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 Isuzu Axiom Base, 4WDFACTORY OEM SERVICE PROCEDURE
Component Locators: Notes
ENGINE COMPONENT LOCATOR TABLE
| Number | Name | Location |
|---|---|---|
| 1 | Throttle Position (TP) Sensor | On the throttle body |
| 2 | Check Engine Lamp (MIL) | On the instrument panel beneath the tachometer |
| 3 | Positive Crankcase Ventilation (PCV) Valve | On the left of the cylinder head cover |
| 4 | Air Cleaner | Left front of the engine bay |
| 5 | Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor | Attached to the air filter box |
| 6 | Induction Air Control Valve | Rear side of the common chamber |
| 7 | Common Chamber | Top of the engine |
| 8 | EVAP Duty Solenoid Valve | Bolted to the left side of the common chamber. |
| 9 | Fuse/Relay Box | Along the inside of the right fender |
| 10 | Throttle Body | Between the intake air duct and the Common Chamber |
| 11 | Engine Coolant Temperature Sensor | On the coolant crossover pipe at the front of the engine, near the throttle body |
| 12 | Engine Control Module (ECM) | Along the inside of the left fender |
UNDERCARRIAGE COMPONENT LOCATOR TABLE
| Number | Name | Location |
|---|---|---|
| 1 | Fuel Pump Assembly and Vapor Pressure (Fuel Tank Pressure) Sensor | Installed in the top of the fuel tank |
| 2 | Fuel Gauge Unit | Installed in the top of the fuel tank |
| 3 | Evaporative (EVAP) Canister | On the top of the bracket that is located behind the cross member |
| 4 | Vent Solenoid (EVAP Canister) | On the top of the bracket that is located behind the cross member |
| 5 | Fuel Filter | Located along the inside of the right frame rail, ahead of the fuel tank |
| 6 | Vehicle Speed Sensor (VSS) | Protrudes from the transmission housing, just ahead of the propeller shaft |
| 7 | Heated Oxygen Sensor (Bank 1, HO2S1) | Threaded into the exhaust pipe ahead the right-hand catalytic converter |
| 8 | Heated Oxygen Sensor (Bank 1, HO2S 2) | Threaded into the exhaust pipe behind of the right-hand catalytic converter |
| 9 | Heated Oxygen Sensor (Bank 2, HO2S1) | Threaded into the exhaust pipe ahead of the left-hand catalytic converter |
| 10 | Heated Oxygen Sensor (Bank 2, HO2S 2) | Threaded into the exhaust pipe behind the left-hand catalytic converter |
| 11 | Low Fuel Pressure Sensor | Install in the side of transmission (Side of LH) |
| 12 | Fuel Pump Controller | Installed on the LH rear flame side |
Factory Service Tools
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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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