PCM/Crank Position Sensor - Driveability Concerns
NO: 18-16-96GROUP: Vehicle Performance
DATE: May 3, 1996
SUBJECT:
Intermittent Driveability Problems When Driving Near Radar
MODELS:
1996 (NS) Town & Country/Caravan/Voyager
NOTE:
THE FLASH SECTION OF THIS BULLETIN APPLIES TO ALL VEHICLES BUILT PRIOR TO SEPTEMBER 27, 1995 (MDH 09-27-XX). THE INSTALLATION OF THE "HARDENED" CRANK SENSOR APPLIES TO ALL VEHICLES BUILT PRIOR TO NOVEMBER 1, 1995 (MDH 11-01-XX).
SYMPTOM/CONDITION:
Some vehicles may experience intermittent driveability concerns or problems when driven in close proximity to military or air traffic control radar installations.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRBIII) and appropriate.
Diagnostic Procedure Manual, verify that all engine systems are functioning correctly. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order for future reference and repair as necessary. If none are found, proceed to the repair procedure.
EQUIPMENT/PARTS REQUIRED:
1 4727336 Crankshaft Position Sensor, Hardened
1 CH6000 Scan Tool (DRB III)
1 CH7O35 General Purpose Interface Bus Cable (GPIB)
1 CH7000 J1962 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 19 OR HIGHER AND TIL CD RELEASE 1104 OR HIGHER MUST BE INSTALLED.
REPAIR PROCEDURE:
This bulletin involves installing a new "hardened" crankshaft position sensor and/or reprogramming (flashing) the PCM with new software calibrations (see application note).
Installation of Crankshaft Position Sensor:
1. Remove air cleaner assembly and inlet air tube.
2. Locate the crankshaft position sensor that is mounted to the transmission bell housing. Disconnect the electrical connector from the crankshaft position sensor.
3. Remove the sensor mounting screw.
4. Pull the crankshaft position sensor straight out and discard.
5. Insure that the paper spacer that comes with the new sensor is attached to the face of the sensor and install the new crankshaft position sensor (P/N 4727336).
6. While holding the crankshaft position sensor down against the mating surface, install the mounting screw and torque to 105 in. lbs.
7. Connect the electrical connector to the crankshaft position sensor.
8. Install the air cleaner assembly and inlet air tube, then proceed to the reprogramming procedure.
Reprogramming the PCM:
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 VEHICLE CONTROLLER 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 PGM 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: 08-19-43-94 0.5 Hrs.
FAILURE CODE: FM - Flash Module
Labor Operation No: 08-15-80-93 0.2 Hrs.
Replace Crankshaft Position Sensor
FAILURE CODE: P8 - New Part