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EZ-TCU™ 

Transmission Control Unit

Thank you for choosing TCI® products; we are proud to be your manufacturer of choice. Please read 
this instruction sheet carefully before beginning installation, and also take a moment to review the 
included limited warranty information. 

INSTALLATION

 

System Components Overview 

 

The EZ-TCU™ system is made up of several main components. A TCU (Transmission Control Unit), 
a wiring harness, a handheld user interface, and an RPM module. Please read through all of the 
installation notes before beginning the installation. 

 

TCU 

 

TCU Installation Notes: 

The TCU is water tight when connected to the wiring harness. It can be mounted in the engine
compartment or in the vehicle’s interior. It is good practice to mount the TCU with the
connector facing down. This way, there is less chance of moisture getting into the TCU if it
needs to be disconnected in wet conditions.

The TCU should not be mounted close to other electrically “noisy” components. In particular,
keep good spacing (try for 2 feet minimum) from ignition components (ignition boxes, coils,
distributors, etc.)

If mounting in the engine compartment, selecting a location towards the rear will make it easier
to route the communications cable to the interior to allow the handheld to be monitored while
driving. Optional, longer communications cables are available if needed.

There is an LED on the front face of the TCU – the side with the logo. It will flash if the on-
board diagnostics detects a problem (the LED is lit solid when the TCU is powered up and
working normally). To take advantage of this feature, the TCU will need to be mounted so that
the front face of the TCU is visible. The handheld will also indicate if any faults have been
detected.

Содержание EZ-TCU

Страница 1: ...tor facing down This way there is less chance of moisture getting into the TCU if it needs to be disconnected in wet conditions The TCU should not be mounted close to other electrically noisy components In particular keep good spacing try for 2 feet minimum from ignition components ignition boxes coils distributors etc If mounting in the engine compartment selecting a location towards the rear wil...

Страница 2: ...ound wires into these wires Failure to follow these requirements invites problems with electrical noise These kinds of problems are difficult to diagnose The wires may be extended if needed using automotive grade 16 gauge or larger wire 12V SWITCHED loose wire Connect this wire to a switched ignition source that is hot with the key in the On Run and Crank positions Do NOT connect to the positive s...

Страница 3: ...nal wire inside the harness Remote mount TPS kits are available from TCI to provide a TPS signal for carbureted applications TACH IN RPM MODULE The wire with the female terminal goes to the tach output from an ignition box or other RPM signal source Or to the EZ TCU RPM Module depending on the application See RPM Module notes Do NOT connect this directly to the ignition coil A second wire is provi...

Страница 4: ...und and when some very basic requirements are met this TCU input forces the torque converter clutch to lock up Otherwise the TCC will lock and unlock automatically based on user configurable settings FLASH ENABLE loose wire This wire is only used in the rare case that new firmware needs to be loaded into the TCU This wire would be grounded as the TCU is keyed on Be sure that this wire is not accid...

Страница 5: ... coil 2 Inductive coil Another RPM signal source is the negative side of the ignition coil in a traditional dwell controlled inductive ignition system One in which the coil is fed power on one side and is charged by grounding the other side either by points or some form of electronic module An HEI is one example of this type of ignition system To use this RPM signal option the RPM Module is requir...

Страница 6: ...ally work that way for a time But the TCU will be damaged and system performance will degrade Do NOT connect anything from the EZ TCU system to the coil RPM Module or TACH IN RPM MODULE wire when using an aftermarket ignition box Use resistor type spark plugs Non resistor plugs are very noisy and interfere with electronics including the EZ TCU system Do NOT use solid core spark plug wires These ar...

Страница 7: ...V SWITCHED wire to a switched ignition source hot in On Run and Crank Do NOT connect to the positive side of an ignition coil 8 If Manual Shifting will be used route the MANUAL SHIFTING connector into the cockpit and wire in an enable switch and a pair of buttons for upshift and downshift 9 To use the Forced TCC Lockup feature route the TCC APPLY wire into the cockpit and connect it to a switch or...

Страница 8: ...fore the handheld can be used as it powers back up To turn off the handheld disconnect the power cable either at the handheld itself or from the cigarette lighter receptacle Reconnect the power cable to restart the handheld If the handheld displays a COMM ERROR message make sure the handheld s communication cable is connected and that the TCU is powered on Then press the RESET button on the handhe...

