Engine Controls - MIL ON, DTC P0335, No Start
01-020/032003 MAZDA 6
ENGINE CRANKS BUT NO START - SETS DTC P0335
APPLICABLE MODEL(S)/VINS
All 2003 Mazda 6 with 2.3L engine
DESCRIPTION
In cold weather conditions of approx. 14 degrees F, the vehicle will crank, but will not start. The MIL illuminates and DTC P0335 is stored in memory. This is caused by the PCM calibration incorrectly reading the Crankshaft Position Sensor signal at a very specific engine RPM.
If the following conditions are met, the MIL will illuminate and set DTC P0335:
^ Engine cranks at 160 RPM (normal engine cranking is approx. 250 RPM).
^ No signal from the Crankshaft Position Sensor due to unknown conditions, or the PCM may be incorrectly reading the signal from the Crankshaft Position Sensor.
NOTE:
If both of the conditions above occur at the same time, and last for 4.2 seconds or more, the MIL will illuminate and set DTC P0335. A revised PCM calibration is available on WDS B24.6 or later software to resolve this concern.
REPAIR PROCEDURE
1. Verify concern.
2. Using WDS B24.6 or later software, reprogram the PCM to the latest calibration by following the "Module Reprogramming" procedure.
NOTE:
^ It is not necessary to remove any fuses or relays during PCM reprogramming when the WDS 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 WDS reprogramming procedure.
^ WDS shows the calibration part numbers after programming the PCM.
^ Please be aware that PCM calibration part numbers and file names listed in any Service Bulletin may change due to future releases of WDS software, and additional revisions made to those calibrations for service related concerns.
^ When reprogramming a PCM, WDS 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, if the WDS PTU is not docked and connected to 115V-120V, 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 will damage the WDS PTU.
NOTE:
You will need to update the PTU first, then install the needed calibration file that WDS shows during PCM reprogramming. Go to "WDS Calibration" on ESI and download the "update" file. If the PTU is not updated to the latest level, the calibration file will not install into the PTU.
3. After performing the PCM reprogramming procedure, make sure to perform "Self-Test", ALLCMDTCs" and erase any stored DTCs that appear after the reprogramming.
^ If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the appropriate Troubleshooting section of the 2003 Mazda6 Workshop Manual.
^ If no DTCs remain after erasing, road test the vehicle to verify that the MIL does not illuminate and no DTCs are stored in memory.
NOTE:
It is normal for some U**** DTCs and possibly C1119 to be stored after reprogramming modules on Mazda6 with WDS B24 software. After the DTCs are erased, no DTCs should be present.
WARRANTY INFORMATION
NOTE:
This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.