ServiceNews Article
Dec 2014
A13030A
Wrong SRS Replacement Parts Can Cause SRS DTCs 41-xx thru 46-xx
Currently Applies To: โ12 Civic Sedan, โ12 Civic Sedan Si, and โ11 CR-V
EDITORโS NOTE: This article revises the one posted in March 2013. Changes are highlighted in yellow.
Do you have a vehicle back from the body shop or just had some SRS parts replaced, and the SRS indicator is on with any or all of these SRS DTCs? โข 41-xx (no signal from the left front impact sensor)
- 42-xx (no signal from the right front impact sensor)
- 43-xx (no signal from the left side impact sensor) (first)
- 44-xx (no signal from the right side impact sensor) (first)
- 45-xx (no signal from the left side impact sensor) (second)
- 46-xx (no signal from the right side impact sensor) (second)
Chances are, some wrong SRS replacement parts were installed.
At various times during production, we used both Continental- and TRW-supplied parts. Although the wiring harnesses and connectors are exactly the same, each supplier has a different way of sending signals between the impact sensors and the SRS unit. This action doesnโt apply to Japan-built models or Civic Coupes. All Civic Coupes come with Continental-supplied parts.
After a deployment, the SRS must be repaired with replacement parts from the same supplier that was originally used in production. If those parts are mixed and matched on the same vehicle, youโll wind up with this problem.
NOTE: A mismatched first side impact sensor could cause a DTC for a second side impact sensor, or vice versa. So, always make sure all of the impact sensors and the SRS unit match.
SRS Supplier Identification
To fix this problem, first you need to know which supplierโs SRS was originally installed on the vehicle youโre working on. This chart tells you that:
| Model | Factory | SRS Supplier | Start VIN | End VIN |
| 2012 Civic Sedan | Canada
Plant 1 | TRW | 2HGFB2…CH500001 | 2HGFB2…CH515145 |
| Continental | 2HGFB2…CH515146 | 2HGFB2…CH515685 | ||
| TRW | 2HGFB2…CH515686 | End of production | ||
| Canada
Plant 2 | TRW | 2HGFB2…CH300001 | 2HGFB2…CH307888 | |
| Continental | 2HGFB2…CH307889 | 2HGFB2…CH308442 | ||
| TRW | 2HGFB2…CH308443 | End of production | ||
| 2012 Civic Sedan
Si | Canada | TRW | 2HGFB6E5.CH700001 | 2HGFB6E5.CH700071 |
| Continental | 2HGFB6E5.CH700072 | 2HGFB6E5.CH700161 | ||
| TRW | 2HGFB6E5.CH700162 | End of production | ||
| 2012 Civic Sedan | Indiana | TRW | 19XFB2…CE000001
19XFB2…CE300001 | 19XFB….CE006019
19XFB….CE305214 |
| Continental | 19XFB2…CE006020
19XFB2…CE305215 | 19XFB2F5.CE010499
19XFB2F9.CE308945 |
| Model | Factory | SRS Supplier | Start VIN | End VIN |
| 2012 Civic Sedan | Indiana | TRW | 19XFB2…CE010500
19XFB2…CE308946 | End of 12MY production End of production |
| 2011 CR-V 2WD | Ohio | TRW | 5J6RE3H..BL000001 | 5J6RE3H..BL041105 |
| Continental | 5J6RE3H..BL041106 | 5J6RE3H..BL051849 | ||
| TRW | 5J6RE3H..BL051850 | End of production | ||
| 2011 CR-V 4WD | Ohio | TRW | 5J6RE4H..BL000001 | 5J6RE4H..BL084048 |
| Continental | 5J6RE4H..BL084049 | 5J6RE4H..BL105927 | ||
| TRW | 5J6RE4H..BL105928 | End of production |
SRS Parts Indentification
Continental and TRW SRS parts have physical differences that make them easy to tell apart.
- Continental units have a smooth housing. The barcode label doesnโt have a logo and itโs separate from the notice.
