Lexus ES: System Diagram
SYSTEM DIAGRAM
| Transmitting ECU (Transmitter) | Receiving ECU | Signal | Communication Method |
|---|---|---|---|
| Skid control ECU (Brake booster with master cylinder assembly) | Power steering ECU (Rack and pinion power steering gear assembly) |
| CAN communication line |
| Main body ECU (Multiplex network body ECU) | Skid control ECU (Brake booster with master cylinder assembly) | Driver side seat belt buckle switch signal | CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Hybrid vehicle control ECU |
| CAN communication line |
| Hybrid vehicle control ECU | Skid control ECU (Brake booster with master cylinder assembly) |
| CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Steering angle sensor | Steering angle sensor request signal | CAN communication line |
| