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 MANUALSLEXUS2012CT 200H L4-1.8L (2ZR-FXE) HYBRIDREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSOXYGEN SENSOR RELAYTESTING AND INSPECTION
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) Hybrid
Oxygen Sensor Relay: Testing and Inspection
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) HybridSECTION Testing and Inspection
POWER DISTRIBUTION: INTEGRATION RELAY: ON-VEHICLE INSPECTION
1. INSPECT NO. 1 INTEGRATION RELAY
HINT
* This inspection is not for the No. 1 integration relay itself, but for the wire harness that is connected to the No. 1 integration relay. If the result is within the specified condition, the No. 1 integration relay may be malfunctioning.
* If the result is not as specified, a short between No. 1 integration relay and one of the electrical loads is suspected.
* After the wire harness has been repaired, disconnect all connectors that are connected to the No. 1 integration relay, and turn the power switch on (READY) to clear the DTCs.
(a) Diagnosis Terminal
(1) Confirm that the system that is malfunctioning.
(2) Make sure that the malfunction is reproduced.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
If the result is not as specified, a short between No. 1 integration relay and one of the electrical loads is suspected.
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.