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 MANUALSTOYOTA2009CAMRY HYBRIDREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERSTARTING SYSTEM (HYBRID)SMART KEY SYSTEMPOWER SOURCE MODE DOES NOT CHANGE TO ON (READY)DESCRIPTION
2009 Toyota Camry Hybrid
Power Source Mode does not Change to ON (READY): Description
2009 Toyota Camry HybridSECTION Description
- POWER SWITCH ON (READY) FUNCTION
- If the power switch is pressed with the shift lever in the P position and the brake pedal depressed, the main body ECU determines that it is a HV control system on (READY) request.
- The certification ECU and other ECUs perform key verification via the LIN communication line.
- The main body ECU activates the ACC relay.
- The main body ECU activates the IG1 and IG2 relays.
- The certification ECU outputs a steering UNLOCK signal. The signal is sent to the main body ECU via the steering lock ECU.
- The main body ECU sends an on (READY) request signal to the HV control ECU.
- When HV control system on (READY) requests signal, the main body ECU determines that the HV control system has been on (READY).
The ECU reactivates turns off the power switch indicator light.
SYMBOLS OF MAIN BODY ECU AND SIGNALS REFERENCESymbols of main body ECU Signals STP Stop light switch ON signal SSW1/SSW2 Power switch ON signal ACCD ACC relay operation signal IG1D IG1 relay operation signal SLP Steering lock position signal IG2D IG2 relay operation signal P Park/neutral position switch signal RDY HV control system on (READY) detection signal STSW HV control system on (READY) request signal
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.