Grand Caravan L4-2.4L DOHC (1996)
Crankshaft Position Sensor: Customer Interest
PCM/Crank Position Sensor - Driveability Concerns
NO: 18-16-96
GROUP: 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.
