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Vehicle Platform: OSPREY / AMP
ECU Name: PEPS
DTC Troubleshooting Data
Version: 1.2
Date: 29 Mar 2017
Author:
Rajasekhara Reddy
Page: 192 of 369
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.
B1642 – 14:- Brake Switch– Short to Ground or Open
Overview:- (NOTE:- This signal is applicable for AT and AMT variant vehicle only. )
ISO Code (DTC Code)
B1642 - 11
Customer Symptom
1. Passive vehicle starting will not work only clamp state
will change from OFF/ACC/IGN in AT/AMT.
Fault Effects (On Vehicle)
1. Passive vehicle starting will not work only clamp state
will change from OFF/ACC/IGN in AT/AMT.
Lamp Status (If Any)
N.A.
Fault Detection Condition
1. Permanent short circuit to ground/open of brake signal
of brake switch.
2. Wire cut & shorting to ground/open of Connector-2 /
Pin-2 signal.
3. Bending of pin-2 of connector-2 and shorting to each
adjacent pin.
Normal Operating Condition
1. Vehicle battery voltage shall be normal.
2. Brake pedal shall not be pressed continuously for
more than 3 min.
3. Valid paired UID should be present inside the vehicle,
brake pedal press and SSB should be pressed.
Probable Trouble Area
1. Permanent short circuit to ground/open of brake signal
of brake switch.
2. Wire cut & shorting to ground/open of Connector-2 /
Pin-2 signal with vehicle body.
3. Bending of pin-2 of connector-2 and shorting to
ground/open pin.
Healing Condition
1. After fixing short to ground/open fault on brake signal
of brake switch, passive vehicle start should work
normally.
Table42
:- B1642-14 overview details
Component Details:-
1. Brake switch.
2. PEPS ECU
Preliminary Checks:-
1. Check vehicle battery voltage, it should be normal.
2. Check ECU pins for oxidation, bending or damage.