Страница 9: ...Clutch This indicates that the torque converter clutch is locked It is normally controlled automatically by the TCU but can also be forced to lock by grounding the TCC APPLY wire PM Performance Mode This indicates that the ECONOMY PERFORMANCE wire has been grounded to select the more aggressive Performance Mode When this indicator is off the TCU operates in normal Economy Mode MM Manual Mode This ...

Страница 10: ... 3rd lever detent Drive L2 2nd lever detent 2nd L1 1st lever detent 1st Status Indicator Meaning BU Bump Up This indicates that an upshift is being requested by grounding the Bump Up wire in the MANUAL SHIFT connector Manual Shifting must be enabled for the Bump Up input to be recognized by the TCU and for this indicator to work BD Bump Down This indicates that a downshift is being requested by gr...

Страница 11: ... Speedometer Control Unit SCU will be used to drive a mechanical speedometer select 4000PPM OR SCU If you won t be using the EZ TCU s speedometer output it doesn t matter what setting is selected If you will be using the EZ TCU s speedometer output but you don t know what PPM your speedometer requires select the 4000PPM OR SCU option Later while driving this setting can be adjusted with the SPEEDO...

Страница 12: ... off by a large margin The speedometer would read quarter speed half speed double speed etc something pretty obvious If you don t know what input your speedometer is expecting try other PPM settings until the speedometer displays a reasonable speed Some aftermarket speedometers are programmable For those speedometers this setting may not be critical ADJUST SPEEDO This setting can be used to fine t...

Страница 13: ... NOT running TIRE SIZE Rear wheel tire diameter can be adjusted or re calculated here DIFF GEAR Rear axle gear ratio can be adjusted here MORE This brings up another page of Advanced Options MAX SHIFT RPM The highest RPM you want your engine to reach during wide open throttle shifting can be adjusted here LOWSPEED SHIFT This setting is used to adjust the vehicle speeds at which the transmission sh...

Страница 14: ...el Adjusting this setting will cause the TCU to call for more or less pressure But it is possible for the mechanical hydraulic components of the transmission to overpower the control the electronics can have on line pressure and shift feel 6X OVERLAP This setting is only used with a TCI 6x Six Speed transmission It affects shift characteristics when shifting between certain gears Consult with TCI ...

Страница 15: ...F FIRMNESS This setting determines how much shifts are firmed up when in Performance Mode A higher number means firmer shifts This adjustment is applied on top of whatever adjustment is already in place through the SHIFT FIRMNESS setting DONE This will take you back to the main menu Error Codes The EZ TCU system features a diagnostics feature The TCU constantly monitors various inputs for any devi...

Страница 16: ...er line pressure for firmer shifts The degree to which both are affected by enabling Performance Mode can be adjusted independently through the Advanced Options in the handheld This allows Performance Mode to be adjusted to suit the driver s preferences Manual Shifting Bump Up Bump Down By enabling Manual Shifting the transmission can be controlled with two buttons one for upshift one for downshif...

Страница 17: ...n the TCI 6x Six Speed transmission is operated with the shift lever in the L3 Drive position it uses 3 forward gears L2 Shift Lever Position In normal operation the TCU controls shifting and the transmission will upshift through the gears at the appropriate speeds up to the shift lever position For example it will upshift until it gets to 3rd gear when the shift lever is in the L3 Drive position ...

Страница 18: ...resistance Terminal numbers are molded into the main connector Terminals at Ohms at 70 F Component 4L60E 4L80E 6x TCU Trans 4L60E 4L80E 6x Shift Solenoid A 4 13 E A 20 30 Shift Solenoid B 4 14 E B 20 30 Force Motor 1 10 D C 3 5 8 0 TCC TCC 4 11 E S n a 10 15 10 15 TCC 4 20 E T 20 30 n a n a TCC PWM Sol C 4 15 E U 10 15 n a 20 30 Transmission Retrofit Details The mechanical portion of this transmis...

Страница 19: ...red to accept either a Chevy or BOP engine BOP Buick Olds Pontiac Cadillac Both the 4L60E 4L65E and 4L80E 4L85E have Chevy bellhousing bolt patterns TCI has a full line of adapters to allow these transmissions to be bolted up to Buick Olds Pontiac engines as well as popular engines from Ford and Chrysler as well Additional 4L60E 4L65E Notes Header Exhaust Clearance There are several different bell...

Страница 20: ... longer than the early style found on 700R4 TH350 and TH400 Cooler Lines Your existing lines may have to be bent to connect to a 1996 later two piece case transmission These units have fittings that are parallel to the ground instead of being angled down You may also need to change the case fittings as many 1996 later transmissions are equipped with the factory quick connect style NOTE Do not use ...

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