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Fault code TCU 3. Eaton Fuller smart shift 10 speed. What is fault code TCU 3? Please respond to saslives@hotmail.com

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92 honda lx automatic is surging, not shifting right


Can be a few things. 1) Check the shift solenoids on top of the transmission (front). Remove them and clean out the screens. This would mean your transmission fluid is over due for changing. 2) Maybe it's the Vehicle Speed Sensor (VSS), locate and change that. It's on top of the transmission back under the thermostat area. 3) It could be your Transmission Control Unit (TCU). It's under the floor carpet on your passenger side near the firewall. There is a metal plater covering your ECU and your TCU. The TCU is the smaller box. Remove it, open it and look for burnt items. If you're handy you can replace those items. If you are replacing the unit, make sure it is from a known good one and it matches your car exactly, ie: EX, LX, DX, SE, sport shift button present?, etc... on the circuit board.

Below is a picture of the TCU opened up, here are the transmission codes that your car can display if you are inclined to jump the OBD wire plug to get the reading.

TCU Codes:

CODE LIST:

1-Lock-up solenoid 'A' circuit open or shorted.
2-Lock-up solenoid 'B' circuit open or shorted.
3-Throttle Position Sensor circuit open or shorted.
4-Vehicle Speed Sensor open or shorted - No signal from speedometer.
5-Shift Lever Position Switch circuit shorted.
6-Shift Lever Position Switch circuit open.
7-Shift Solenoid 'A' circuit open or shorted.
8-Shift Solenoid 'B' circuit open or shorted.
9-Counter shaft or transmission speed pulse generator open or shorted.
10-Coolant Temperature Sensor open or shorted.
11-Engine RPM (Ignition coil signal) open or shorted.
12-(No code 12 used)
13-Main shaft speed pulse generator open or shorted.
14-Linear (line pressure control) solenoid open or shorted.
15-Kick down switch circuit shorted.

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Oct 12, 2013 | 1992 Honda Accord

2 Answers

Transmission wont shift from high side too low side/ fuller 9speed


Have you Checked your Vacuum Line ? This is the most common issue with the High / Low Problems,....

Apr 08, 2013 | Ford "c" Cabover Semi Tractor-disalvo...

2 Answers

1992 honda accord tcu help


The first thing you need done is to have a tranny repair shop scan the "TCM" (not TCU) for fault codes.

Mar 23, 2017 | 1992 Honda Accord

3 Answers

Check engine light came on


What do you mean "can't find code"? If the check engine light is on, there is a fault code stored in your onboard computer - that's the way it works. If you are using a generic OBD code reader, that is most likely the reason you cannot find any codes. You need to use a scanner that has the correct software to access your ENTIRE computer network, not just the "continuous memory" or "generic" side of your computer system.

The window problem is a seperate problem and must be diagnosed accordingly.

Apr 23, 2012 | Daewoo Matiz Cars & Trucks

2 Answers

D4 lite flashes


Flashing D4 light is an error from the TCU (transmission control unit), so you got something going on with your transmission. If you want to pull the error code, remove the passengers side kick panel and look for a pair of wires with a blue connector at the end. Stick a paper clip or some other piece of wire into each hole of the connector to short the wires. Put your key in the ignition and turn 2 clicks. The D4 light will flash the code...short flashes=1 and long flashes=10. Add the number of short and long flashes to get your code. Errors are below:

0-Transmission control unit (TCU) faulty.
1-Lock-up solenoid 'A' circuit open or shorted.
2-Lock-up solenoid 'B' circuit open or shorted.
3-Throttle Position Sensor circuit open or shorted.
4-Vehicle Speed Sensor open or shorted - No signal from speedometer.
5-Shift Lever Position Switch circuit shorted.
6-Shift Lever Position Switch circuit open.
7-Shift Solenoid 'A' circuit open or shorted.
8-Shift Solenoid 'B' circuit open or shorted.
9-Counter shaft or transmission speed pulse generator open or shorted.
10-Coolant Temperature Sensor open or shorted.
11-Engine RPM (Ignition coil signal) open or shorted.
12-(No code 12 used)
13-Main shaft speed pulse generator open or shorted.
14-Linear (line pressure control) solenoid open or shorted.
15-Kick down switch circuit shorted.

Hope helps.

Aug 03, 2011 | 1992 Honda Accord

1 Answer

Intermittent Gearbox Fault


Suggest you get the TCU codes read (Jaguar dealer or well equipped auto box specialist). Suggest you don't go component changing without a believable diagnosis, could be TCU, could be pressure or speed/load sensors, lots of things, many not as expensive as a new TCU!

Jul 15, 2009 | 2001 Jaguar XJ8

1 Answer

Same as above...


your fault code says that the turbine shaft speed sensor (tss) has no signal.on this vehicles each and every sensor is important as they communicate to the ecu threw a can system which in turn communicate to the tcu (transmission) funny things will happen if the line of communication is disrupted pls respond on your findings

Jul 13, 2009 | 2003 Hyundai Tiburon

4 Answers

2001 Hyundai Santa Fe - Engine Code P1602, stuck in gear


Im having the same problem with my 02 Santa Fe. How do i go about fixing this problem? And is it costly? Please help

May 20, 2009 | 2001 Hyundai Santa Fe

1 Answer

Where is the tcu in a 2002 honda accord


it is the Transmission Control Unit. you have to find the reason why the TCU is flashing the D4 fault code. not replace the unit. have your vehicle scanned for another code. your transmission or transaxle is giving you a warning that something is wrong .

Nov 20, 2008 | 1992 Honda Accord

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