Emissions System - California Version

86yugo01

NUMBER: 0-03

DATE: 12/19/86
SUBJECT: CALIFORNIA VERSION VEHICLES

VEHICLES: 1987 Model Year

DISTRIBUTION: All Dealer Service Departments
GENERAL
INFORMATION: California Yugo vehicles differ only slightly from the "federalized" or 49 State versions. There are no external visual differences in the two.

The California cars are equipped with an underdash Electronic Purge Control Unit and have some minor differences in the electrical wiring as well as in the calibration of the air injection and EGR system.

OPERATION: The Electronic Purge Control Unit (EPCU) leaves the ignition on momentarily (4 to 5 seconds) when the key is turned off. This feature literally allows the engine to run out of gas on shutdown, further reducing HC emission during heat soak. At the end of this short cycle, the indicator lights in the instrument cluster will go out. The cooling fan will come on for 4 to 5 minutes at ambient temperatures above 40 or 50~F. Owners of California version vehicles can be assured that these are normal functions of the EPCU system.

REFERENCE: Electrical wiring differences are detailed in the "YUGO GV WIRING DIAGRAMS" manuals sent to your Service Department on December 5, 1986. The other items of different calibration are contained in your Parts Catalogue.