Impco HHI, Руководство по обслуживанию

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174
DTC 123-TPS 1 Signal Voltage High
M o to r
8 0
8 2
4 7
2 0
4 8
1 9
T P S 1
T P S 2
D B W +
D B W -
T P S 1 S ig n a l
S e n s o r G ro u n d
T P S 2 S ig n a l
5 V o lts
E C M
L
B r
Y
G r
W
R /W
E le c tro n ic T h ro ttle
3
5
2
6
1
4
1 8 0
1 8 2
1 4 7
1 2 0
1 4 8
1 1 9
C irc u it
#
W ire
C o lo r
Conditions for Setting the DTC

Throttle Position Sensor 1

Check Condition-Cranking or Running

Fault Condition-TPS sensor voltage exceeds 4.800 volts

MIL-On during active fault

Engine shutdown
Circuit Description
Dual throttle Position Sensors are used within the throttle that use variable resistors to deter-
mine signal voltage based on throttle plate position. TPS1 will read lower voltage when closed
and TPS2 will read higher voltage when closed. The TPS1 and TPS2 percentages are calcu-
lated from these voltages. Although the voltages are different, the calculated values for the
throttle position percentages should be very close to the same. The TPS values are used by
the ECM to determine if the throttle is opening as commanded. The TPS is not serviceable
and in the event of a failure the electronic throttle assembly must be replaced. This fault will
set if the TPS 1 voltage exceeds 4.800 volts. The MIL command is ON and the engine will shut
down.