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.
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HOMESERVICE MANUALSTOYOTA2011YARIS L4-1.5L (1NZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSMAIN RELAY (COMPUTER/FUEL SYSTEM)TESTING AND INSPECTION
2011 Toyota Yaris L4-1.5L (1NZ-FE)
Main Relay (Computer/Fuel System): Testing and Inspection
2011 Toyota Yaris L4-1.5L (1NZ-FE)SECTION Testing and Inspection
1NZ-FE ENGINE CONTROL SYSTEM: INTEGRATION RELAY: INSPECTION
1. INSPECT INTEGRATION NO.1 RELAY
(a) Inspect the EFI fuse.
(1) Disconnect the fuse.
Text in Illustration
(2) Measure the resistance of the fuse.
Standard Resistance:
(b) Inspect the EFI relay.
(1) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
NOTICE:
While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.
If the result is not as specified, replace the integration relay.
(c) Inspect the FAN NO.1 relay.
(1) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
NOTICE:
While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.
If the result is not as specified, replace the integration relay.
(d) Inspect the AM2 fuse.
(1) Disconnect the fuse.
Text in Illustration
(2) Measure the resistance of the fuse.
Standard Resistance:
(e) Inspect the IG2 relay.
(1) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
If the result is not as specified, replace the integration relay.
RENDER: 1.0x
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.