TSB's

False Acura oil pressure

This TSB applies to 2007-2011 Acura MDX, 2009-2010 RL and TL, 2010 TSX V6 and 2010-2011 ZDX models.

With a normal engine oil level, a “check engine oil level” message may appear on the MID or the navigation screen. The low oil pressure indicator on the instrument panel may also be on.

The probable cause is a faulty engine oil pressure switch. Replace the engine oil pressure switch. For 2007 and early production 2008 MDX models, also check the PGM-F1 software and, if necessary, update it with the HDS.

NOTE: On 2007 MDXs and early-production 2008 MDXs, the threads of the pressure switch are different than on all other models listed. To make sure that you install the correct switch, use the oil pump ID information in Step 3 of the repair procedure.

ENGINE OIL PRESSURE SWITCH P/N

2007 and early MDX………………37240-RDM-A01

   All other models…………………...37240-R72-A01

O-ring for the R72 switch only………91319-R70-A01

TL flange bolts (2)…………………..90170-SDA-A01

TSX V6 flange bolts (2)……………..90170-SDC-A00

TL AND TSX V6 flange bolt (1)……90396-A5A-010

Only 2007-2008 MDX models may need a software update. Use HDS software version 2.020.018 (December 2009/green) or later.

YEAR/MODEL                 PROGRAM ID         PROGRAM P/N

2007 MDX…………………YEA580………………37805-RYE-A58

2008 MDX………………….YEA630………………37805-RYE-A63

REPAIR PROCEDURE

1. Start the engine, turn the steering wheel fully to the right and shut off the engine.

2. Raise the vehicle on a lift.

3. 2007-2008 MDX: Detach the front clip from the right front inner fender. Pull back the edge of the inner fender, and look for an “R72” mark on the right side of the oil pump. If the oil pump has the R72 mark, use P/N 37240-R72-A01 engine oil pressure switch. If the oil pump does not have the R72 mark, use pressure switch P/N 37240-RDM-A01.

4. Re-attach the front clip to the right front inner fender (on 2007-2008 MDX models).

5. For TL and TSX V6 models, remove the front subframe middle mount. This is secured with two 10-1.25 bolts and one 12-1.25 bolt. Upon reinstallation, tighten the 10 mm bolts to 36 ft.-lbs. and the 12 mm bolt to 33 ft.-lbs.

6. For easier removal of the engine oil pressure switch, disconnect the rocker arm oil pressure switch connector.7. Disconnect the engine oil pressure switch connector and remove the switch.

8. Remove any liquid gasket from in and around the switch hole.

9. Apply a very thin layer of liquid gasket to the threads of the new switch. On R72 applications only, install a new O-ring. Install the new switch and tighten to 13 ft.-lbs.

10. Reconnect the engine oil pressure switch connector and the rocker arm oil pressure switch connector.

11. On TL and TSX V6 applications, reinstall the front subframe middle mount with new bolts and torque to specification.

On MDX models, look for the “R72” mark on the oil pump.
<p>On MDX models, look for the &ldquo;R72&rdquo; mark on the oil pump.</p>

Note the locations of the engine oil pressure switch and the rocker arm oil pressure switch.
<p>Note the locations of the engine oil pressure switch and the rocker arm oil pressure switch.</p>

Tags: Acura 
Post a comment
 

Comments (1)

 

Post a Comment

Submit
Subscribe Today

Subscribe to Auto Service Professional

Sign up for a FREE subscription to Auto Service Professional magazine

Subscribe