Question about 2005 Ford Escape
Why is the PCM required to be removed? If your going to replace it, you will not be able to to just remove it and reinstall it without programming tools that are needed, and the expertise to program it with existing vehicle info. Replacing a PCM is not a plug & play engine management component anymore, like it was in the mid 90's.
Posted on May 22, 2011
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Posted on Jan 02, 2017
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Aug 11, 2014 | 1993 Ford Taurus
Mar 26, 2014 | 1997 Ford F250 SuperCab
Cherokee, Grand Cherokee, 1999-2005
Throttle Position Sensor
The 3 wire Throttle Position Sensor (TPS) is mounted on the throttle body and is connected to the throttle blade.
The TPS is a 3wire variable resistor that provides the Powertrain Control Module (PCM) with an input signal (voltage) that represents the throttle blade position of the throttle body. The sensor is connected to the throttle blade shaft. As the position of the throttle blade changes, the resistance (output voltage) of the TPS changes.
The PCM supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the PCM) represents the throttle blade position. The PCM receives an input signal voltage from the TPS. This will vary in an approximate range of from .26 volts at minimum throttle opening (idle), to 4.49 volts at wide-open throttle. Along with inputs from other sensors, the PCM uses the TPS input to determine current engine operating conditions. In response to engine operating conditions, the PCM will adjust fuel injector pulse width and ignition timing.
The PCM needs to identify the actions and position of the throttle blade at all times. This information is needed to assist in performing the following calculations:
Ignition timing advance Fuel injection pulse-width Idle (learned value or minimum TPS) Off-idle (0.06 volt) Wide Open Throttle (WOT) open loop (2.608 volts above learned idle voltage) Deceleration fuel lean out Fuel cutoff during cranking at WOT (2.608 volts above learned idle voltage) A/C WOT cutoff (certain automatic transmissions only)
Removal & Installation
3.7L & 4.0L
Dec 31, 2011 | 2001 Jeep Grand Cherokee
Aug 29, 2011 | 2001 Ford Focus
REMOVAL & INSTALLATION See Figures 1, 2, 3, 4, 5, 6, 7 and 8
Fig. Fig. 1: The PCM is mounted behind the fender, adjacent to the EVAP canister
Fig. Fig. 2: Remove the module-to-bracket retaining screws and ...
Fig. Fig. 3: ... remove the PCM (1) from the mounting bracket (2)
Fig. Fig. 7: Remove the EPROM cover, if the seal tears, this is normal, do not apply an adhesive to the pad, the adhesive could drip onto the circuitry and ruin the PCM
Fig. Fig. 8: Remove the EPROM by squeezing the two tabs and carefully separating the EPROM from the PCM
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