Repair Manual MAN-00190
THAR CRDe BS-IV MAY 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.
Self diagnosis of ECU:
ECU detects transfer case system malfunctions and indicates malfunctioning part(s) through flashing
indicator lights. The operator will be alerted of fault condition by continuous illumination of both 4WD
HI and 4WD LO lights on dashboard when ignition is on.
A service connector is provided to indicate the fault codes in binary. Connect one end to the pin whole
number 9 in ECU connector, and other end to the ignition switch. The flashing of indicator light will
show the defective code (as illustrated in the table). Identify the malfunctioning part and replace it.
L1 L2 L3 Binary
Code
Decimal
Equivalent
Fault With
Off Off On 001 1 ECU Module
Off On Off 010 2 Shifter Motor
Off On On 011 3 Synchronizer Clutch
On Off Off 100 4 Speed Sensor
On On Off 110 6 Selector Switch
On On On 111 7 Motor Position Switch
Before replacing the malfunctioning parts with defective codes, check the wires and connectors for
proper condition. Use only 12v 3
‐wa
tt bulb for diagnostic purpose.
If o
nly one part is malfunctioning, the indicator light will display defective code three times
continuously. If more than two parts are malfunctioning, the first malfunctioning part will be displayed
three times and then the other malfunctioning parts will be displayed.
After repair clear the fault stored in the memory. Ground the service connector and keep ignition 'On'
for five seconds continuously to erase defective code.
Connect a service connector as described earlier. Turn the ignition switch On. 4WD CHECK indicator
will turn on for 0.6 seconds and turn Off for 3 seconds. Then it will display a defective code 3 times
continuously.
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