1237 / 1428
FUEL SYSTEM
6
Technical specifications of Cylinder valve:
Maximum working pressure:
260 bar
Working temperature:
- 40 to 85 deg.cen
Solenoid valve voltage:
12V DC
Nominal power rating of solenoid valve:
10W
Working Principle of Solenoid valve / coil:
The Tank solenoid valve is an integrated on the CNG
tank unit and turns ON/OFF the CNG output from the
tank. The valve is “normally closed” and is controlled
by the ECU to control the high pressure gas output
from the tank.
System Integration:
Tank solenoid Valve has an electrical interface with
the ECU and the ‘Change over Switch’ (COS). The
tank solenoid (shut-off) valve is controlled by the
ECU.
Stand Alone Diagnosis:
Use Multimeter:
Coil resistance @ 20°C= 9.7 ± 0.3kΩ.
Use TATA Diagnostic Tool, perform actuator
test.
Sensor end Pin assignment (on connector):
1: -ve (12V Supply from power relay)
2: +ve (ECU pin)
1
2
CAUTION:
The Information given above is just for reference
only and the repair or service of the above
component should be done at Authorized CNG
service stations only.
WIRING DETAILS (ECU & SOLENOID COIL)
REMOVAL OF CYLINDER VALVE FROM CNG
CYLINDER: (On-bench process)
Do not remove CNG cylinder valve unless CNG
cylinder is empty.
Hold the cylinder in a suitable fixture.
Remove the cylinder valve from the cylinder
using a torque wrench & tightening tool (Part No:
5402 5890 47 01).
REFITMENT OF CYLINDER VALVE ON CNG
CYLINDER:
Remove the thread protection cap from the
“cylinder valve” (for new assembly).
Remove the thread protection cap from the
“cylinder neck” (for new assembly) and ensure
that the threads are free from burrs and any
irregularities.
Remove the rubber gasket from the valve
thread (for new assembly).
NOTE:
Follow the guidelines for NPT threading for
assembly.