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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: 422 of 654
Copyright ©
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.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Is there any rust/oxidization observed on Sensor Terminals Clean the Rust or
repair or replace
Go to Step 2
2.
Is there wiring harness electrical continuity between ECU
pins 71, 58 & fuel temperature Sensor connector pins 1
and 2
Go to Step 3
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
3
Are there any pins damaged at Sensor/EMS ECU Connector
Replace the
connector or wiring
harness
Go to step 4
4
Are there any pins backed out from the Sensor/EMS ECU
Connector
Rectify/Replace
Connectors
Go to Step 5
5
Is fuel temperature sensor signal pin 71, Short circuited to
GND/Battery.
Repair the harness
as per the schematic Go to Step 6
6
Is Sensor Signal Pin71 open circuited?
Repair the harness
as per the schematic Go to Step 7
7
Is sensor physically Damaged
Replace Sensor
Go to Step 8
8
Fault Still Persists?
Replace Sensor and
then Fault still
persists then
Replace EMS ECU
Follow the steps
again for
reconfirmation
DTC’s confirmation (checks before handing over vehicle to customer):
After rectification ensure the following before handing over to customer.
x
Soak the vehicle for 8 hours and check whether the coolant temperature, Fuel temperature & Inlet air temperature
are approximately same by monitoring corresponding parameters in diagnostic tool.
x
Ensure that no faults are logged by EMS before handing over the vehicle to customer.