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U0404 Invalid Data Received From Gear Shift Control Module UPDATED

U0404 Invalid Data Received From Gear Shift Control Module

Lawmaking	Fault Location	Probable Crusade
U0404	Invalid data received - gear shift module (Purchase Role On Amazon)

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What Does Code U0404 Mean?

If a diagnostic problem code U0404 is exhibited, it means that the powertrain control module (PCM), transmission control module (TCM), or body control module (BCM) take detected an invalid signal from the gearshift control module. The gearshift control module is responsible for monitoring the actual position of the gearshift and providing the various controllers with the advisable input signal to reflect actual shifter position.

In nearly application, the gearshift module is a housing that contains the electronic components and the mechanical parts of the gear shifter. Other systems utilize a gearshift sensor and a remotely located gearshift module.

gearshft module

The PCM uses gearshift position data when calculating fuel delivery strategy, ignition timing, and sure manual shift control functions. If the PCM (or transmission control module) detect a vehicle speed sensor (VSS) point that is not appropriate for the gear position input signal, a code will exist stored and a service engine shortly lamp may exist illuminated.

In addition to input data from the VSS, other input signals including (simply not limited to) turbine speed sensor data, output speed sensor information, and engine RPM data are likewise calculated by the PCM when determining the appropriate gear designation for the actual circumstance. This information is as well used to map engine drivability and engine performance strategy.

In this example, and in the case of nearly vehicles that are equipped with electronic paddle shifters, overdrive select switches, and electronic mode select functions, the vehicle which exhibits a U0404 Invalid Data Received from Gear Shift Control Module code is equipped with a gearshift command module every bit opposed to a gearshift selector (or neutral safety/gearshift position) switch. This blazon of gearshift control module is too ofttimes used where the vehicle is equipped with electronic traction control.

What are the common causes of code U0404?

A defective system power relay
Corroded or damaged fuses or fusible links
Loose, corroded, or disconnected basis wires and/or straps
Cutting, burnt, or otherwise damaged wiring harnesses or connectors
A defective gearshift module
A defective PCM or manual controller

What are the symptoms of code U0404?

Reduced manual performance
Diminished engine fuel efficiency and operation
Erratic transmission shifting patterns
Illumination of the service engine soon lamp, traction command lamp, or antilock malfunction lamp
Inoperative speedometer
Inoperative paddle shifter/due south
Inoperative mode selector switch

How do you troubleshoot code U0404?

I would begin my diagnosis of a U0404 Invalid Data Received from Gear Shift Control Module code with a careful (admitting practical) visual inspection of all system wiring and connectors. I always include an inspection of the battery, battery cables, and bombardment terminal ends in my diagnosis. Clean, repair, or replace damaged, burnt, or corroded wiring and/or components as required. Test all system fuses, excursion breakers, and power supply relays and supervene upon lacking parts as necessary.

power relay

One might proceed by retrieving and making a notation of all stored trouble codes and available freeze-frame data before clearing the codes and continuing with their diagnosis.

Some type of diagnostic scanner, a digital volt/ohmmeter (DVOM), and a manufacturer'south service manual volition bear witness instrumental in a right diagnosis of this code.

The most straightforward method for determining whether the gearshift module is providing an input signal to the PCM is via a scanner (if available). Subsequently the scanner has been placed in such a way as to view the system data stream, observe the perceived position of the gearshift as information technology is moved through its range of motion. Note the perceived input signal position of the gearshift every bit it corresponds to the actual position and make annotation.

If the actual gearshift position fails to correspond with the perceived position, keep by verifying that all mechanical aspects of the gearshift mechanism (don't overlook the shifter cablevision) are operating properly. Repair loose, worn, binding, or broken parts as required.

shifter cables

Should the mechanical aspects of the gearshift machinery prove to be intact, go on by testing the output signal of the gearshift control module using the scanner and the DVOM. Consult the service manual to determine what the appropriate signal must be from the gearshift command module.

If the gearshift control module fails to provide an acceptable output indicate, continue past testing for system ability and footing signals. If either of these signals evidence to exist absent, check the service manual to discover their respective points of origin and resume your testing at the designated point. Power to this blazon of module is more often than not supplied using some type of relay. System ground signals are most likely furnished via a chassis ground or central engine ground. Consult the manufacturer's service manual for the exact location of each system grounds.

Should the system ground and voltage signals prove to be present, and gearshift control module output signals are non, suspect an internal malfunction in the gearshift control module.

If the gearshift control module provides an output signal that is non received by the PCM, disconnect all electrical connectors from related controllers and employ the DVOM to test resistance and continuity on each individual organisation circuit. Be conscientious to remove electrical connectors from controllers earlier testing resistance and continuity (using the DVOM) on organisation circuits. Failure to do then may event in controller impairment. Repair or replace open or shorted circuits equally required. System circuits may be shorted to ground or voltage. They may as well be open.

Depending upon the location of the faulty circuit, it may prove advantageous to replace it as opposed to repairing it. Circuits that are "buried" deep in a bulky harness, circuits that are subconscious in and under the nuance, and circuits that pass through a bulkhead are nearly impossible to physically locate and repair. These types of circuits are more easily cut and replaced using a section of wiring of an identical gauge and like length. I prefer to solder replacement circuits into place to provide a durable and reliable solution to the malfunction.

Now, having tested all system circuits and finding them in order, suspect an internal fault with the PCM. At that place is no method for testing either of the controllers mentioned herein and condemnation of these types of components is typically narrowed downward to a process of emptying. Replacement of said controllers will likely crave specialized reprogramming of some sort.

U0404 Invalid Data Received From Gear Shift Control Module UPDATED