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 [08/2019 - ]: Procedure
- INSPECT NO. 1 INTEGRATION RELAY
- Using a screwdriver, detach the 2 claws and disconnect the No. 1 integration relay from the engine room junction block.
HINT:
Tape the screwdriver tip before use.
TEXT IN ILLUSTRATION*a Protective Tape - Check the IG2 fuse.
- Check the IG2 relay.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1J-1 - 1M-8 Battery voltage not applied to terminals 1M-2 and 1N-4 10 kΩ or higher Battery voltage applied to terminals 1M-2 and 1N-4 Below 1 Ω TEXT IN ILLUSTRATION*a Component without harness connected
(No. 1 Integration Relay)If the result is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- Check the EFI main No. 1 fuse.
- Check the EFI main No. 1 relay.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1J-1 - 1N-10 Battery voltage not applied to terminals 1N-8 and 1N-4 10 kΩ or higher Battery voltage applied to terminals 1N-8 and 1N-4 Below 1 Ω TEXT IN ILLUSTRATION*a Component without harness connected
(No. 1 Integration Relay)If the result is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- Check the A/F fuse.
- Check A/F relay.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1J-1 - 1N-3 Battery voltage not applied to terminals 1N-2 and 1N-4 10 kΩ or higher Battery voltage applied to terminals 1N-2 and 1N-4 Below 1 Ω TEXT IN ILLUSTRATION*a Component without harness connected
(No. 1 Integration Relay)If the result is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- Check the AIR PMP HTR fuse.
- Check AIR PMP HTR relay.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1J-1 - 1K-12 Battery voltage is not applied to terminals 1K-8 and 1K-11 10 kΩ or higher Battery voltage is applied to terminals 1K-8 and 1K-11 Below 1 Ω TEXT IN ILLUSTRATION*a Component without harness connected
(No. 1 Integration Relay)If the result is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- Check the AI VSV fuse.
- Check AI VSV relay.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1J-1 - 1L-2 Battery voltage is not applied to terminals 1L-1 and 1L-3 10 kΩ or higher Battery voltage is applied to terminals 1L-1 and 1L-3 Below 1 Ω TEXT IN ILLUSTRATION*a Component without harness connected
(No. 1 Integration Relay)If the result is not as specified, replace the No. 1 integration relay.
- Measure the resistance according to the value(s) in the table below.
- Attach the 2 claws to install the No. 1 integration relay to the engine room junction block.
- Using a screwdriver, detach the 2 claws and disconnect the No. 1 integration relay from the engine room junction block.
- INSPECT MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) NOTE:
The ACC relay and IG1 No. 1 relay are built into the main body ECU (driver side junction block).
- Inspect the ACC relay.
- Measure the resistance according to the value(s) in the table below.TEXT IN ILLUSTRATION
*a Component without harness connected
(Main Body ECU (Driver side Junction Block))- - Standard Resistance
Tester Connection Condition Specified Condition 2N-50 - 2K-1 Battery voltage not applied to terminals 2N-23 and 2O-1 10 kΩ or higher Battery voltage applied to terminals 2N-23 and 2O-1 Below 1 Ω If the result is not as specified, replace the main body ECU (driver side junction block).
- Measure the resistance according to the value(s) in the table below.
- Inspect the IG1 No. 1 relay.
- Measure the resistance according to the value(s) in the table below.TEXT IN ILLUSTRATION
*a Component without harness connected
(Main Body ECU (Driver side Junction Block))- - Standard Resistance
Tester Connection Condition Specified Condition 2O-32 - 2K-1 Battery voltage not applied to terminals 2N-22 and 2O-1 10 kΩ or higher Battery voltage applied to terminals 2N-22 and 2O-1 Below 1 Ω If the result is not as specified, replace the main body ECU (driver side junction block).
- Measure the resistance according to the value(s) in the table below.
- Inspect the ACC 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.