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.
- INSPECT INTEGRATION RELAY (UNIT C: C/OPN RELAY) NOTE:
- The EFI relay is built into the integration relay (unit C: C/OPN RELAY).
- Some relays are built into the integration relay. The integration relay cannot be disassembled. If there is a malfunction in the circuit of the integration relay, replace the integration relay.
- Using a screwdriver, detach the 2 claws and disconnect the integration relay from the No. 1 engine room junction block.
HINT:
Tape the screwdriver tip before use.
- Disconnect the 2 connectors from the integration relay.
- Measure the resistance between the terminals.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition 3G-5 - 3G-8 10 kΩ or higher 3G-5 - 3G-8 Below 1 Ω (when battery voltage is applied to terminals 3G-6 and 3G-7) If the result is not as specified, replace the integration relay.
- Connect the 2 connectors to the integration relay.
- Install the integration relay to the engine room No. 1 junction block.
- CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
- PERFORM INITIALIZATION
- Perform initialization (see INITIALIZATION
).NOTE: Certain system need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
- Perform initialization (see INITIALIZATION
).
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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