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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: 124 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.
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 72,59 & Coolant Temperature Sensor connector pins
1,2.
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 Sensor Signal Pin 72 Short circuited to VBatt?
Repair the harness
as per the schematic Go to Step 6
6
Is sensor physically Damaged
Replace Sensor
Go to Step 7
7
Check the resistance between the pins 72 & 59. Compare
this resistance value with the Sensor Temperature
–
Resistance characteristics and check whether the
Temperature corresponding to the Resistance value found
is matching the Engine Parameter displayed on tool
–
Coolant Temperature.
Go to Step 8
Replace sensor
8
Fault Still Persists?
Replace Sensor and
then Fault still
persists then Call
Hot Line
Follow the steps
again for
reconfirmation
DTC’s confirmation:
After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing
over to customer.
Method A:
Soak the vehicle for more than 12 hrs (preferably overnight)
Then check if all the system temperature values (coolant, fuel, inlet air) are close to each other.
Method B:
Check the resistance between the pins 72 & 59. Compare this resistance value with the Sensor Temperature
–
Resistance characteristics and check whether the Temperature corresponding to the Resistance value found is matching
the Engine Parameter displayed on tool
–
Coolant Temperature.