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SRS / Airbag
ECU – DTC Troubleshooting Guide
Version: 14.0
Date: 14-February-2017
Prepared by:Airbag COC Review &
Approved by:Sanjeev VM
Page: 495 of 549
B0029-1A:- Right Curtain Deployment Control circuit resistance below threshold
Overview:-
ISO Code
B00291A
Customer Symptom
SRS Warning Lamp continuously ON in Instrument Cluster
Fault Effects (On Vehicle)
Firing of “Right Curtain Deployment Control” is not guaranteed,
if a crash happens.
Lamp Status (If Any)
SRS Warning Lamp continuously ON in Instrument Cluster
Fault Detection Condition
This fault gets logged if the circuit resistance of Right Curtain is
below the threshold value (1.7 Ohm) after 4 seconds of
cranking.
Normal Operating Condition
The minimum threshold for Right Curtain Deployment Control
circuit is 1.7 Ohm.
Probable Trouble Area
Related wiring Harness, connector or terminals
Right Curtain Module
Airbag ECU
Healing Condition
Minimum threshold resistance for Right Curtain resistance
should be 1.7 Ohm.
Component Details:-
Right Curtain Module
:
- In the vehicle, curtain Airbag is folded and installed behind roof headliner on right side of the
vehicle.
Airbag ECU
: - It is fitted in the floor of central console in the car. The Airbag Electronic Control Unit (ECU) controls the
deployment system to allow an appropriate igniting of the Airbags and belt pre-tensioners to restrain the driver and
passengers.
Preliminary Checks:-
1. Check Battery Voltage (12 V & above)
2. Check for any faults in Airbag Warning Lamp indication in Instrument Cluster.
3. Ensure the proper locking of Airbag ECU wiring harness connectors in the vehicle by the locking sound.
Trouble Shooting:-