Electronic Foot Pedal Assembly (Efpa) & Throttle Position Sensor; Figure 24: Electronic Foot Pedal Assembly - Volvo D13 User Manual

Section 01: ENGINE
3. ELECTRONIC FOOT PEDAL ASSEMBLY
(EFPA) & THROTTLE POSITION SENSOR
The Electronic Foot Pedal Assembly (EFPA)
connects the accelerator pedal to a Throttle
Position Sensor (TPS). The (TPS) is a device,
which sends an electrical signal to the Motor
Control Module (MCM).
voltage depending on how far the pedal is
depressed. The system is installed in the space
normally occupied by a mechanical foot pedal.
The (EFPA) has maximum and minimum stops
that are built into the unit during manufacturing
(Fig. 24). The (TPS) converts the operator's foot
pedal input into a signal for the MCM.
When installed by the equipment manufacturer,
the TPS should not require adjustment. If the
TPS is suspected of being misadjusted, confirm
that the sensor is installed in accordance with
the manufacturer's
recommended that the idle count be at 50 or
higher with a full throttle count of up to 200.
The TPS is self-calibrating and therefore has no
optimum closed throttle or wide open throttle
count value. If the counts are within the 50 to
200 range, the sensor is properly set.

FIGURE 24: ELECTRONIC FOOT PEDAL ASSEMBLY

Monitor the (TPS) at the controls as you move it
through its full stroke. Be sure there is no
misalignment or obstruction preventing the
smooth movement of the TPS through the full
stroke. Using a diagnostic data reader, check
that the idle and full throttle position counts do
not fall within the error zones. The error zones
occur when the idle position is less than 14
counts, or when the full throttle position is more
than 233 counts. Should these conditions occur,
PA1561
The TPS varies in
specifications. It is
03035
the CPC will signal diagnostic codes of 21-12 for
idle error and 21-23 for wide-open throttle error.
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