U3688 Trouble Code

View U3688 obd/2 error code description and symptoms. U3688 engine photo

The input turbine speed sensor detects rotation of the input shaft of the input shaft speed sensor transmission. The computer uses that information, along with the output shaft speed sensor to determine if the transmission is operating according to plan. If the computer detects a difference between the input shaft speed , and the expected output shaft speed, it will adjust transmission pump pressure to prevent clutch disc slip. If adding pressure doesn't solve the problem, it will set a trouble code.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

U3688 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U3688 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If throttle control unit malfunction so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the throttle control unit malfunction.

U3688 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Common Causes of U3688

A common cause of code U3688 is the failure of Throttle Control Unit Malfunction, but there are several other possible causes as well, such as ;

Faulty Air Flow Meter
Faulty Crankshaft Position Sensor (POS)
1Camshaft Position Sensor circuit poor electrical connection
Oil Control Valve (OCV) circuit is open or shorted

U3688 code for all cars

You can view according U3688 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U3688 Skoda Roomster

+U3688 Toyota Corolla

+U3688 Rover 414

+U3688 Plymouth Fury

+U3688 Ford Explorer V

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