PCM - Ticking Noise from Engine Compartment
NO: 18-39-95GROUP: Vehicle Performance
DATE: Dec. 8, 1995
SUBJECT:
"Ticking" Noise from Engine Compartment
MODELS:
1995 (PL) Neon
NOTE:
This bulletin does not apply to vehicles that have had the Powertrain Control Module reprogrammed on TSB 18-36-95,18-20-95 Rev. A, or 18-38-95 dated December 08, 1995.
SYMPTOM/CONDITION:
Customer complaint of a "ticking" noise at idle from engine compartment. Condition is more noticeable in cold ambient under 40°F.
DIAGNOSIS:
Disconnect the electrical connector from the Duty Cycle Evap Purge Solenoid, located over the right front engine mount. If the noise goes away, proceed to the Repair Procedure. If a "ticking" noise is still evident, further diagnosis and repair will be necessary which will not be covered in the bulletin. Before continuing, Diagnostic Trouble Code (DTC) "EVAP PURGE SOLENOID CIRCUIT" will have been set and will have to be erased from memory.
EQUIPMENT/PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7015 Engine Cable
1 4669020 Label - Authorized Software Update
1 4275086 Label - Authorized Modification
NOTE:
The Mopar Diagnostic System is required to perform the following repair and the system must be operating with release 18 or higher and TIL CD release 1095 or higher must be installed.
REPAIR PROCEDURE:
This repair involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibrations) which disables the Duty Cycle Evap Purge Solenoid at idle when the ambient temperature is less than 0°F, and delays solenoid operation at idle for 30 minutes when the ambient temperature is between 0°F. and 40°F.
1. Connect the MDS (Mopar Diagnostic System) and DRB III (Scan Tool) to the vehicle and power them up.
2. Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRB III MAIN MENU Screen.
3. Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.
4. Use the arrow keys and select CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.
5. Use the arrow keys and select PROGRAM CONTROLLER PART on the MDS, then press NEXT MENU.
6. Follow the steps presented on the MDS and DRB III which will allow the DRB III to obtain the current part number of the PCM.
7. The MDS will display the part number of the PCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.
^ If the PCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the PCM on the vehicle and compare it to the part number displayed. If the PCM has already been updated, then another condition exists that will require further diagnosis and repair.
8. The MDS and DRB III will prompt for any operator action needed during the remainder of the programming process.
NOTE:
The following steps are required by law.
9. Type the necessary information on the "Authorized Software Update Label" and attach it to the PCM and cover the label with a clear plastic sticker.
10. Type the necessary information on the Authorized Modification Label and attach the label near the VECI Label.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-43-93 0.5 Hrs.
Powertrain Control Module Update
FAILURE CODE: FM - Flash Module