B&M 120001 SHIFT PLUS 2 TRANS CONTROLLER - Manual (Page 13)

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Error Codes:
The Shift Plus 2 system features a diagnostics feature. The TCU constantly monitors various inputs for any devia-
tions from normal operation. If any is detected, the LED on the front face of the TCU flashes rapidly as a warning that
there is a problem (the LED is lit solid when the TCU is powered on and working normally or it will flash a slower on/
off pattern if the TCU started up in Flash Mode). Also, the SE Status Indicator displayed on the Live Data screen
acts like a Check Engine Light. It will signal if an error code has been set. The handheld can be used to read any
error codes that have been set.
Once an error code is set, it is saved in the TCU until the TCU is reset by keying-off and allowing the TCU to com-
plete its shutdown procedure (takes approximately 5-10 seconds) Error codes can be cleared with the handheld at
any time.
The picture on the left is showing error codes. After clearing them, the picture on the right shows what the Shift Plus
2 Codes screen normally looks like.
The following error codes are possible:
Fault Monitors
TOT Transmission oil temperature sensor open or shorted. The sensor is inside the transmission.
OVER TEMP Transmission oil temperature has gone over 262°F.
TPS
BATT Battery voltage below 7V or above 19V for 10 seconds.
PSWM
If the TCU is completely disabled – power is lost, harness is cut, etc. – the transmission can still be driven with
limited functionality. Line pressure will be maxed out. The reverse gear will work. The transmission will default to 3
rd
gear with the shift lever in Overdrive or L3/Drive. 2 nd gear can be selected by moving the shift lever into the L2 posi-
tion.
Throttle position sensor signal voltage above or below approximately 4.9V or 0.1V respec-
tively.
Invalid pattern from pressure switch manifold (internal transmission sensor that
tells TCU what gear is selected.)