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.
On-Vehicle Inspection
- DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
- REMOVE CIRCUIT OPENING RELAY (Marking: C/OPN)
- Remove the circuit opening relay from the instrument panel junction block.
- INSPECT CIRCUIT OPENING RELAY
- Measure the resistance of the circuit opening relay.
Standard resistance
TESTER CONNECTION - SPECIFIED CONDITIONSTester Connection Specified Condition 3 - 5 10 kΩ or higher 3 - 5 Below 1 Ω
(when battery voltage is applied to terminals 1 and 2)If the result is not as specified, replace the circuit opening relay.
- Measure the resistance of the circuit opening relay.
- INSTALL CIRCUIT OPENING RELAY
- CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
Use the Manual With the Right Hardware
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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.
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