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The PCM is an electronic unit similar to your computer, it does not make noise. Where do you hear this noise and what does it sound like? Is it there all the time?
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Transmission control module is part of the PCM - powertrain control module . Engine an transmission module all in one . It's in the engine compartment .
Powertrain Control Module (PCM) 4.8L,5.3L,6.0L
Near the left front inside the engine compartment
Powertrain Malfunction (Wrench) Warning Indicator (base instrument cluster)
The instrument cluster receives the powertrain status from the PCM over the high speed CAN. When a powertrain system concern is detected, the PCM sends the instrument cluster a command signal to illuminate the powertrain malfunction (wrench) warning indicator. If the 4WD control module detects a failure with the 4WD drive system, the 4WD control module sends a message to the instrument cluster over the CAN to illuminate the powertrain malfunction (wrench) warning indicator. On 4.6L engines, if the transmission control module (TCM) detects a failure with the transmission, the TCM sends a message to the instrument cluster over the CAN to illuminate the powertrain malfunction (wrench) warning indicator.
better have it checked !
Bett
Doesn't have one . all electronically controlled . An it was a vacuum modulator valve.
Transaxle Electronic Control System
Electronic System Description
Shift timing, shift feel (line pressure) and torque converter clutch control in the AX4S are controlled electronically by the powertrain control module (PCM) (12A650) and its input/output network. The transmission control is separate from the engine control strategy in the powertrain control module, although some of the input signals are shared.
Some input signals come from the engine-related sensors, for example, mass air flow sensor (MAF sensor) (12B579) and engine coolant temperature sensor (ECT sensor) (12A648) to give the powertrain control module an idea of the load and climate under which the engine is operating. Some other inputs are based on driver inputs, such as accelerator pedal position which is related to the powertrain control module by the throttle position sensor (TP sensor) (9B989). Still other inputs are provided by the transaxle itself, from sensors such as the vehicle speed sensor (VSS) (9E731), transmission range (TR) sensor (controlled by the placement of the selector lever) and the transmission fluid temperature sensor.
Using all of these input signals, the powertrain control module can determine when the time and conditions are right for a shift or torque converter clutch application. The powertrain control module can also determine the line pressure needed to optimize shift feel. To accomplish these functions, the powertrain control module controls five electronic solenoids - three on/off solenoids for shifting, one pulse-width modulate solenoid for torque converter clutch control and an electronic pressure control (EPC) solenoid for line pressure control.
Do you mean the transmission control module ? It is incorporated into the engine control module . PCM - powertrain control module .
Powertrain Control Module (PCM) (L36/L67)
Left front of the engine compartment, inside the air cleaner assembly
Engine Controls Component Views in Engine Controls - 3.8L
Powertrain Control Module Connector End Views in Engine Controls - 3.8L
Powertrain Control Module (PCM) (LG8)
Left front of the engine compartment, inside the air cleaner assembly
Possible causes
- Faulty Powertrain Control Module (PCM)
- Powertrain Control Module (PCM) harness is open or shorted
- Powertrain Control Module (PCM) cicuit poor electricl connection
- Low battery voltage
This code indicates an error or fault in the powertrain control module memory. A common procedure known as memory flashing is performed at the dealer. The vehicle's computer (powertrain control module) memory is erased, then replaced with an updated version of the previous driveability program. If the powertrain control module doesn't store the program, then a replacement module would be the next likely service.
the pcm (powertrain control module) monitors and controls all engine sensors. it also controls many other things including fuel pump, evap system, and tire monitors. its pretty much the heart of the whole car. all other modules like the TCM (transmission control module) and bcm(body control module) run through the pcm
This generic "U" trouble code applies to all car makers and indicates
a problem between the PCM and the body control module. This is likely
the result of a problem in the data link between the two modules.
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