Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.2L - INTRODUCTION (2 OF 2))
2006 Isuzu Ascender S, 5.3 M, 4WD
Section 1 (Engine Control System - 4.2L - Introduction (2 Of 2))
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Section 1 (Engine Control System - 4.2L - Introduction (2 Of 2))
WARNING: This page is about a different variant/trim than selected.
- Specifications
- Schematic & Routing Diagrams
- Component Locator
- Powertrain Control Module (PCM) Connectors
- Engine Controls Connectors
- Accelerator Pedal Position (APP) Sensor Connector End View
- Camshaft Actuator Solenoid Assembly Connector End View
- Camshaft Position (CMP) Sensor Connector End View
- Crankshaft Position (CKP) Sensor Connector End View
- Engine Coolant Temperature (ECT) Sensor Connector End View
- Evaporative Emission (EVAP) Canister Purge Solenoid Connector End View
- Evaporative Emission (EVAP) Canister Vent Solenoid Connector End View
- Fuel Injector 1 Connector End View
- Fuel Injector 2 Connector End View
- Fuel Injector 3 Connector End View
- Fuel Injector 4 Connector End View
- Fuel Injector 5 Connector End View
- Fuel Injector 6 Connector End View
- Fuel Pump and Sender Assembly Connector End View
- Fuel Tank Pressure (FTP) Sensor Connector End View
- Heated Oxygen Sensor (HO2S) 1 Connector End View
- Heated Oxygen Sensor (HO2S) 2 Connector End View
- Ignition Coil 1 Connector End View
- Ignition Coil 2 Connector End View
- Ignition Coil 3 Connector End View
- Ignition Coil 4 Connector End View
- Ignition Coil 5 Connector End View
- Ignition Coil 6 Connector End View
- Knock Sensor (KS) 1 Front Connector End View
- Knock Sensor (KS) 2 Rear Connector End View
- Manifold Absolute Pressure (MAP) Sensor Connector End View
- Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector End View
- Secondary Air Injection (AIR) Pump (K18) Connector End View
- Secondary Air Injection (AIR) Pump Relay (K18) Connector End View
- Secondary Air Injection (AIR) Solenoid(K18) Connector End View
- Throttle Body Connector End View
- Engine Controls Component Views
- Engine Coolant Temperature (ECT) Sensor, Powertrain Control Module (PCM) & Generator Component View
- Evaporative Emission (EVAP) Canister Purge Solenoid, Starter, Crankshaft Position (CKP) Sensor & Knock Sensor Component View
- Secondary Air Injection (AIR) Solenoid, Camshaft Actuator Solenoid Assembly & Camshaft Position (CMP) Sensor Component View
- Heated Oxygen Sensor (HO2S) 1 Component View
- Throttle Body, Intake Air Temperature (IAT) Sensor & Manifold Absolute Pressure (MAP) Sensor Component View
- Ignition Coil & Fuel Injector Component View
- Exhaust Pipe Component View
- Automatic Transmission & Vehicle Speed Sensor (VSS) Component View
- Accelerator Pedal Sensor, Brake Pedal & Stop Lamp Switch Component View
- Secondary Air Injection (AIR) Pump & Secondary Air Injection (AIR) Pump Relay Component View
- Fuel Tank Component View (Short Wheel Base)
- Fuel Tank Component View (Long Wheel Base)
- Diagnostic Information & Procedures
- Repair Instructions
- Powertrain Control Module (PCM) Replacement
- CKP System Variation Learn Procedure
- Engine Coolant Temperature (ECT) Sensor Replacement
- Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Replacement
- Manifold Absolute Pressure (MAP) Sensor Replacement
- Heated Oxygen Sensor Replacement - Position 1
- Heated Oxygen Sensor Replacement - Position 2
- Accelerator Pedal with Position Sensor Replacement
- Throttle Body Assembly Replacement
- Fuel Pressure Relief Procedure
- Fuel Pressure Gage Installation and Removal
- Quick Connect Fitting(s) Service (Metal Collar)
- Quick Connect Fitting(s) Service (Plastic Collar)
- Fuel Tank Draining Procedure
- Fuel Tank Replacement (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Fuel Tank Replacement (TrailBlazer, Envoy, Rainier)
- Fuel Tank Pressure Sensor Replacement
- Fuel Level Sensor Replacement
- Fuel Sender Assembly Replacement
- Fuel Hose/Pipes Replacement - Chassis
- Fuel System Cleaning
- Fuel Rail Assembly Replacement
- Fuel Injector Cleaning Procedure
- Fuel Injector Replacement
- Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement
- Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank (TrailBlazer, Envoy, Rainier)
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine/Chassis
- Evaporative Emission (EVAP) Canister Replacement (TrailBlazer, Envoy, Rainier)
- Evaporative Emission (EVAP) Canister Replacement (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Evaporative Emission (EVAP) System Cleaning
- Ignition Coil(s) Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Crankshaft Position (CKP) Sensor Replacement
- Camshaft Position (CMP) Sensor Replacement
- Camshaft Position (CMP) Actuator Solenoid Valve Replacement
- Knock Sensor (KS) Replacement
- Secondary Air Injection (AIR) Pump Replacement
- Secondary Air Injection (AIR) Solenoid Valve Replacement
- Secondary Air Injection (AIR) Pipe Replacement
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Outlet Resonator Replacement
- Description & Operation
- Powertrain Control Module (PCM) Description
- Throttle Actuator Control (TAC) System Description
- Camshaft Actuator System Description
- Fuel System Description
- Fuel System Overview
- Fuel Tank
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Sender Assembly
- Fuel Level Sensor
- Fuel Pump
- Fuel Filter
- Fuel Pressure Regulator Assembly
- Fuel Feed Pipes
- Nylon Fuel Pipes
- Quick-Connect Fittings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Metering Modes of Operation
- Starting Mode
- Clear Flood Mode
- Run Mode
- Acceleration Mode
- Deceleration Mode
- Battery Voltage Correction Mode
- Fuel Cutoff Mode
- Fuel Trim
- Evaporative Emission (EVAP) Control System Description
- Electronic Ignition (EI) System Description
- Knock Sensor (KS) System Description
- Secondary Air Injection System Description
- Air Intake System Description
- Special Tools & Equipment
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.