A/T - Un-Commanded Torque Converter Clutch Apply/DTC P1742
TSB 13-1-801/16/13
UN-COMMANDED TORQUE CONVERTOR CLUTCH -
PERCEPTION THAT VEHICLE LACKS POWER OR
TRANSMISSION IS UP-SHIFTING EARLY
FORD:
2011 Crown Victoria
2011-2013 E-150, E-250, E-350
LINCOLN:
2011 Town Car
MERCURY:
2011 Grand Marquis
ISSUE
Some 2011 Crown Victoria, Grand Marquis, Town Car and 2011-2013 E-Series vehicles equipped with a 4R75E transmission may exhibit an un-commanded torque converter clutch (TCC) apply or TCC partial apply immediately after the 1-2 shift. This may result in the perception that the vehicle lacks power or the transmission is up-shifting too early. Diagnostic trouble code (DTC) P1742 may be stored in the powertrain control module. In some vehicles while operating the vehicle in manual 2nd gear and when coming to a stop, the vehicle may experience a loss of RPM.
ACTION
Follow the Service Procedure Steps to correct the condition.
SERVICE PROCEDURE
1. Install IDS scan tool
2. Road test the vehicle and monitor (TCC %)
solenoid command state - duty cycle and (TC
SLIP ACT) torque converter clutch slippage -
RPM, while in 2nd, 3rd or 4th gear with a TCC
% reading 0.
a. If TCC % = 0 and TC SLIP ACT = less than 20 RPM then inspect the number 7 check ball in the main control valve body for damage. Replace as required following the appropriate Workshop Manual (WSM), disassembly and assembly of subassemblies
- Main Control Valve Body.
NOTE
THIS PROCEDURE IS PERFORMED IN 2ND GEAR AUTO (NOT MANUAL 2). MONITOR (TC SLIP ACT) AFTER THE POWERTRAIN CONTROL MODULE (PCM) COMMANDS 2ND GEAR AND BEFORE THE VEHICLE SPEED SENSOR (VSS) READS 56 KM/H (35 MPH).
b. If you receive any other reading, this article does not apply; Refer to WSM, Section 307-01A for normal diagnostics.
NOTE
IT IS NORMAL FOR THE PCM TO COMMAND
4TH GEAR AT SPEEDS AS LOW AS 30 KM/H (19
MPH) WITH LIGHT ACCELERATION WHEN THE
THROTTLE POSITION IS LESS THEN 20%.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage Warranty/ESP coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.
OPERATION DESCRIPTION TIME
130108A 2011 Crown Victoria, 2.3 Hrs.
Grand Marquis, Town Car,
2011-2013 Econoline:
Includes Time To Perform
The Diagnosis Outlined In
This Article And Repair
(Do Not Use With Any
Other Labor Operations)
DEALER CODING
CONDITION
BASIC PART NO. CODE
7E195 30
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