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Diagnostic Manual
MAXXIMO MINIVAN
Sl No
DTC
1
P121B
2
P121A
NORMAL OPERATION
Engine starts properly while cranking
DTC Detecting Condition
No power supply or power supply comes too early or too
late to ECU
LAMP STATUS
Engine check lamp OFF
FAULT REACTION
Engine will not start
Smart tester will not get activated
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Mahindra Ltd.
VX
ECU MAIN RELAY
Description
Main relay opens too early
Main relay sticky/ does not open in time
MAN-00183
June 2012
Probable Causes
Harness or Connectors
ECU relay fuse blown
ECU relay is not working
Rev
/
1
133
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