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OSPREY- Application
DTC Troubleshooting Data
Version: 4.0
Date: 10-02-2017
Prepared by: Mithipati Prasad
Checked by: G S Raju / Senthilnathan S
Page: 9 of 654
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TATA MOTORS Ltd.
This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
P0002: Fuel Volume Regulator Control (IMV) Circuit Range/Performance
Overview:
DTC Description as per ISO standard
Fuel Volume regulator control (IMV) circuit range/performance.
ECU Pin Number
11
Customer Symptom
Vehicle may not start, if started then drivability may get affected
Fault Effects (On Vehicle)
Vehicle may not start, if started then drivability may get affected
Lamp Status
Check Engine Lamp ON
Fault Detection Condition (Root cause)
This fault gets logged when IMV is not able to control rail pressure
& the IMV resistance trims are not falling in Calibrated thresholds.
Normal Operating Condition
No IMV related faults
Probable Trouble Area
IMV, ECU, Wiring harness, High Pressure fuel circuit (from fuel tank
to HP pump to common rail).
Healing Condition
Clear the errors, Ignition OFF to ON, engine idle & fly-up condition.
Component Details:
The Inlet Metering Valve controls rail pressure by regulating the amount of fuel sent to the pumping components of the HP
pump. This actuator has a double role as follows:
First it improves injection system output since the HP pump only compresses the amount of fuel needed to maintain the
rail pressure required by the system.
Secondly it reduces the temperature in the fuel tank as HP pump will be fed with the required amount of fuel for Engine
needs.
In fact, when excess fuel is sent to the return circuit, the expansion of the fluid (from rail pressure to atmospheric
pressure) involves a large amount of heat. This generates an increase in temperature of the fuel sent back to the tank.
Preliminary Checks
x
Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If
yes, go ahead with next steps. If
not, check for other DTC’s presence.
x
Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure.
x
Check the Fuel lines between the Fuel Tank to the IMV to HP pump to Common rail for any leakages / blockings.
x
Ensure IMV connector is properly connected to the IMV.
x
There is no mud, dirt, foreign particle accumulation on the connector.
x
Check for any EMS ecu pin damages / Pin back out.
x
Check for EMS ecu connector damages.