Diagnostic Manual ( EMS)
LCV MDI BSIII CRDe
Rev 01- Mar 14
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The repair methods given by the manufacturer in this document are based on the technical specifications current at the time of release.
The methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units
and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of whole of the present
document, are prohibited without the prior written consent of 2014 Mahindra & Mahindra Ltd (Truck & Bus Division)
Accelerator Pedal Module
Description:
The Accelerator pedal module (APM) is directly connected to the Accelerator pedal.
It is connected to the ECU by wires. The APM sensor is a variable resistor
(potentiometer) whose resistance changes according to the pedal position. ECU
applies a reference voltage to the APM sensor and then measures the voltage that
is present on the APM sensor signal circuit. The ECU uses the APM sensor signal for
further calculation of fuelling & other engine operational parameters.
.DTC
Diagnostic item
P0122
P0123
P2135
P1120
Signal range check for APP1 below minimum limit
Signal range check for APP1 above maximum limit
Plausibility with APP2 violated
Pedal sensor fault(electrical,track1)
DTC detection condition
Probable cause
Normal Operation:
•
The Accelerator pedal module (APM) outputs
a voltage, which is proportional to the
Position of accelerator pedal.
•
The ECU checks whether the voltage output
by the Accelerator pedal module is within a
specified range.
Proper Performance
•
Sensor output voltage has continued to
between 0 to 5V, varying accelerator pedal
position.
Malfunction; out-of-range
•
With the changing Accelerator pedal position,
the sensor output voltage has continued to be
5V or 0V.
Reaction:
•
The engine speed not varying with changing
accelerator pedal position. (Constant 1300
rpm)
•
In addition to that if the P0123 is registered
then in that drive cycle the vehicle will go into
limp home. But in the next drive cycle the
engine cannot be started.
•
Open or shorted
Accelerator pedal
module circuits,
loose or wrongs
connections.
•
Accelerator pedal
module failed
P0122
P0123
P2135
P1120
Summary of Contents for Cosmo
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