- TRW units are scalloped around the outside of the housing. The barcode label has the TRW logo and itโs combined with the notice.
- The replacement part number for either unit is the first 11 characters of the 14-character model number on the barcode label.
Front and Side Impact Sensors
- The flat side of a Continental impact sensor is black.
- The flat side of a TRW impact sensor is white.
- Neither sensor has a logo.
- TRW impact sensors have three angular braces next to the mounting bolt hole.
- The replacement part number for either sensor is the first 11 characters of the 14-character model number on the barcode label.
SRS Replacement Parts
Here are all of the SRS replacement parts and their part numbers, as they apply to each model:
| Model | Replacement Part (From Parts Catalog Description) | Part Number | Supplier |
| 2012 Civic | SRS Unit (Sedan) | 77960-TR0-C01 | Continental |
| SRS Unit (Coupe) | 77960-TS8-A01 | ||
| Bracket, R. SRS Sensor (w/Sensor) | 77930-TS8-B11 | ||
| Bracket, L. SRS Sensor (w/Sensor) | 77930-TS8-B21 | ||
| Sensor Assy., Side Impact (Sedan) | 77970-T0A-J01 | ||
| Sensor Assy., Side Impact (Coupe) | 77970-TS8-A01 | ||
| SRS Unit | 77960-TR0-A01 | TRW | |
| Sensor Assy., Fr. Crash – RH | 77930-TR0-B11 | ||
| Sensor Assy., Fr. Crash – LH | 77930-TR0-B21 | ||
| Sensor Assy., Side Impact | 77970-TR0-A11 | ||
| 2011 CR-V | SRS Unit | 77960-SWA-L21 | Continental |
| Sensor Assy., Fr. Crash | 77930-SWA-E11 | ||
| Sensor Assy., Side Impact | 77970-SWA-E11 | ||
| SRS Unit | 77960-SWA-A22 | TRW | |
| Sensor Assy., Fr. Crash | 77930-SWA-A11 | ||
| Sensor Assy., Side Impact | 77970-SWA-A11 |
Once youโve detemined which supplierโs SRS the vehicle should have, then you need to find out if there are any wrong parts installed. There are several ways you can do that, depending on the model and whatโs still available from the body shop that did the work.
- Replaced Parts Available: In this case, you can compare the barcode labels on the replaced parts to the SRS Replacement Parts chart in this article.
- Body Shop RO or Parts Ordering Paperwork Available: In this case, you can compare the part numbers that were ordered to the SRS Replacement Parts
- No Replacement Parts or Shop Paperwork Available: In this case, youโll need to inspect the SRS unit and impact sensors, and compare them to the SRS Parts Identification photos and the SRS Replacement Parts chart in this article. To help save you time, use the set DTCs to focus your inspection. For example, if DTC 41-xx is set, start with the left front impact sensor.
NOTE: If youโre working on a Civic, the HDS can tell you which supplierโs SRS unit is installed. Just go to SRS Data List, and scroll down to ECU MAKER. Youโll see either CONTINENTAL or TRW. Keep in mind, no part number is shown, just the maker.
If you find any wrong parts, replace them with the right ones based on the SRS Replacement Parts chart. When youโre done, clear the DTCs, and if needed, initialize the ODS unit. In the unlikely event that all the right parts were installed, continue with normal DTC troubleshooting. A bad sensor, wiring, or SRS unit can also set those DTCs.
Prevention Tips
The best way to keep this problem from happening is for the body shop to order the right replacement parts. The SRS Supplier Identification chart says which supplierโs SRS the vehicle should have. The SRS Replacement Parts chart gives accurate parts ordering info.
For More Info
To learn more about this, be sure to check out self-study module RSC26, Restraint System Repair
Procedures, in the dealerโs Online University. Youโll also find some good guidance in the February 2012 ServiceNews article โSRS Indicator On, but Canโt Read Any DTCs? Read This,โ and the Tech2Tech segments โTurning Off the SRS Indicator When the Body Shop Canโtโ and โWrong Replacement Parts Can Cause SRS DTCs.โ
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