Fulltext TSBs

Technical Service Bulletins

TSB
01-8-8
  • DRIVEABILITY – BI-FUEL OBD II DIAGNOSTIC MONITOR APPLICATION STRATEGIES – BI-FUEL VEHICLES ONLY
Publication Date: APRIL 23, 2001

FORD:
1998-2000 CONTOUR
1998 F-250 LD
1998-2001 E-250, E-350, F-150
1999-2001 SUPER DUTY F SERIES

ISSUE:

This article will provide an overview of Bi-fuel Liquid Propane Gas (LPG) and Compressed Natural Gas (CNG) operating characteristics for Bi-Fuel vehicles and can be used as an aid for diagnosis for the Bi-Fuel vehicles listed.

ACTION:

Refer to the following OBD II enabled/disabled chart for Bi-Fuel system application information.

SERVICE INFORMATION

  • US = Upstream
  • DS = Downstream
  • TP = Throttle Position
  • MAF = Mass Air Flow

BI-FUEL OBD II ENABLED/DISABLED APPLICATION CHART
OBD II Diagnostic MonitorBase Gasoline VehicleBi-Fuel Vehicle On GasolineBi-Fuel Vehicle On Alt. Fuel
Misfire MonitorEnabledEnabledDisabled
HEGO MonitorEnabled- – -Disabled
Lack of Switching (US & DS)EnabledEnabledDisabled
Amplitude Response Test (US)EnabledEnabled (relaxed criteria)*Disabled
Heater Current Monitor (US & DS)EnabledEnabledDisabled
Downstream Activity TestEnabledEnabled (relaxed criteria)*Disabled
EGR MonitorEnabledEnabled (relaxed criteria)*Disabled
Fuel System MonitorEnabledEnabled (relaxed criteria)*Disabled
Secondary Air MonitorEnabled- – -Disabled
Evaporative MonitorEnabledEnabledDisabled
Component MonitorEnabledEnabledPartially-Enabled
2-Volt Test (TP/MAF)EnabledEnabledDisabled
Fuel Pump TestEnabledEnabledDisabled
Idle Speed Control TestEnabledEnabledDisabled
Purge Flow ChecksEnabledEnabledDisabled
All OthersEnabledEnabledDisabled

* Relaxed criteria has been deleted beginning 2001 MY.

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Information Only

OASIS CODES:

490000, 690000, 698298


Copyright 2001 Ford Motor Company