Engine Fuel & Emission Control System

ENGINE FUEL & EMISSION CONTROL SYSTEM

PREPARATION — SPECIAL SERVICE TOOLS

PRECAUTIONS

E.C.C.S. Component Parts Location

E.C.C.S. Component Parts Location (Cont'd)

ENGINE AND EMISSION CONTROL OVERALL SYSTEM — System Diagram

ENGINE AND EMISSION CONTROL OVERALL SYSTEM — System Chart

ENGINE AND EMISSION CONTROL OVERALL SYSTEM — Circuit Diagram

ENGINE AND EMISSION CONTROL PARTS DESCRIPTION

ENGINE AND EMISSION CONTROL PARTS DESCRIPTION

ENGINE AND EMISSION CONTROL PARTS DESCRIPTION

ENGINE AND EMISSION CONTROL PARTS DESCRIPTION

ENGINE AND EMISSION CONTROL PARTS DESCRIPTION

Fuel Injection Control INPUT/OUTPUT SIGNAL LINE

Fuel Injection Control (Cont'd)

Engine and Emission Control System Description — Fuel Injection Control (Cont'd) / Ignition Timing Control

Ignition Timing Control (Cont'd)

Idle Speed Control — INPUT/OUTPUT SIGNAL LINE

Fuel Pump Control / Air Regulator Control / Fuel Pressure Regulator Control

Fuel Pressure Regulator Control (Cont'd) / Acceleration Cut Control

Exhaust Gas Sensor Heater Control / Fail-safe System / Direct Ignition System

Direct Ignition System (Cont'd) — Checking Ignition Timing and Idle Speed

Direct Ignition System (Cont'd)

Direct Ignition System (Cont'd)

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION — For catalyzer model

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION (Cont'd)

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION (Cont'd)

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION — Non-catalyzer model (with CO-meter)

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION

IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTION — Non-catalyzer model (without CO-meter)

TROUBLE DIAGNOSES — Contents

TROUBLE DIAGNOSES — Contents (Cont'd)

How to Perform Trouble Diagnoses for Quick and Accurate Repair

How to Perform Trouble Diagnoses for Quick and Accurate Repair (Cont'd) — WORK FLOW

How to Perform Trouble Diagnoses for Quick and Accurate Repair (Cont'd) — DIAGNOSTIC WORKSHEET

How to Perform Trouble Diagnoses for Quick and Accurate Repair (Cont'd) — INTERMITTENT PROBLEM SIMULATION

TROUBLE DIAGNOSES — Diagnostic Table

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 1: Impossible to start – no combustion

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 2: Impossible to start — partial combustion

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 3: Impossible to start – partial combustion (not affected by throttle position)

Diagnostic Table (Cont'd) — Impossible to start - partial combustion (throttle position changes combustion quality)

Diagnostic Table (Cont'd) — Symptom & Condition 5: Hard to start — before warm-up

Diagnostic Table (Cont'd) — Hard to start — after warm-up

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd): Hard to start — every time / SERVICE PROCEDURE

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd)

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Abnormal idling - no fast idle

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) / Service Procedure

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) Symptom & Condition 11: Abnormal idling – high idle (after warm-up)

Diagnostic Table (Cont'd) — Symptom 12: Unstable Idling Before Warm-up

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 13: Unstable idling — after warm-up

Trouble Diagnoses — Diagnostic Table (Cont'd) — Symptom & Condition 14: Poor Driveability — Stumble (While Accelerating)

TROUBLE DIAGNOSES — Diagnostic Table (Cont'd)