On Board Volvo — 240 and 700 Series SRS Diagnostic Codes
Greetings! Trying to locate what this switch is – aftermarket or OEM? The Google revealed no results and hoping you might be able to. Many thanks.leucadiacruiser
It is the SRS (airbag) diagnostic access port. You insert a wire lead and ground the wire to access flash codes for the faults. There was a black plastic cover inserted that has “SRS” embossed on it.jimmy57
SRS Diagnostic Explanation
The 960 and 940 after 1992 had SRS diagnostic capability using the On-Board Diagnostic (OBD) unit in the engine compartment.
[Jay Simkin] Always read the codes three times before resetting them. Often they will not reset after just one, or even two readings. If you still have SRS trouble codes, try this as a last resort. Disconnect the negative battery terminal clamp. Let the car sit for 1/2 hour. Reconnect the negative terminal clamp and drive the car. Do this three times. If the SRS light re-sets, fine. If not, it is time to replace the SRS sensor.
In 780 cars, the test point for the SRS OBD system is not in the front row of fuse sockets nor in the engine compartment, but rather is a brown/black wire with a female spade connector, located in the vicinity of the fuse panel or behind the radio. Reading codes is done the same way as above by grounding the wire.https://www.volvoclub.org.uk/faq/ElectricalSRS.html
The 1987 to 1992 7 series, the 1990 to 1991 2 series and the 1992 940 also had a diagnostic capability. Click through to the Volvo Forum post to get the downloadable PDF.
Have a Volvo 940 or 960? Jump to the Volvo 940 and 960 SRS diagnostics. Same thing as this, but for those models.SRS Diagnostics for 240, 740, 760 and 780