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Vehicle Platform: Tiago,Tigor & Osprey
ECU Name: Hella Body Control Module (BCM)
DTC Troubleshooting Data
Version: 2.0
Date: 22-10-2018
Author: Parag K
Page: 527 of 737
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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.
B223B – 23: Rear Washer Switch – Signal Stuck Low
Overview:
ISO Code
B223B - 23
Customer Symptom
Rear Washer pump does not operate.
Fault Effects (On Vehicle)
Rear Washer Pump will not come ON
Lamp Status (If Any)
NA
Fault Detection Condition
This fault gets logged by BCM; if signal stuck low condition is
detected for Rear washer switch.
Normal Operating Condition
If the IGN is ON then Rear wash pump shall turn ON
immediately after pressing the Rear washer switch.
Probable Trouble Area
1. BCM connector Fault
2. Cockpit Rear washer switch input wire Short to
ground
3. Switch damaged or stuck
4. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Operate Rear washer switch from Off
On
Off
3. Clear DTC Command
Component Details:
Rear Washer switch is part of Combi switch. If the IGN is ON and user presses the Rear washer switch, Rear
washer pump will turn ON.
Preliminary Checks:
1. Check Battery Voltage (12.5 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-