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.
2004 Honda Pilot EXFACTORY OEM SERVICE PROCEDURE
Fuel & Emissions System
- Special Tools
- General Troubleshooting Information
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Descriptions
- Electronic Control System
- PCM Data
- PCM Inputs & Outputs At Connector A (32P)
- PCM Inputs & Outputs At Connector B (25P)
- PCM Inputs & Outputs At Connector C (31P)
- PCM Inputs & Outputs At Connector D (16P)
- PCM Inputs & Outputs At Connector E (20P)
- Vacuum Hose Routing
- Vacuum Distribution
- PGM-FI System
- Notes
- Alternator Control
- A/C Compressor Clutch Relay
- A/C Switch
- Barometric Pressure (BARO) Sensor
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Ignition Timing Control
- Injector Timing & Duration
- Intake Air Temperature (IAT) Sensor
- Knock Sensor
- Malfunction Indicator Lamp (MIL) Indication (In relation To Readiness Codes)
- Manifold Absolute Pressure (MAP) Sensor
- Primary Heated Oxygen Sensor (Primary HO2S)
- Secondary Heated Oxygen Sensor (Secondary HO2S)
- Starting Control
- Throttle Position (TP) Sensor
- Idle Control System
- Fuel Supply System
- Intake Air System
- Catalytic Converter System
- Exhaust Gas Recirculation (EGR) System
- Positive Crankcase Ventilation (PCV) System
- Evaporative Emission (EVAP) Control System
- Idle Control System Diagram
- Intake Air System Diagram
- Exhaust Gas Recirculation (EGR) System Diagram
- Evaporative Emission (EVAP) Control Diagram
- How To Set Readiness Codes
- Malfunction Indicator Lamp (MIL) Indication (In Relation To Readiness Codes)
- Catalytic Converter Monitor & Readiness Code
- Evaporative Emissions (EVAP) Control System Monitor & Readiness Code
- HO2S Monitor & Readiness Code
- HO2S Heater Monitor Readiness Code
- Misfire Monitor & Readiness Code
- Fuel System Monitor & Readiness Code
- Comprehensive Component Monitor & Readiness Code
- EGR Monitor & Readiness Code
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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