Power Source Mode does not Change to ON (READY): Description
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
- POWER SWITCH ON (READY) OPERATION
- When the power switch is pressed with the brake pedal depressed and shift lever in P, the main body ECU determines that it is a hybrid control system start request.
- The certification ECU and other ECUs perform key verification via the LIN communication line The power switch indicator light illuminates in green.
- The main body ECU activates the D-IG1 relay, D-ACC relay and ignition relay No. 2 (IG2)
- The certification ECU outputs a steering UNLOCK signal The signal is sent to the steering lock ECU via the LIN communication line
- The main body ECU sends a power switch ON (READY) request signal to the hybrid vehicle control ECU
- The main body ECU deactivates the D-ACC relay until the ECU detects that the power switch is ON (READY)
- The ECU reactivates the D-ACC relay and turns OFF the power switch indicator light.MAIN BODY ECU SYMBOLS REFERENCE
Symbols of main body ECU Signals SSW1/SSW2 Power switch ON (ACC, IG) signal IG1D D-IG1 relay operation signal ACCD D-ACC relay operation signal IG2D Ignition relay No 2 (IG2) operation signal STP Stop light switch signal P Shift lock signal RDY Power switch ON (READY) signal STSW Hybrid control system activation request signal