EMW/IMS Warning Module Definition Location (89-11T-20)

Publication date: 1970-01-01
Reference number: 89-11T-20

EMW/IMS WARNING MODULE DEFINITION LOCATION

TECHNICAL SERVICE BULLETIN

Reference Number(s): 89-11T-20

APPLICATION

1985-89 Ford Bronco, 1985-87 Bronco II, 1985-89 Econoline, F-150, F-250, F-350, 1985-88 Ranger, 1986-87 Aerostar, 1988-90 F and B Series

SUBJECT

Emission Maintenance Warning Module.

REFERENCE

Ford Technical Service Bulletin No. 89-11T-20

CONDITION & CAUSE

A light that is located on the instrument panel is operated by the Emission Maintenance Warning "EMW" module. The light will display the word "EMISSIONS" for 1985-87 model year vehicles; the light will display the words "CHECK ENGINE" for 1988-89 model year vehicles. When the light comes on, it is indicative of the 60,000 mile emission maintenance performance. The EMW module must be reset to zero time after the maintenance has been performed. Another type of module is the "IMS" module and it is not part of the light circuit. It does not require maintenance. The IMS module directs the EEC IV processor to make a change at a predetermined time. A third type of module is the "COMBO" module which combines the functions of the IMS and the EMW modules.

REPAIR

Refer to the following module application tables for specific vehicle applications and locations of the different types of modules.

NOTE: THE "CHECK ENGINE" LIGHT IS CONTROLLED BY THE EEC IV PROCESSOR FOR APPLICATIONS NOT LISTED IN THE FOLLOWING MODULE APPLICATION TABLES. THESE VEHICLES WILL NOT USE THE "EMW" MODULE.

Fig 1: 1985-1986 MODULE APPLICATION TABLE

Fig 2: 1987 MODULE APPLICATION TABLE

Fig 3: 1988 MODULE APPLICATION TABLE

Fig 4: 1989 MODULE APPLICATION TABLE

Fig 5: 1990 MODULE APPLICATION TABLE