CX-9 AWD V6-3.7L (2008)
Engine Control Module: All Technical Service Bulletins
Engine Controls - Cold Engine Ping/Spark Knock
Bulletin No: 01-035/10
Last Issued: 06/02/2010
Subject:
ENGINE SPARK KNOCKING / PINGING TYPE NOISE WHEN COLD
APPLICABLE MODEL(S)/VINS
2008-2010 CX-9
DESCRIPTION
At moderate acceleration and under engine load, some vehicles may exhibit a knocking/pinging type noise from the engine. The noise can be heard only
when the engine is cold. It disappears after the engine reaches normal operating temperature.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Interview customer and verify concern.
2. Proceed to MS3 online or Workshop Manual (section 01-03 NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE [MZI-3.7]).
3. If Workshop Manual service procedures do not resolve concern, proceed to step 4.
4. Reboot the IDS to clear memory before reprogramming.
5. Using IDS 66.08A or later software, reprogram the PCM to the latest calibration (refer to Calibration Information" tables) by following the Module
Reprogramming" procedure.
NOTE:
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Always update the IDS tool first, then follow on-screen instructions to download the needed calibration file for PCM reprogramming.
^
It is not necessary to remove any fuses or relays during PCM reprogramming when the IDS screen prompts you to do so. You may
accidentally stop power to one of the PCM terminals and cause the PCM to be blanked, or you may receive error messages during the IDS
reprogramming procedure.
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IDS shows the calibration part numbers after programming the PCM.
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Please be aware that PCM calibration part numbers and file names listed in any Service Bulletin may change due to future releases of IDS
software, and additional revisions made to those calibrations for service related concerns.
^
When reprogramming a PCM, IDS will always display the latest" calibration P/N available for that vehicle. If any calibration has been
revised/updated to contain new information for a new service concern/issue, it will also contain all previously released calibrations.
^
When performing this procedure, we recommend that a battery charger be installed on the vehicle battery and turned ON to a maximum
charge of no more than 20 AMPS to keep the vehicle battery up to capacity. If you exceed 20 AMPS, it could damage the VCM.
