Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 81 (AIR BAG RESTRAINT SYSTEMS)DIAGNOSTICSRETRIEVING CODESUSING DIAGNOSIS CHECK WIRE
2004 Toyota Matrix XR, FWD, Standard
Using Diagnosis Check Wire
2004 Toyota Matrix XR, FWD, StandardSECTION Using Diagnosis Check Wire
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
- To check for past codes, go to next step. To check for present codes, turn ignition switch to ON position. Wait about 20 seconds. Using Diagnosis Check Wire (09843-18040), connect terminals Tc and CG of Data Link Connector (DLC3). See Figure. DLC3 is located under left side of instrument panel. Go to step 3.
- To check for past codes, connect Diagnosis Check Wire (09843-18040) to terminals Tc and CG of Data Link Connector (DLC3). See Figure. Turn ignition switch to ON position. Wait about 20 seconds. Go to next step.
- If AIR BAG warning light flashes 2 times per second, system is normal (normal code). If AIR BAG warning light does not flash Diagnostic Trouble Codes (DTCs) or flashes DTCs without DLC3 connection, DTCS NOT DISPLAYED or DTCS CONTINUOUSLY DISPLAYED under DIAGNOSTIC TESTS. If AIR BAG warning light is on continuously and DTC is normal (flashes 2 times per second), source voltage is low. Go to SOURCE VOLTAGE DROP under DIAGNOSTIC TESTS.
- If AIR BAG warning light flashes, count number of flashes to determine DTCs that are set. For example, DTC 12 is: FLASH, 1.5-second pause, FLASH, FLASH. If more than one DTC is displayed, a 2.5-second pause will occur between each DTC. Lowest numbered DTC will be displayed first, followed by next higher number DTC until all DTCs have been displayed.
- After all DTCs are displayed, a 4-second pause will occur, and DTC display will be repeated. See appropriate DTC under DIAGNOSTIC TESTS . After repairing, clear DTCs. See CLEARING CODES .NOTE: If DTCs other than those listed under DIAGNOSTIC TESTS are displayed, replace the air bag sensor assembly. If the AIR BAG warning light does not function as described, proceed to appropriate test under DIAGNOSTIC TESTS .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.