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1.2L REVOTRON ENGINE
160
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.
Stagnant humidity and water standing directly
on the sealing area (“bath tub”) between cover
and bottom part or respectively the connector
is not permissible. That means the defined
mounting angles of the offer drawing must be
considered.
Formation of electro-chemical corrosion
created by the use and connection of different
metals within the installation of the control
device is to be avoided.
Following combination of materials are not
acceptable: Steel – Brass - PBT = stress
corrosion cracking (appearance of base at
NaCl load).
The first fixation point of the wiring harness
must be in a distance - 150 mm from the cable
outlet and on the same vibration level as the
ECU.
Relative motion between the wiring harness
and the ECU has to be minimized.
It has to be assured that no water can infiltrate
through the wiring harness into the connector
or the ECU respectively. This can be achieved
by using a Siphon or a breathing hole.
If the Electronic Control Module is coated, it
must be ensured, that the Pressure
Compensation Element (PCE), the connector
and the label are free of coating.
The mounting position of the ECU has to be in
a distance which is large enough from a heat
source to avoid any influence of heat transfer
to the ECU.
The mounting place of the ECU should be
chosen to gain low humidity and corrosion
loads. Permanent water spraying based on
splash water must be avoided by appropriate
protections.
The impact of chemicals (e.g. oils, diesel, and
gasoline, detergents for cleaning, brake fluid,
battery acid, and so on) should be low.