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1.2L REVOTRON ENGINE
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ECU Block Diagram :
ECU Handling and Care :
Earth (Ground) Connection:
1. Ensure all the ground connections are fixed
correctly.
2. DO NOT leave any grounded wire loose or
open.
3. ECU ground pins should be grounded
within 300mm from the ECU.
Power Supply:
At IGNITION ON, ECU starts functioning and
initializes, the power for the main drivers for the
ECU are taken from the MAIN RELAY power
supply. The MAIN RELAY output stage gives 12
volts when ECU grounds the MAIN RELAY at
IGNITION ON. After IGNITION OFF the ECU
holds the MAIN RELAY GROUND for some
duration known as the POWER LATCH period so
that the vital functionalities are powered ON for
that duration.
PRECAUTION
Do not disconnect the connector of the
ECU for at least 1 minute after IGNITION
OFF. Never disconnect the connector of
the ECU during IGNITION ON.
Ensure that ignition switch is in OFF
position while plugging - in the connector to
the ECU.
Input:
Ensure that the Input signal line is as far as
possible away from noise sources such as
High Tension Cable, Horn relay, Motor etc.
Ensure that sealed wire are used for input
line of lambda oxygen Sensor, Crank Angle
Sensor and the wiring is as far as possible
from the noise sources similar to the ones
above. Sensor ground connections should
not be shorted to 12 volts supply.
Output:
Take care to avoid dead-short (solenoid
short-circuit etc.) and similar circuit
misconnection while checking (to avoid any
damage). Use a solenoid which does not use
a fly - back diode (reverse polarity may
damage the Output Power Transistor).
Mounting / Installation Guidelines :
While mounting to the fixation the ECU
must be fixed without deformations. As an
ideal solution, a connection with minimum
3 screws, screwed on a plan surface, is to
be considered.
Bouncing of the fixed ECU between ECU
and fixation underground is not
permissible.