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TCS Troubleshooting List of Categories
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- Why does my transmission shift at a higher RPM than I programmed it to at full throttle?
- Your installation manual mentions checking the resistance of the converter clutch solenoid for the AODE, is this check necessary for the E4OD?
- Why does eL or eH display in the range or fluid temperature window of the system monitor?
- Why does my TCS shift very hard at light throttle, and shift correctly at other throttle positions?
- Why doesn’t my torque converter clutch engage until after I have driven for a few miles?
- Why does my torque converter not engage at all?
- The green light on my TCS doesn’t come on in any gear range, but I get a red light in manual 2nd, what could cause this?
- Why doesn’t the transmission range indicator on the system monitor change when I press the OD cancel switch?
- Why does current gear read 1 in Park, Reverse, and Neutral?
- Why does my transmission equipped with the TCS shift in manual low?
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Why does my transmission shift at a higher RPM than I programmed it to at full throttle?
The electronics in the TCS react instantly, but the hydraulics have some delay. Once a shift solenoid is switched the passage that it controls must either fill or drain. The time it takes to fill or drain the passage is what accounts for this lag between the programmed shift point and the actual full throttle shift point. Converter slip also factors into this difference in programmed and actual shift points. The difference is usually around 500 RPMs, so plan to subtract about 500 RPMs from your programmed WOT shift point.
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Your installation manual mentions checking the resistance of the converter clutch solenoid for the AODE, is this check necessary for the E4OD?
It is not necessary to test the converter clutch solenoid on an E4OD. There is only one type of converter solenoid for the E4OD.
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Why does eL or eH display in the range or fluid temperature window of the system monitor?
These are error indicators, eL means the voltage is lower than any acceptable reading, and eH means the voltage is higher than any acceptable reading. This is most likely a wiring or sensor related problem.
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Why does my TCS shift very hard at light throttle, and shift correctly at other throttle positions?
If this happens it is likely an incorrectly programmed base TPS value. Base TPS for the TCS is NOT the idle TPS value. The correct base TPS is .12 volts below idle. The TCS uses this value to determine if there is a problem with the TPS. If TPS voltage falls below the base TPS voltage, then the TCS will enter a default operation mode where line pressure is always full, and all shift decisions are made at cell five. For questions on adjusting base TPS setting see TCS tuning Tips.
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Why doesn’t my torque converter clutch engage until after I have driven for a few miles?
The torque converter clutch will not come on until the transmission fluid temperature has reached 100 degrees F. This is done to protect the lining of the converter clutch, which can be damaged by engaging when the fluid is cold.
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Why does my torque converter not engage at all?
Check to make sure you have a temperature reading in the systems monitor display at the bottom of the TCS tuning software window. If the display reads eL or eH then you have an error condition that could be caused by wiring problems or a bad transmission fluid temperature (TFT) sensor. Since the minimum temperature for the converter clutch to turn on cannot be verified by the TCS the clutch will not operate.
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The green light on my TCS doesn’t come on in any gear range, but I get a red light in manual 2nd, what could cause this?
This condition usually indicates an open shift solenoid two connection. The transmission harness has two wires that are purple with an orange stripe. One of these wires is shift solenoid two, and the other is backup light power. Insure that you have the correct wire connected to each.
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Why doesn’t the transmission range indicator on the system monitor change when I press the OD cancel switch?
The range display simply indicates the physical position of the shifter. The OD cancel switch tells the processor not to shift into OD, but since the shifter is still in the OD range the display will still read OD.
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Why does current gear read 1 in Park, Reverse, and Neutral?
The TCS does not schedule shifts in Park, Reverse, or Neutral; therefore it always defaults to first gear in these cases. This minimizes the delay when initially shifting into the OD range.
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Why does my transmission equipped with the TCS shift in manual low?
This is completely normal. The TCS has a programmable upshift and downshift safety for manual low. It is available in the Options, System Setup menu in the lower left-hand corner of the window. For more information see TCS tuning tips.
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Baumann Electronic Controls, LLC
207 Mistr Lane
Pickens, SC 29671
Phone: 864-335-9365
Fax: 864-335-9055
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