Kanger 2.0 iVBAC DTC Troubleshooting data Version: 1.0 Date: 31-March-22 Author: ERC, Chassis CoC This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. Copyright © TATA MOTORS Ltd. P a g e | 107 C0040-02 :- Brake Light Switch - Signal Plausibility Failure Overview: ISO Code C0040-02 Customer Symptom Warning Light Displayed Fault Effects (On Vehicle) NA Lamp Status (If Any) EBD - Degraded function ABS & ESC – Not available Fault Detection Condition ABS – OFF, EBD – OFF, ESC – OFF Normal Operating Condition I VBAC ECU is functional in between 10V to 16V Probable Trouble Area Master cylinder pressure increase without any input from BLS(VCU) The BLS-signal is set while the accelerator pedal is pressed with no active control for a long time Mechanical defect or wrong mounting of BLS Healing Condition Fault Rectification/BLS replacement Component Details: NA Preliminary Checks: Examine the mounting of the Brake light switch and correct if defective. Check BLS (Hard wired to VCU) & its wiring harness. There should not be any short circuit conditions. After rectifying the fault perform Ignition Off/On and apply/release brake to get fault free system.
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