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 P1100 is present?
Is P1100 present?
Intermittent problem exists
Refer the intermittent problem
inspection procedure
STEP 2
Is the continuity
exists?
Ignition OFF
HFM sensor wiring harness
connector (C19) DISCONNECTED
Check the continuity between
pin 5 and pin 1 of the HFM
sensor wiring harness
connector
STEP 3
STEP 4
Ignition OFF
HFM sensor wiring harness
connector (C19) DISCONNECTED
EMS ECU wiring harness
connector (C4) DISCONNECTED
Check the continuity between
between pin 5 of the HFM
sensor wiring harness
connector and pin 31 of the EMS
ECU wiring harness connector
Is the continuity
exists?
Examine the open circuit of
HFM sensor air mass signal wire
Replace the wiring harness
Clear the DTC and verify
Examine the short circuit of
HFM sensor air mass signal wire
to ground
Replace the wiring harness
Clear the DTC and verify
Ignition OFF
HFM sensor wiring harness
connector (C19) DISCONNECTED
EMS ECU wiring harness
connector (C4) DISCONNECTED
Check the continuity between
between pin 1 of the HFM
sensor wiring harness
connector and pin 53 of the EMS
ECU wiring harness connector
Is the continuity
exists?
Examine the open circuit of
HFM sensor ground wire
Replace the wiring harness
Clear the DTC and verify
Suspect internal failure of HFM
sensor
Replace the HFM sensor with a
new one
Clear the DTC and verify
NO
NO
NO
YES
YES
YES
YES
NO
P 1100
34