CCES - Newly Designed Service Manual Information

Number 84-6 (Gasoline)-27 Date 3/84
Subject: NEWLY DESIGNED 1984 SERVICE MANUAL INFORMATION FOR COMPUTER CONTROLLED ENGINE SYSTEMS

MODELS AFFECTED: ALL 1984 COMPUTER CONTROLLED CARBURETED AND FUEL INJECTED VEHICLES
SECTION 6E "DRIVEABILITY AND EMISSIONS" INFORMATION HAS BEEN COMPLETELY REVISED FOR 1984. THE NEW FEATURES OUTLINED BELOW WILL ASSIST TECHNICIANS TO DIAGNOSE PROBLEMS MORE EASILY, SAVE TIME AND INCREASE CUSTOMER SATISFACTION..

COMPONENT AND WIRING HARNESS LOCATOR VIEWS:

^ COMPONENT AND WIRING HARNESS LOCATOR VIEWS

The "INTRODUCTION" section contains computer controlled engine system harness and component locator views.

ECM TERMINAL DATA AND VOLTAGE CHECKS:

^ ECM TERMINAL DATA AND VOLTAGE CHECKS Also included in the "INTRODUCTION" section are specific computer controlled engine system circuit schematics and terminal connection information. This information provides voltages with the ignition "ON" and engine not running. Also provided are voltages for Closed Loop Operation.

SUPPORTIVE INFORMATION ON PAGE FACING TREE CHART:

EASY-TO-FOLLOW TROUBLESHOOTING PATH:

^ SUPPORTIVE INFORMATION ON PAGE FACING TREE CHART

Section A contains the diagnostic code display procedure called the "Diagnostic Circuit Check" and the diagnostic codes tree charts. These charts provide an easy-to-follow troubleshooting path (see pg. 3).

The diagnostic charts have a facing page which includes a wiring diagram of the circuit involved, brief description of operation of that specific circuit, and explanation of the purpose of significant steps in the chart.

SYMPTOM DIAGNOSIS RELATED TO SPECIFIC FUEL CONTROL SYSTEM:

^ SYMPTOM DIAGNOSIS RELATED TO SPECIFIC FUEL CONTROL SYSTEM

Section B contains driveability symptoms diagnosis procedures which are specific to each engine fuel system.

OPERATION AND SERVICING INFORMATION:

^ OPERATION AND SERVICING INFORMATION

Section C describes the basic operation of individual systems which are part of the computer controlled engine performance package. This section includes on-car service and diagnostic charts for each system along with carburetor calibration, idle speed control adjustment, mixture control solenoid and injector R&R, etc.
We feel the expanded format of Section 6E will help you, the technician, more effectively diagnose and repair computer controlled fuel systems.