LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Jeep
>>
2000
>>
Grand Cherokee Laredo, 4.0 S, 4WD
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Basic Diagnostic Procedures
September 30: LEMON manuals is back up on a temporary server! Slowness is possible
Engine Controls - Basic Diagnostic Procedures
Expand All (for easy ctrl-f)
Collapse All
Introduction
Programming
Powertrain Control Module
Notes
Programming Powertrain Control Module
Updating Secret Key Data
Preliminary Inspection & Adjustments
Visual Inspection
Mechanical Inspection
Notes
Compression
Checking Engine Vacuum
Checking Engine Mechanical Systems
Fuel Systems
Notes
Fuel System Pressure Release
Fuel Pressure Test
Cherokee & Wrangler
Grand Cherokee
Fuel Pump Amperage Test
Cherokee
Grand Cherokee
Wrangler
Fuel Pump Volume Test
Fuel System Pressure Leak-Down Test
Cherokee & Wrangler
Grand Cherokee
Fuel Pump Control Circuit
Fuel Pump Relay
Ignition Systems
Checking Secondary Ignition (2.5L)
Camshaft Position Sensor
Crankshaft Position Sensor
No-Start Diagnosis
Engine Cranks But Does Not Start
Notes
Cherokee (2.5L)
Cherokee (4.0L)
Grand Cherokee
Wrangler (2.5L)
Wrangler (4.0L)
Engine Does Not Start & DRB Displays No Response
Notes
Cherokee
Grand Cherokee
Wrangler
Verification Tests
Test VER-1
Test VER-2
Summary