Many scanners are set to read just the basic engine codes. The Scanner - Make sure the scanner being used to read the airbag diagnostic codes is able to:
Module has to be completely bolted down / installed as designed. Module is improperly grounded - A simple but overlooked problem. Those pins sometimes can become bent, pushed back in or even broken off. The Problem: "So you have an airbag light on but you are not able to pull any airbag codes from the airbag system at the moment."Īirbag Module "No Communication" issues commonly fall into these problem areas:Ĭommunication Pins at plug - Inspect the communication pins where the harness plugs into the front of the module. If thats you, Just think of some of these as refresher or a "check list" Many of my customer's are highly experienced Body Shop owners and Professionals will find these pretty simple and common knowledge. There can be different causes and different solutions! Here's a few that I've come across over the years. The interesting thing with this problem - There isn't ONE specific problem that always causes this problem. The main reason I wanted to write this article is to help you guys know in advance! (without having to actually pay for a reset or anything)! When I do hear about this issue, its when I speak to customer's who have already sent in the module to us for reset, but sometimes it happens as of result of something before the reset. ( ACM ) (Sometimes also referred to as: RCM - Restraint Control Module DERM or SDM - Sensing Diagnostic Module SRS unit / SRSM module - supplemental restraint system ) If the DTC refuses to clear then the system probably still has a fault.From time to time, I'll get asked about an issue where the customer has no communication with the airbag control module. If it does, reconnect the jumper wire within 2-4 seconds. Then see if the SRS warning light comes back on after 3 seconds. If they are not, then you need to reconnect the jumper to pins 4 and 13, make the car IG-ON again, allow the DTC sequence to be produced, then disconnect the jumper wire within 3 - 10 seconds after the sequence stops. Record those sequences.Īfter you make the car IG-OFF, the codes might be automatically cleared. There may be more than one two-digit sequence stored. Hence Pin 1 is at the bottom right, while Pin 16 is at the upper left.Īfter the car is made IG-ON, the SRS light should flash a two-digit sequence which is the trouble code. The pin numbering starts from the right side of the bottom row of the connector which is wider than the top row. To clear the SRS ECU DTC, connect pins 4 and 13 of the OBD-II connector and make the car IG-ON. The skid control ECU and SRS ECU have nonvolatile memory that will not reset just because the 12V power is removed.
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