Short Circuit To Battery Error On Power Stage For The Compressor - Mahindra Quanto Ems Diagnostic Manual

DIAGNOSTIC MANUAL
QUANTO
P06A2

SHORT CIRCUIT TO BATTERY ERROR ON POWER STAGE FOR THE COMPRESSOR

AC COMPRESSOR POWER STAGE
The AC Compressor is controlled by the EMS ECU under the feedback of the temperature sensing
unit in the HVAC system and pressure sensors measuring the pressure of the refrigerant flow in
the air conditioning circuit. The ECU monitors the status of the Power Stage (Actuator) of the
Compressor Clutch for monitoring hardware errors such as short circuit to battery, Short circuit
to ground and Open load
NORMAL OPERATION

Ignition ON

EMS ECU switches ON the compressor once it recieves AC
switch ON signal thru thermoamplifier via high low
pressure switch

No malfunction detected by EMS ECU in the AC compressor
power circuit
DTC DETECTING CONDITIONS

Ignition ON

EMS ECU supply voltage 8-16V

Short to battery is detected in AC compressor relay control
circuit
DTC REACTIONS

AC Compressor Shuts OFF
HEALING CONDITION

Ignition Off/On
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 or whole of the present document,
are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of Mahindra & Mahindra Ltd.,
will amount to unauthorized use and shall be liable for penalty/prosecution© 2012 Mahindra & Mahindra Ltd.
EMS
.
DTC INFORMATION
MAN-00201
SEP 2012/Rev 1
PROBABLE CAUSES OF FAILURE

Short to battery in AC
compressor relay
control wire

Faulty AC compressor
relay

Faulty EMS ECU
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