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ENGINE CONTROL SYSTEM CONTENTS CD20T Special Service Tools ................................................ 3 Precautions for On Board Diagnostic (OBD) ENGINE AND EMISSION CONTROL OVERALL ......................................................................... 9 Engine Control Module Component Parts ENGINE AND EMISSION BASIC CONTROL ............................................. 15 Glow Control System............................................... 15 ...................... 21 Description ............................................................... 21 ................................................... 22 Removal and Installation ......................................... 22 ELECTRONIC FUEL INJECTION PUMP .................... 24 Removal................................................................... 24 Disassembly and Assembly..................................... 26 ON BOARD DIAGNOSTIC SYSTEM ............................................................. 27 CONSULT-II ............................................................. 27 TROUBLE DIAGNOSIS - INTRODUCTION Introduction .............................................................. 33 .................... 35 Work Flow................................................................ 35 TROUBLE DIAGNOSIS - BASIC INSPECTION ......... 37 Basic Inspection....................................................... 37 TROUBLE DIAGNOSIS - GENERAL ............................................................. 39 Diagnostic Trouble Chart ......................................... 39 TROUBLE DIAGNOSIS FOR POWER SUPPLY ........ 59 Main Power Supply and Ground Circuit.................. 59 ............................................ 62 Mass Air Flow Sensor (MAFS) ................................ 62 ............................................ 66 Engine Coolant Temperature (ECT) Sensor ........... 66 ............................................ 70 Vehicle Speed Sensor (VSS) .................................. 70 ............................................ 74 Control Sleeve Position Sensor (CSPS) ................. 74 ............................................ 78 Electric Governor ..................................................... 78 ............................................ 82 EC |