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.
Integration Relay: Inspection
- INSPECT INTEGRATION RELAY
- EFI MAIN relay.
- Measure the resistance according to the value(s) in the table below
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition Integration relay (2C-1) - Integration relay (2A-8) No battery voltage is applied across terminals 2A-6 and 2A-7 10 kΩ or higher Integration relay (2C-1) - Integration relay (2A-8) Battery voltage is applied across terminals 2A-6 and 2A-7 Below 1 Ω If the resistance is not as specified, replace the integration relay
- Measure the resistance according to the value(s) in the table below
- EFI No. 2 relay:
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition Integration relay (2C-1) - Integration relay (2B-4) No battery voltage is applied across terminals 2B-2 and 2B-3 10 kΩ or higher Integration relay (1C-1) - Integration relay (2B-4) Battery voltage is applied across terminals 2B-2 and 2B-3 Below 1 Ω If the resistance is not as specified, replace the integration relay.
- Measure the resistance according to the value(s) in the table below.
- INJ relay:
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition Integration relay (2C-1) - Integration relay (2A-4) No battery voltage is applied across terminals 2A-2 and 2A-3 10 kΩ or higher Integration relay (2C-1) - Integration relay (2A-4) Battery voltage is applied across terminals 2A-2 and 2A-3 Below 1 Ω If the resistance is not as specified, replace the integration relay.
- Measure the resistance according to the value(s) in the table below.
- C/OPN relay.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition Integration relay (2B-5) - Integration relay (2B-8) No battery voltage is applied across terminals 2B-6 and 2B-7. 10 kΩ or higher Integration relay (2B-5) - Integration relay (2B-8) Battery voltage is applied across terminals 2B-6 and 2B-7 Below 1 Ω If the resistance is not as specified, replace the integration relay.
- Measure the resistance according to the value(s) in the table below.
- EFI MAIN relay.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.