HARRIER BOOK 2

Q5/X451 FATC

DTC Troubleshooting Data

Version: 1.0

Date: 16-Oct-2018

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.

Author: ERC

Page: 105 of 202

Trouble Shooting:-

Is DTC

B1F4A-23 is

Present?

Check for AC button

functionality.

Check the AC functionality by

pressing AC button ON to OFF

and vice versa

Is AC button

stucked?

Check and lubricate switch if still the AC

button is stucked then replace control

panel.

Clear the DTC from the ECU

memory.

Turn Ignition OFF & ON.

Check the AC functionality by

pressing AC button

Stop

YES

Turn ON Ignition.

Connect the TML Diagnostic Tool.

Check the status of DTC’s (Memorized/Current)

Record the DTC & Clear DTC’s

Turn Ignition OFF & ON

Verify If DTC B1F4A – 23 is present