Engine - ON/OFF Throttle Sensitivity At Low Speeds: Overview

Classification:
EC01-009

Reference:
NTB01-018

Date:
March 21, 2001

2000-2001 MAXIMA WITH M/T; ON/OFF THROTTLE SENSITIVITY

APPLIED VEHICLES:
2000-2001 Maxima (A33) with Manual Transmission (M/T) Only

SERVICE INFORMATION

If a manual transmission 2000 or 2001 Maxima exhibits the following symptom:

^ On/off throttle sensitivity in first gear at low engine/vehicle speeds (1400-1800 rpm) during slight accelerator pedal movement.

The cause may be fuel cut/recovery transition when the throttle is closed and then opened slightly.

A new ECM program is available that will eliminate fuel cut/recovery at engine speeds below 1800 rpm. Use the Service Procedure provided in this bulletin to reprogram the vehicle's ECM and resolve the incident.

SERVICE PROCEDURE

Check For Stored DTC's:

Using CONSULT-II, check for stored DTC's (Diagnostic Trouble Codes) by selecting "ENGINE" and "SELF-DIAG RESULTS":

^ If no stored DTC's are found, proceed to Emissions Certification, below.

^ If stored DTC's. are found, use the appropriate Service Manual DTC Procedures to further diagnose and repair. Then proceed to Emissions Certification, below.

Emissions Certification

Determine the vehicle's Emissions Certification (California or Federal):

1. All 2001 Maxima vehicles have California emissions certification.





2. For 2000 Maxima vehicles, you need to determine it the vehicle is certified for California or Federal emissions. Check the Emissions Certification Label on the underside of the engine hood to verify if the certificate is for California emissions (see Figure 1). If there is no mention of California on the label, the vehicle is certified for Federal emissions.

3. Proceed to ECM Part Number Identification and Update, below.

ECM Part Number Identification and Update

1. Determine the vehicle's ECM Part Number. The ECM P/N is found by CONSULT ECM P/N Selection.





2. Compare the vehicle's ECM P/N to those shown under Current ECM P/N in Chart A shown.





3. Perform ECM reprogramming to update the ECM data to the new P/N. ASIST users refer to Attachment A in the print copy of this bulletin.

CLAIMS INFORMATION

NOTE:
This is the ONLY approved repair procedure for this incident. A claim to Nissan for the repair of this incident may be denied if the repair is not performed exactly as outlined in this bulletin.





Submit a Primary Failed Part (PP) line using the claims coding. Do NOT claim any section "EE" Op Codes for this operation shown.