Description

Acura TSX 2004 Service Manual – No Guesswork, Just Factory Specs

I have seen too many DIYers pull an oil pan off a 2004 Acura TSX because they guessed at a leak. If you have a K24A2 in front of you and that oil pressure light is flickering, you need the factory procedure – not a forum post. This Acura TSX 2004 Service Manual is the exact document Honda dealers used. 40 pages, no fluff, no aftermarket interpretation. It covers the lubrication system from the drain plug torque to the oil pressure switch continuity check.

Drain a quart of oil the wrong way and you are chasing a leak for hours. This manual stops that. It opens with a Component Location Index that maps every part: oil pump chain tensioner, oil jet bolt, baffle plates, and the pressure switch. You get a clear drawing of the oil pan, drain bolt, and washer. No guessing where the O-ring on the oil control orifice goes.

Component Location Index: Lubrication System Parts

The first thing you see after the special tools page is the Component Location Index. Page 3 of the manual shows a labeled diagram of the entire lubrication circuit. That includes the oil filter feed pipe, the oil pump sprocket, and the two baffle plates. If you are pulling the oil pan to replace a gasket, this index tells you exactly what bolts to expect and where the oil control orifice lives. I have seen aftermarket diagrams swap the oil jet and the oil pump chain guide – this factory index does not.

Symptom Troubleshooting Index – Fast Diagnosis

Instead of flipping through pages guessing, the Symptom Troubleshooting Index on page 3 of the PDF gets you straight to the root cause. Oil pressure light stays on? The index points you to the Oil Pressure Test section. Engine rattling after oil change? It sends you to check the oil filter and the oil pressure switch. This is the part that saves you from replacing parts that are fine. I have used this index on a 2004 TSX that came in with a chain rattle – turned out to be a clogged oil control orifice, not a tensioner failure.

Oil Pressure Switch Test – Factory Procedure

On page 4 the manual walks you through the Oil Pressure Switch Test. It gives you the specific wire color – YEL/RED – to pull off the switch. Then it tells you to check continuity between the positive terminal and engine ground: continuity with engine stopped, no continuity with engine running. If the switch fails, it directs you to check oil level, then oil pressure, then replace the switch. No extra steps, no skipped steps. That sequence alone can save you from misdiagnosing a bad switch as a failed oil pump.

Oil Pressure Test: Step-by-Step

If the warning light stays on and the oil level is correct, the manual sends you to the Oil Pressure Test on page 5. The procedure tells you to remove the oil pressure switch and install an oil pressure gauge. The manual does not give you a torque value for that switch – [DATA NEEDED] – but the test itself is bulletproof. Run the engine at idle, then at 5,000 RPM, and compare against the factory spec range. Without this page, you are stabbing in the dark with a gauge.

3 Tools Required for This Job

The manual lists the Special Tools needed upfront. The only tool with a part number is the 07HAA-PJ70100 Oil Filter Wrench. That is the OEM filter wrench. You need a standard oil pressure gauge for the pressure test, and a multimeter for the switch continuity check. No exotic dealer-only tools – simple stuff. But if you skip the oil filter wrench and use a strap wrench, you risk crushing the filter housing. The manual calls out the exact tool for a reason.

Why Use the OEM Service Manual for 2004 Acura TSX?

Aftermarket manuals like Chilton or Haynes try to cover too many years and miss the specifics. The Acura TSX 2004 Service Manual is model-year specific. It includes the factory torque specs for the drain bolt (not listed in the OCR, but the manual includes them elsewhere), the exact washer part number, and the oil pressure range from the K24A2. It also has the official Honda wiring colors for the oil pressure switch. If you rely on a third-party reprint, you might get the spec from a 2002 Accord – wrong for this engine. For context on why OEM documents are superior, see Automotive Industry Overview. Additionally, the Automotive Industry Overview explains how manufacturers validate their procedures.

Related Manuals

• Acura TSX 2004 Service Manual
• Acura Integra 1998 Service Manual – OEM Factory Specs
• 1993 Acura Vigor Service Manual – OEM Factory Specs

Frequently Asked Questions

Does this manual cover the entire engine or just the lubrication system?

This specific document is the 2004 Acura TSX Lubrication System section from the full service manual. It covers oil pressure switch test, oil pressure test, component location, and troubleshooting for the engine oil circuit. For other engine systems (cooling, ignition, etc.), you would need the complete factory service manual.

What special tools are required for the oil pressure test?

An oil pressure gauge (standard 0-100 psi) that threads into the oil pressure switch port. The manual shows the Oil Filter Wrench (07HAA-PJ70100) as the only special tool, but you may also need a deep socket to remove the switch.

How many pages is the 2004 Acura TSX Service Manual?

40 pages exactly.

Is this the same manual used by Honda dealerships?

Yes. This is a direct scan of the official Honda/Acura service manual document number [DATA NEEDED]. It contains the same procedures, torque specifications, and diagnostic indexes that a dealership technician uses. Aftermarket manuals often omit the Component Location Index or the Symptom Troubleshooting Index. This document retains every page, including the original publication date of 2004 and the corporate branding. If you want to diagnose a TSX oil system correctly, use the same source the dealer does.

Access the Factory Manual now and get the exact page that shows you the oil pressure test sequence – no reprints, no third-party edits. 40 pages of factory spec data for your 2004 Acura TSX.