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Isuzu Manuals
Engine
20LE
Workshop manual
Isuzu 20LE Workshop Manual
Isuzu gasoline engine c22ne, 22le, 20le
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Section 6 Engine Diagnosis
Engine Diagnosis
Table of Contents
Engine Diagnosis
Hard Starting
Engine Compression Test Procedure
Rough Engine Idling or Engine Stalling
Rough Engine Running
Hesitation
Engine Lacks Power
Engine Noisy
Abnormal Noise Due to Hydraulic Lash Adjustor
Troubleshooting Procedure
Abnormal Combustion
Engine Oil Consumption Excessive
Fuel Consumption Excessive
Oil Problems
Engine Oil Pressure Check
Malfunction Indicator Lamp
Section 6A Engine Mechanical
Engine Mechanical
General Description
Engine Pictorial
Rear View
Top View
Main Data and Specification
Crankcase Ventilation System
Engine Assembly & Loose Parts
Operations on Engine Aggregates
Engine Damping Blocks(Engine Without Transmission)
Toothed Belt Tension, Adjust
Toothed Belt, Replace
Operations on Installed Engine
Gasket, Exhaust Manifold, Cylinder Head
Gasket, Intake Manifold, Clinder Head
Seal Ring, Camshaft Housing, Timing Side
Seal Ring, Thermostat Housing, Cylinder Head
Seal Ring - Front Camshaft Housing, Replace
Toother Belt Rear Cover
Toother Belt Tension Roller
Component Parts
Cylinder Head
Hydraulic Valve Lifter
Operations on Cylinder Head and Camshaft Housing
Camshaft
Camshaft Housing Removal and Installation
Cylinder Head
Hydraulic Valve Lifers, Replace
Camshaft Housing, Replace
Camshaft Housing, Check for Plance Surface
Cylinder Head, Removal and Installation
Cylinder Head, Disassemble and Assemble
Valve, Grind
Valve Seating, Mill
Cylinder Head, Overhaul
Flywheel
Starter Ring Gear(Manual Transmission)
Seal Ring, Crankshaft
Seal Ring, Crankshaft Rear
Gasket, Oil Pan
Operations on Crank Drive
Con-Rod Bearing
Piston with Con-Rod
Con-Rod
Operations on Removed Engine
Crankshaft
Bearing Free Play Measurement
Plastigage Method
Micrometer and Gauge Method
Bypass Valve
Oil Filter
Oil Pump
Oil Pump Safety Valve
Oil Pump(Overhaul)
Operations on Oil Circulation
Cylinder Head Safety Valve
Operations on Cooling Sysytem
Cooling System, Check for Leakes
Cooling System, Fill up and Bleed
Refill Coolant
Ignition Timing, Check
Engine External Parts
Engine Mechanical (C22Ne, 22Le, 20Le) 6A-3
Radiator
Thermostat
Water Pump
Coating Sealing Surfaces with Silicone Grease
Alternator
Starter
V-Belt Tension of Alternator
Fuel Injection System
Map Sensor
Pressure Regulator
ECM (Engine Control Module)
Ect
Idle Air Control(IAC) Valve
Ignition Coil
Crank Position Sensor
Fuel Injector
Knock Sensor
Oxygen Sensor
Throttle Valve Position Sensor
Air Cleaner Filter
Spark Plug Thread
Technical Data
Engine Oil Viscosity
Radiator Cap
Recommended Torque Values
Special Service Tools
Section 6B Engine Cooling
Special Service Tool
Engine Cooling
General Description
Service Precaution
Diagnosis
Draining and Refilling Cooling System
Water Pump
Inspection
Removal
Water Pump and Associated Parts
Installation
Thermostat
Inspection
Installation
Removal
Fan Clutch with Cooling Fan
Inspection and Repair
Radiator
Radiator and Associated Parts
Removal
Inspection
Installation
Main Data and Specifications
Special Service Tool
Section 6C Engine Fuel
Engine Fuel
General Description
Service Precaution
Fuel Metering
Fuel Filter
Fuel Filter and Associated Parts
Removal
Inspection
Installation
In-Tank Fuel Filter
Fuel Pump
Fuel Pump and Associated Parts
Removal
Installation
Fuel Pump Relay
General Description
Fuel Tank
Fuel Tank and Associated Parts
Removal
Installation
Fuel Gage Unit
Removal and Installation
Fuel Filler Cap
General Description
Inspection
Fuel Filter
Removal
Installation
Fuel Tank
Removal
Installation
Main Data and Specifications
Section 6D1 Engine Electrical
Engine Electrical
Battery
General Description
Service Precaution
Diagnosis
Battery Charging
Jump Starting
Installation
Main Data and Specifications
Removal
Section 6D2 Ignition System
Diagnosis
General Description
Ignition Coil
Removal
Installation
Service Precaution
Spark Plug
Removal
Inspection and Repair
Installation
Crankshaft Angle Sensor
Removal
Main Data and Specifications
Section 6D3 Starting and Charging System
Starting and Charging System
Diagnosis
General Description
Service Precaution
Starting System
