SRS System MIL ON - False Trouble Codes
SI. No. 850-2076PI No.
Date: April 1999
Distr.: all
9-3
False diagnostic trouble codes in airbag system (SRS)
Cars affected
Saab 9-3 M99 up to and including VIN X2027727
Background
On occasions, the AIR BAG lamp may go on without the presence of a permanent fault in the airbag system. Apparently, the fault can be insufficient crimping of cable lugs in the electrical harness between the control unit and the seat connector. Diagnostic trouble code B2863 or B2868 will then be generated.
In case of complaints from customers, proceed as follows.
Parts required
51 08 089 Wiring harness (CA: 30581758)
79 71 880 Cable tie, 5 pcs. (CA: 30509027)
79 84 784 Cable tie, 2 pcs. (CA: 30551667)
30 04 785 Fabric-backed tape (CA: 30559782)
Tools
85 80 151 Connector pin removal toolkit
86 12 335 Reference resistor
These tools were issued as Essential Special Tools. If you need additional quantities, you can order directly from Kent-Moore at 1-800-345-2233.
Procedure
1. Remove seats as described in WIS, see 8. Body / Seats / Front seat.
2. Remove center console as described in WIS, see 8. Body/Interior equipment / Centre console.
3. Remove all scuff plates.
4. Remove rear seat air vents on left and right - hand sides.
5. Lift up carpet and support it with wooden block or similar.
6. Open covers on cable conduits.
7. Cut loose cable tie at control unit and unplug connector from control unit.
8. Cut off cable tie from cable outlet and unplug connector.
9. Extract cable lugs from positions 10, 11, 13 and 14. Press away lock tab with a small screwdriver.
Note:
The lock tab may have to be pressed away a second time when the cable lug is half way out of the connector.
10. Clip off the cable lugs, fold cable ends back on wiring harness and secure with tape. Use fabric-backed tape.
11. Extract cable lugs from positions 7 and 9 in the 29-pin connector to left-hand seat. Use special tool 85 80 151.
12. Clip off the cable lugs, fold cable ends back on wiring harness and secure with tape.
13. Insert orange cables to positions 7 and 9 in the 29-pin connector to left-hand seat.
14. Tape together new wiring harness to old one towards cable conduit. Lay harness in conduit and under air duct.
Important:
Take care not to damage the cable lugs when laying the cable.
Close cover on cable conduit.
WARNING:
Ensure the cables are free from sharp edges.
15. Insert cables in connector to control unit. Orange cables in positions 10 and 11. White cables in positions 13 and 14.
16. Plug in connector and fit cable tie around cable outlet.
17. Extract the cable lugs from positions 7 and 9 in the 29-pin connector to the right-hand seat. Use special tool 85 80 151.
Clip off the cable lugs, fold cable ends back on wiring harness and secure with tape.
18. Insert white cables in positions 7 and 9 in the 29-pin connector to right-hand seat.
19. Cut loose cable ties, 3 pcs., and tape together new cable harness with old one towards cable conduit. Start with 29-pin connector.
20. Lay harness in cable conduit, fit new cable ties and close cover.
21. Connect Tech 2.
22. Connect a reference resistor, part no.86 12 335, to driver's seat connector.
23. Switch on the ignition.
24. Clear diagnostic trouble codes in SRS system.
25. Read diagnostic trouble codes. An open circuit should be indicated for passenger seat.
26. Turn off ignition.
27. Transfer reference resistor to passenger seat.
28. Switch on the ignition.
29. Clear diagnostic trouble codes in SRS system.
30. Read diagnostic trouble codes. An open circuit should be indicated for driver's seat.
31. If other codes generated; check that harness is connected correctly.
32. Replace carpet. Fit scuff plates and air vents for rear seat.
33. Fit center console as described in WIS, see 8. Body / Interior equipment/ Centre console.
34. Fit seats as described in WIS, see 8. Body / Seats / Front seat.
35. Clear diagnostic trouble codes and make sure resistance in SRS circuit for each seat is 2.5 +/- 0.3 ohms with Tech 2.
Disconnect Tech 2.
36. Start engine and see if AIR BAG lamp indicates a fault.
Warranty information.
Warranty/Time Information
Failed Object: 37136
Fault/Reason code: 61
Location code: 09 (US = 0)
Warranty Type (US): 01
Repair/Action code: 01
Labour Operation (US): 37136
Time: 1.6
(CA: N1731 1.6 hrs.)
FOR DCS DEALERS, PLEASE ADD THE FOLLOWING INFORMATION TO YOUR DCS
TABLES:
OPERATION NUMBER TABLE:
OPERATION NUMBER: 37136
DESCRIPTION: REPLACE SRS WIRING HARNESS
TRANS.TYPE: B
ENG. TYPE: 9
DIAG. CODE REQD: 0
M94-900
HOURS: 1.6
BEGIN YR.: 99
END YR.: 99
DISCLAIMER