Connecting terminals TC and CG on your car’s OBD2 port with a jumper wire can help you read and clear Diagnostic Trouble Codes (DTCs), specifically for the Supplemental Restraint System (SRS), commonly known as the airbag system. This process allows you to identify and potentially resolve issues related to your vehicle’s airbags.
Reading SRS Codes with an OBD2 Jumper
To read the SRS codes, follow these steps:
- Turn off the ignition. Locate the OBD2 port, usually under the dashboard on the driver’s side.
- Connect TC and CG. Using a jumper wire, connect the terminals labeled TC and CG on the OBD2 port. Consult your vehicle’s repair manual to confirm the correct terminal locations.
- Turn on the ignition. The SRS light on your dashboard will begin to flash. Count the flashes to determine the code. Each series of short flashes represents a digit, separated by pauses. For instance, three flashes followed by a pause, then two flashes (3-2) indicates code 32. Longer pauses separate two-digit codes. The codes will repeat until the ignition is turned off.
Clearing SRS Codes with an OBD2 Jumper
Clearing the codes requires precise timing. Here’s the procedure:
- Turn off the ignition. Ensure the jumper wire is still connecting the TC and CG terminals.
- Turn on the ignition. As soon as the SRS light starts flashing the codes, remove the jumper wire from the TC terminal within 3 to 10 seconds. The SRS light will illuminate solidly after approximately 3 seconds.
- Reconnect and disconnect quickly. Within 2 to 4 seconds of the SRS light turning solid, reconnect the jumper wire to the TC terminal. Within another 2 to 4 seconds, disconnect the jumper wire. The light will go off and then turn solid again.
- Repeat. Repeat step 3. If all DTCs are cleared, the SRS light will flash steadily on and off. If codes remain, the light will flash the code sequence again, indicating which codes are still present.
Remember, this procedure is specific to reading and clearing SRS codes. Other systems may have different procedures for retrieving and clearing DTCs. Always consult your vehicle’s repair manual for specific instructions and safety precautions before working on any vehicle systems. Working with airbags can be dangerous; if you are unsure about any step, consult a qualified mechanic. This information is for educational purposes only and should not be considered professional automotive advice.
