This TSB applies to 2009 Acura TSX, from VIN JH4CU2….AC000001 through JH4CU2…AC009053. The engine pings during moderate to heavy acceleration.
According to Honda, the probable cause is that the PCM software, combined with knock sensor sensitivity, may not adjust the ignition timing as expected.
Honda says, “This condition does not cause internal engine damage. Some engine ping is a desired characteristic for optimal performance and fuel economy.”
The corrective action is to replace the knock sensor and update the PGM-F1 software with the HDS. If working on a vehicle with A/T, also update the A/T software. NOTE: On vehicles with A/T, you must update the A/T software to complete the repair.
REQUIRED PARTS/MATERIALS
Knock sensor P/N 30530-RL5-A01
Intake manifold gasket (4 needed) P/N 17115-R40-A01
Acura Long Life antifreeze/coolant Type 2, P/N 0L999-9001
SOFTWARE INFORMATION
HDS software version 2.019.009 (August 2009/gray) or later.
Control Module Update application version V6.18.06 or later.
Database update 05-AUG-2009 or later.
The updated PGM-F1 software program IDs and P/Ns are shown below. If these or a later program IDs are the current ones displayed during the update, the software for this service bulletin is already installed.
YEAR/MODEL SOFTWARE PROGRAM ID PROGRAM P/N
2009-10 TSX M/T
PGM-F1 ……………………………..L5A030…………….37805-RL5-A03
2009-10 TSX A/T
PGM-F1………………………………L5A530…………….37805-RL5-A53
2009-10 TSX A/T
A/T software………………………….L5A520……………..37806-RL5-A52
REPAIR PROCEDURE
- Replace the knock sensor. Refer to page 11-220 of the 2009-2010 TSX service manual, or online enter keyword KNOCK and select Knock Sensor Replacement from the list.
NOTE: Knock sensor replacement requires removal of the intake manifold. In step 6 of removal, the bracket does not need to be removed…just remove the bracket’s lower bolt. In step 10 of removal, the PCV hose does not need to be disconnected. In step 13 of installation, radiator refilling and cooling system bleeding is not needed... just top off the cooling system reservoir with about 6 ounces of coolant.
- Update the PGM-F1 software with the HDS. Refer to service bulletin 01-026 (Updating Control Units/Modules).
- A/T models only: Update the A/T software with the HDS.
