NANO

1359 / 1904

FUEL SYSTEM
20
Wiring details (ECU & Sensor):
Stand Alone Diagnosis: (At NTP conditions)
By using Multimeter:
Output voltage (between pin 1 & 2):
 Approx 0.5 VDC at 1 bar G
 Approx 3.6 VDC at 200 bar G
Use TATA Diagnostic Tool & perform actuator test.
REMOVAL OF H.P SENSOR FROM PRESSURE
REGULATOR (On vehicle):
NOTE
 Park the vehicle with brakes ON and duel
selector switch is kept in CNG mode.
 Manually turn of the tank valve and connect
the TML tester tool and start the service
“Empty CNG lines”
 Crank the engine and run in idle condition
until engine stop at its own.
 Re crank the engine it should not start (tank
pressure should be 0 bar)
WARNING :
Do not turn OFF Cylinder Valves , in vehicle
running in CNG mode. This may wrongly detect
the leakage error.
 Disconnect. Battery negative cable.
 Disconnect Solenoid valve connection.
 Disconnect electrical connection of HP sensor
 Remove the HP sensor by using 27 metric.
Wrench.
RE-FITMENT OF H.P SENSOR ON PRESSURE
REGULATOR (On vehicle):
 Before installing the sensor, always ensure
good condition of the “O” ring.
 Refit the H.P sensor on pressure regulator.
 Tighten the H.P sensor to a torque of 50 + 5 Nm
(Note: Apply torque only at the hexagonal area).
 Do a leak check after fitment.