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{Osprey CCM}
DTC Troubleshooting Data
Version: 2.0
Date: 28-Jul-17
Author: ERC
Page: 60 of 244
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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.
DTC’s confirmation:-
After rectification, Rotate Fan Knob from control Panel and ensure the following points by referring Fan Speed parameters
using TML diagnostic tool before handing over to customer.
a) Physical check of Fan Speed change when requested.
b) Read ECU parameter
Blower Motor Diagnostic Feedback Input
, which should be requested values.
Circuit Schematic Diagram:-
“Refer the circuit schematics from the tool”
Component Location & Image:-
Connector Location: -
HVAC kit
Connector View & Information: -
PIN Assignment
1
CtrlSig
Control
Signal
PWM
2
DiagSig
Diagnostic
signal
Analog
3
-MotSig
Motor
signal
Analog
4
ACC
Supply
ACC
Supply
Power
5
Gnd
Ground
Gnd
Inspection Method: -
1)If there is no continuity between the Blower feedback line & ECU connector then correct the wiring harness
2) If there is a continuity between the Blower Feedback line and Ground line correct the wiring harness (wiring harness
short to Ground)