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: 108 of 202

Trouble Shooting:-

Is DTC

B1F4B-23 is

Present?

Check for Blower Speed Up

Request functionality.

Check the Blower Speed Up

Request functionality by

pressing Speed Up button

Is Blower Speed Up

button stucked?

Check and lubricate switch if still the

Blower Speed Up button is stucked then

replace control panel.

Clear the DTC from the ECU memory.

Turn Ignition OFF & ON.

Check the Blower Speed Up Request

functionality by pressing Speed Up

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 B1F4B – 23 is present