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ENGINE 273 MPFI
SENSORANDACTUATOR TESTING
No. Sensor
Parameter Measured
Across
Nominal values Additional Checks
Condition
1 Coolant
Temp.
Thermistor
Resistance
At 25 º C 1.954 K Ohm -
2.160 K Ohm
2 Thermostat
Sensor
Thermistor
Resistance
Pin 1 & 2 At 20 º C 2.375 K Ohm -
2.675 K Ohm
3 Crank Shaft
Position
Sensor
Coil
Resistance
Pin 1 & 2 At 20 º C 801 - 979 Ohm
Inductance Pin 1 & 2
310 mH - 430 mH
(1Khz,Series
Circuit)
4 Throttle
Position
Sensor
Resistance Pin 1 & 3
790 Ohm - 1500
Ohm @ Fully
Closed Throttle
Position (Idle)
2230 Ohm - 3660
Ohms @ Fully
Open Throttle
Position
1360 Ohm - 2400
Ohms (Constant)
2230 Ohm - 3660
Ohms @ Fully
Closed Throttle
Position
The circuit should not be open
(High value of resistance)
Pin 2 & 3
Pin 1 & 2
5 Lambda
Sensor
Heater
Resistance
Pin 1 & 2 At room
temp.
9 Ohm
6 Fuel Injector
Resistance Pin 1 & 2
13.775 Ohnm -
15.225 Ohm
7
Resistance
14 Ohm - 18 Ohm
Leakage -
Significant
leakage can be detected
through sucking on the
cover side with mouth. Any
leakage can be felt with the
finger tip on the opposite
port.
Switching -
Power the
valve couple times with 12-
14 Volts and listen to the
switching noise.
8
Winding
Resistance
Pin 1 and 2
(Primary)
High Voltage
Terminals
(Secondary)
370 m Ohm -
430 m Ohm
Pin 1 & 2
O/P of TPS at Throttle Idle
Position =
0.3V - 0.6V
O/P of TPS at ThrottleWOT
Position =
4.3V - 4.7V (as
per the Diagnostic tool)
2.7V - 3.0V (measured
with the Voltmeter
between pimns 1 & 3)
Canister
Purge Valve
Ignition Coil
At 20 º C
At 20 º C
The circuit should not be open
(High value of resistance)
790 Ohm - 1500
Ohm@ Fully Open
Throttle Position
(Idle)
Nominal O/P voltage ratio
from stop to stop should be
0.05 (Fully Closed
Throttle/Idle) <= UA/UV
<= 0.95 (Fully Open
Throttle)
where UA= O/P
Voltage, UV= Supply
Voltage = 3.3V
Pin 1 and 2
At room
temp.
5.2 K Ohm - 6.2 K
Ohm