DIAGNOSTIC MANUAL MAN-00201
QUANTO
EMS
SEP 2012/Rev 1
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.
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STEP 1
Connect the smart tester
Turn the ignition ON
Initialise the diagnostic tool
Record the DTC and clear
Turn ignition OFF
Turn ignition ON
Verify if P0504 is present?
Is P0504 present?
Intermittent problem exists
Refer the intermittent problem
inspection procedure
STEP 2
STEP 3
Ignition OFF
Ensure that the brake switch is
adjusted properly (refer repair
manual for procedure)
Ensure proper functioning of
15A fuse (F44) in engine
compartment fuse box
Brake switch wiring harness
connector(C112) DISCONNECTED
Ignition ON
Check the voltage between pin
3 of the brake switch wiring
harness connector and battery
ground
Check the voltage between pin
1 of the brake switch wiring
harness connector and battery
ground
Is the value =Vbat?
Examine the open /short circuit
in brake switch power supply
wire
Replace the wiring harness
Clear the DTC and verify
Ignition OFF
EMS ECU wiring harness
connector (C4) DISCONNECTED
Brake switch wiring harness
connector(C112) DISCONNECTED
Check the continuity between
pin 4 of the brake switch wiring
harness connector and pin 24 of
the EMS ECU wiring harness
connector
Check the continuity between
pin 2 of the brake switch wiring
harness connector and pin 80 of
the EMS ECU wiring harness
connector
Is the continuity
exists?
Examine the open circuit in
brake switch signal wires to EMS
ECU
Replace the wiring harness
Clear the DTC and verify
Go to STEP 4
NO
NO
NO
YES
YES
YES
P 0504
267