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Q501 4 Cylinder MT Application
DTC Troubleshooting Data
Version: 0.1
Date: 21-Sep-2018
Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta
Checked By: Yogesh Jadhav
Approved By: Satish Kumar P
Page: 41 of 1052
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.
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 Step 3.
Fill in the AC gas.
3.
Is there any rust/oxidization observed on Sensor Terminals.
Clean the Rust or
repair or replace.
Go to Step 4.
4.
Is there wiring harness electrical continuity between ECU
pins 43, 44, 48 & 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 43 short circuited to GND/Battery?
Repair the harness
as per the
schematic.
Go to Step 8.
8.
Is sensor signal Pin 44, Short circuited to Battery/ ground?
Repair the harness
as per the
schematic.
Go to Step 9.
9.
Is sensor physically Damaged?
Replace Sensor.
Go to Step 10.
10.
If fault still persists.
then replace sensor
and if fault still
persists then call
Hotline.
Follow the above
procedure again for
Reconfirmation.
DTC’s confirmation
(checks before handing over vehicle to customer)
:
1. Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds also.
2. If error present, then rectify the errors.
3. Confirm that there is no error logged in EMS before handing over vehicle to customer.
Circuit Schematic: