Volvo D13 Manual De Usuario

PA1561 

46 

 

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).  The TPS varies in 
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 specifications. It is 
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. 

03035

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, 

the CPC will signal diagnostic codes of 21-12 for 
idle error and 21-23 for wide-open throttle error.