Starter
Removal
Installation
Disassembled View
Inspection and Repair
Characteristic Test
Charging System
General Description
General On-Vehicle Inspection
Generator
Removal
Inspection
Installation
Diagnosis
Disassembly
Clean
Inspection
Reassembly
Inspection
Technical Data
Section 6E Driveability and Emissions
Driveability and Emissions
Emission Control System Schematics
Engine Coolant Temperature Sensor
Spark Plugs
Specification
Tightening Specifications
Diagrams and Schematics
ECM Pinout Table, 32-Pin Blue Connector-Row "J1
ECM Pinout Table, 32-Pin Blue Connector-Row "J1
Ecm Pinouts
ECM Pinout Table, 32-Pin Red Connector-Row "J2
ECM Pinout Table, 32-Pin Red Connector-Row "J2
Component Locator
Engine Component Locator Table
Undercarriage Component Locator Table
Instrument Panel (I/P) Fuse Block
Underhood (U/H) Fuse and Relay Panel
Diagnosis
Strategy-Based Diagnostics
Dtc Stored
No Dtc
No Matching Symptom
Intermittents
No Trouble Found
Verifying Vehicle Repair
Generalservice Information
Maintenance Schedule
Obd Serviceability Issues
Fuel Quality
Non-OEM Parts
Poor Vehicle Maintenance
Related System Faults
On-Board Diagnostic (Obd)
Visual/Physical Engine Compartment Inspection
Basic Knowledge of Tools Required
On-Board Diagnostic Tests
Input Components
Output Components
Passive and Active Diagnosis Tests
Intrusive Diagnosis Tests
Warm-Up Cycle
Serial Data Communications
Common Obd Terms
Diagnostic for Closed Loop System
Enable Criteria
Trip
The Diagnositic Executive
Diagnostic Information
Malfunction Indicator Lamp (MIL)
Extinguish the MIL
Data Link Connector (DLC)
Reading Flash Diagnostic Trouble Codes
Reading Diagnostic Trouble Codes Using a TECH 2
Clearing Diagnostic Trouble Codes
On-Board Diagnosis (Self-Diagnosis)
Tech 2 Scan Tool
Getting Started
Operating Procedure
Menu
Reading Diagnostic Trouble Codes Using a Scan Tool
Clearing Diagnostic Trouble Codes
Verifying Vehicle Repair
Clear DTC Information
DTC Information Mode
Dtc Modes
Fuel Control Heated Oxygen Sensors (if Applicable)
Ho2S Heater
Primary System-Based Diagnostics
On-Board Diagnostic (Obd) System Check
Circuit Description
Diagnostic Aids
Test Description
On-Board Diagnostic (OBD) System Check
A/C Clutch Control Circuit Diagnosis
Circuit Description
A/C Clutch Diagnosis
Diagnostic Aids
Electric Ignition System Diagnosis
Evap Canister Purge Solenoid (if Applicable)
Fuel System Pressure Test
Idle Air Control (Iac) Valve
Visual Check of the Evaporative Emission Canister (if Applicable)
Fuel Injector Coil Test Procedure and Fuel Injector Balance Test Procedure
Test Description
Injector Balance Test Procedure (Step7-11)
Injector Balance Test Procedure (Step7-11)
Fuel Metering System Check
Engine Control Module(Ecm) Diagnosis
MULTIPLE ECM INFORMATION SENSOR Dtcs SET
Circuit Description
Diagnostic Aids
Poor Connection at ECM
Damaged Harness
Legend
Results of Incorrect Operation
Diagnosis
Legend
Visual Check of Canister
Evaporative Emission Canister Purge Control Solenoid Valve Check (if Applicable)
Circuit Description
Diagnostic Aids
Test Description
General Description
Legend
ECM Diagnostic Trouble Codes
Symptom Diagnosis
Preliminary Checks
Visual/Physical Check
Intermittent
Hard Start Symptom
Surges And/Or Chuggles Symptom
Lack of Power, Sluggish or Spongy Symptom
Detonation/Spark Knock Symptom
Rough, Unstable, or Incorrect Idle, Stalling Symptom (for Open Loop System)
Rough, Unstable, or Incorrect Idle, Stalling Sympton (for Closed Loop System)
Idle CO Concentration Check and Adjustment
Poor Fuel Economy Symptom
Dieseling, Run-On Symptom
Backfire Symptom
Cuts Out, Misses Symptom
Hesitation, Sag, Stumble Symptom
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WORKSHOP MANUAL
TF SERIES
GASOLINE ENGINE
(C22NE, 22LE, 20LE)
SECTION
6, 6A, 6B, 6C, 6D, 6E, 6F, 6G, 6H & 6J
Table of
Contents
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Chapters
Section 6 Engine Diagnosis
4
Section 6A Engine Mechanical
18
Section 6B Engine Cooling
107
Section 6C Engine Fuel
121
Section 6D1 Engine Electrical
138
Section 6D2 Ignition System
144
Section 6D3 Starting and Charging System
149
Section 6E Driveability and Emissions
171
Hesitation, Sag, Stumble Symptom (Cont'D)
274
Section 6F Engine Exhaust
478
Table of Contents
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