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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: 580 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
AC pipes got damaged? Causing any leaks of AC
refrigerant?
Rectify / Replace the
Air inlet circuit
Go to Step 2
2
AC gas filled in?
Go to next step
Fill in the AC gas
3
Is there any rust/oxidization observed on Sensor Terminals Clean the Rust or
repair or replace
Go to next step
4.
Is there wiring harness electrical continuity between ECU
pins 75, 56,20 & AC pressure Sensor connector pins 1, 2, 3. Go to Step 5
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
5
Are there any pins damaged at Sensor/EMS ECU Connector
Replace the
connector or wiring
harness
Go to step 6
6
Are there any pins backed out from the Sensor/EMS ECU
Connector
Rectify/Replace
Connectors
Go to Step 7
7
Is Sensor Supply pin 75, Short circuited to GND/Battery.
Repair the harness
as per the schematic Go to Step 8
8
Is Sensor Signal Pin 56, Short circuited to GND/Battery.
Repair the harness
as per the schematic Go to Step 9
9
Is sensor physically Damaged
Replace Sensor
Go to Step 10
10
Fault Still Persists?
Call Hotline.
Follow the steps
again for
reconfirmation
DTC’s confirmation:
After rectification, ensure the following points before handing over to customer.
x
Measure the AC refrigerant pressure, AC refrigerant pressure shall be in the range of 2 to 30 bar.
x
Ensure that no faults are logged in EMS before handing over vehicle back to customer