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Bosch Motorsport Engine_Control_Unit_MS_6.x_Manual 43/76
E_APS Detected error messages of acceleration
pedal functionality. If errors are detected,
the ETC functionality will become inactive.
Verification of throttle position signals:
The mathematic value of voltage throttle signal 1 + voltage throttle signal 2 - 5 V has to
be below value of “UDTHRCM_MAX” (recommended 0.2 V)
The signal sequences of a throttle position sensor:
Throttle position main data labels:
CWTHR Codeword for type of throttle controls:
0 = mechanical throttle
1 = mechanical throttle with backup poten-
tiometer
2 = electric throttle single bank
3 = electric throttle dual bank
Throttle position signals:
UDTHR_MIN, UDTHR_MAX Minimum and maximum accepted sensor
voltage. When violated, an error is set (E_thr
= 1). Set to approx. 200 mV/4800 mV Check
if the uthrottle(xx) outputs are changing
when throttles are moved
uthrottle 2 sensor output values and their redundant
uthrottle_b signals (_b). The system expect a rising up
uthrottle2 voltage for the main signals and a falling
signal
uthrottle2_b for the redundant one.
UDTHRCM_MAX max. allowed difference between sensor
output and redundant signal
abs (uthrottle(x)+uthrottle(x)_b)-5V < UD-
THRCM_MAX
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