EVAP canister for insect nest(s) (see Figure 2).

A) If an insect nest(s) is found inside any of the EVAP components, remove the nest(s) and replace the existing inlet elbow connector with a new elbow connector (see Figure 2) and proceed with step 2.

NOTE:
When working on 1996-98 240SX models, the new elbow connector replaces the existing inlet breather valve (see Figure 2).

B) If an insect nest is not found, proceed with step 2.

2. Use the appropriate section of the service manual to diagnose and repair the stored DTC(s).





PARTS INFORMATION

CLAIMS INFORMATION

When applicable, standard claims coding applies.