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: Inspection
- INSPECT NO. 1 INTEGRATION RELAY TEXT IN ILLUSTRATION
*1 No. 1 Integration Relay - - - EFI MAIN RELAY:
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 No. 1 Integration Relay Standard Resistance
Tester Connection Condition Specified Condition No. 1 integration relay 1B-1 - No. 1 integration relay 1A-8 Battery voltage is not applied between terminals 1C-7 and 1E-2 10 kΩ or higher No. 1 integration relay 1B-1 - No. 1 integration relay 1A-8 Battery voltage is applied between terminals 1C-7 and 1E-2 Below 1 Ω No. 1 integration relay 1B-1 - No. 1 integration relay 1C-3 No. 1 integration relay 1B-1 - No. 1 integration relay 1C-4 No. 1 integration relay 1B-1 - No. 1 integration relay 1C-9 No. 1 integration relay 1B-1 - No. 1 integration relay 1C-10 If the resistance is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- EFI MAIN2 RELAY:
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 No. 1 Integration Relay Standard Resistance
Tester Connection Condition Specified Condition No. 1 integration relay 1A-6 - No. 1 integration relay 1D-1 Battery voltage is not applied between terminals 1A-8 and 1E-2 10 kΩ or higher No. 1 integration relay 1A-6 - No. 1 integration relay 1D-1 Battery voltage is applied between terminals 1A-8 and 1E-2 Below 1 Ω No. 1 integration relay 1A-7 - No. 1 integration relay 1D-1 If the resistance is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- IG2 RELAY:
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 No. 1 Integration Relay Standard Resistance
Tester Connection Condition Specified Condition No. 1 integration relay 1A-1 - No. 1 integration relay 1D-3 Battery voltage is not applied between terminals 1C-8 and 1E-2 10 kΩ or higher No. 1 integration relay 1A-1 - No. 1 integration relay 1D-3 Battery voltage is applied between terminals 1C-8 and 1E-2 Below 1 Ω No. 1 integration relay 1A-3 - No. 1 integration relay 1D-3 No. 1 integration relay 1C-1 - No. 1 integration relay 1D-3 No. 1 integration relay 1C-2 - No. 1 integration relay 1D-3 No. 1 integration relay 1C-5 - No. 1 integration relay 1D-3 If the resistance is not as specified, replace the No. 1 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.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 No. 1 Integration Relay Standard Resistance
Tester Connection Condition Specified Condition No. 1 integration relay 1A-6 - No. 1 integration relay 1C-6 Battery voltage is not applied between terminals 1A-1 and 1E-1 10 kΩ or higher No. 1 integration relay 1A-6 - No. 1 integration relay 1C-6 Battery voltage is applied between terminals 1A-1 and 1E-1 Below 1 Ω No. 1 integration relay 1A-7 - No. 1 integration relay 1C-6 If the resistance is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- EFI MAIN RELAY:
NO RELATED
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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.