Drivetrain - TCS Lamp ON/No DTC's or DTC P1889 Set
TSB 08-4-1103/03/08
TRACTION CONTROL LAMP ON - NO DTCS
PRESENT, OR DTC P1889 IN DIFFERENTIAL
ELECTRONIC MODULE (DEM)
FORD:
2005-2007 Five Hundred, Freestyle
MERCURY:
2005-2007 Montego
This article supersedes TSB 06-6-3 to update the symptom and the Service Procedure.
ISSUE
Some 2005-2007 Five Hundred, Freestyle, and Montego vehicles equipped with All Wheel Drive (AWD) may exhibit the traction control warning lamp on. If the traction control lamp is on but no diagnostic trouble codes (DTCs) are retrieved, be sure to directly self test the DEM (4X4 module) using the diagnostic scan tool.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1. Install the diagnostic scan tool and retrieve any available DTCs from the DEM, Anti-Lock Brake System (ABS) module and Instrument Cluster. If there are DTCs in the ABS module or instrument cluster, refer to Workshop Manual (WSM), Section 206-09 for ABS or WSM, Section 413-01 for instrument cluster for proper diagnostics. Do not continue with this TSB.
NOTE
ALTHOUGH THE SAME WARNING LAMP IS SHARED FOR BOTH SYSTEMS, THE DTCS FOR THE AWD AND TRACTION CONTROL SYSTEM ARE NOT STORED IN THE POWERTRAIN CONTROL MODULE (PCM) AS ON SOME OTHER FORD/MERCURY VEHICLES. THE DEM (4X4 MODULE) MUST BE SELECTED, AS IT IS AN OPTIONAL MODULE ONLY USED ON AWD VEHICLES. TRACTION CONTROL DTCS ARE STORED IN THE ABS MODULE. VEHICLE WIRING AND COMMUNICATION DTCS RELATED TO THE AWD AND TRACTION CONTROL SYSTEM ARE STORED IN THE INSTRUMENT CLUSTER.
2. If DTC codes other than P1889 are present in the DEM, refer to WSM, Section 205-00 for additional diagnostic routines and do not follow this TSB procedure.
3. If DTC code P1889 is the only code present in the DEM, replace the oil pressure/temperature sensor (4B487) and clear the code. Refer to WSM, Section 205-02 under DEM In-Vehicle Repair.
NOTE
WHEN REPLACING THE OIL PRESSURE / TEMPERATURE SENSOR, THE 0-RING SEAL (INCLUDED IN THE KIT) ON THE ADJACENT SOLENOID VALVE MUST ALSO BE REPLACED.
NOTE
THE SOLENOID VALVE NORMALLY COMES OUT OF THE ON-DEMAND COUPLING AS THE DEM IS REMOVED. IF IT DOES NOT, EITHER REMOVE IT BY HAND, OR CAREFULLY REMOVE IT WITH PLIERS.
4. Remove the existing 0-ring from the coupling body. (Figure 1)
5. Install the new 0-ring included in the Pressure Sensor Kit, on the solenoid valve. (Figure 2)
6. Install the solenoid valve and oil pressure/temperature sensor into the DEM (not into the coupling body) prior to assembling the DEM to the coupling body.
NOTE
INSTALL THE OIL PRESSURE / TEMPERATURE SENSOR WASHER WITH THE CONCAVE (DISHED) SIDE FACING THE DEM.
7. Perform a dynamic evaluation.
a. Start the engine and allow the vehicle to idle for a minimum of 5 minutes with the transmission in park.
b. Perform five (5) 0-25 MPH (0-40 Km/h) wide-open-throttle accelerations.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
080411A 2005-2007 Five Hundred, 1.0 Hr.
Freestyle, Montego AWD
Replace The Pressure
Sensor Includes Time To
Check DTCs And, Road
Test (Do Not Use With
12650D, 12650DX1,
12651D, 12651DX1,
12651D4)
DEALER CODING
CONDITION
BASIC PART NO. CODE
4B487 42
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