Vehicle Test; Throttle Position Signals; Calibration - Bosch MS 6 Manual

Engine control unit
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4 | Prepare Data Base
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Throttle position signals:

UDTHR_MIN, UDTHR_MAX
uthrottle
uthrottle_b
uthrottle2
uthrottle2_b
UDTHRCM_MAX

Calibration:

CWTHRADJ
Manual Procedure:
▪ Close throttle and set CWTHRADJ to 1
▪ Open throttle fully and set CWTHRADJ to 2
▪ Adjust the throttle to idle point.
▪ Do not forget to set CWTHRADJ back to 0. Check calibration by moving
throttle
4.4

Vehicle Test

Before starting with your vehicle test, some initial data should be set:
Minimum and maximum accepted sen‐
sor voltage. When violated, an error is
set (E_thr = 1). Set to approx. 200 mV/
4800 mV Check if the uthrottle(xx) out‐
puts are changing when throttles are
moved
2 sensor output values and their redun‐
dant
signals (_b). The system expect a rising
up
voltage for the main signals and a fall‐
ing signal
for the redundant one.
max. allowed difference between sen‐
sor output and redundant signal
abs (uthrottle(x)+uthrottle(x)_b)‐5V <
UDTHRCM_MAX
Codeword for throttle adjust
1 = automatical calibration process
2 = calibrate lower mechanical stop
3 = calibrate upper mechanical stop
4 = calibrate limp home position
ECU MS 6
Bosch Motorsport

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