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 DIAGNOSISHYBRID DRIVE SYSTEMSPOWER CONTROL SYSTEMSYSTEM MAIN RELAY, HYBRID DRIVETESTING AND INSPECTIONHV RELAY ASSEMBLY
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) Hybrid
HV Relay Assembly
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) HybridSECTION HV Relay Assembly
HYBRID / BATTERY CONTROL: HV RELAY ASSEMBLY: INSPECTION
1. INSPECT HYBRID BATTERY JUNCTION BLOCK ASSEMBLY
(a) Inspect SMRB
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
If the result is not as specified, replace the hybrid battery junction block assembly.
(b) Inspect SMRG
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
If the result is not as specified, replace the hybrid battery junction block assembly.
(c) Inspect SMRP and precharge resistor
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
If the result is not as specified, replace the hybrid battery junction block assembly.
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.