LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Toyota
>>
1991
>>
Land Cruiser
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Basic Testing - 6-CYL
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Engine Controls - Basic Testing - 6-CYL
Expand All (for easy ctrl-f)
Collapse All
Introduction
Preliminary Inspection & Adjustments
Visual Inspection
Mechanical Inspection
Compression
Exhaust System Backpressure
Fuel System
Notes
Fuel Pressure
Fuel Pressure Release
Fuel Pump Quick Test
Fuel System Pressure Test
Fuel Pump Control Circuit
EFI Main Relay
Circuit Opening Relay
Fuel Pump Relay & Fuel Pump Resistor (Supra)
Ignition Checks (Except Supra Turbo)
Diagnostic Codes (Except Supra Turbo)
Notes
Code 12 (No RPM Signal)
Code 13 (No RPM Signal)
Code 14 (Ignition Signal Problem)
Spark Test (Except Supra Turbo)
Ignition Coil Resistance Tests (Except Supra Turbo)
Primary Coil Resistance Test
Secondary Coil Resistance Test
Pick-Up Coil Resistance Test (Except Supra Turbo)
Cressida & Supra (Non-Turbo)
Land Cruiser
Pick-Up Coil Air Gap Check (Except Supra Turbo)
Ignition Checks (Supra Turbo)
Diagnostic Codes (Supra Turbo)
Notes
Code 12 (No RPM Signal)
Code 13 (No RPM Signal)
Code 14 (Ignition Signal Problem)
Spark Test (Supra Turbo)
Ignition System Connection Checks (Supra Turbo)
Ignition Coil (Supra Turbo)
Ignition Feed Circuit Test
Primary Coil Resistance
Ignition Coil Ground Test
Ignition Operational Check (Supra Turbo)
Feed To Ignitor Test
Pick-Up Coil Resistance Test (Supra Turbo)
Pick-Up Coil Air Gap Check (Supra Turbo)
IGNITOR Test (Supra Turbo)
Ignitor Power Transistor Check
Idle Speed & Ignition Timing
Notes
Idle Speed
Ignition Timing
Summary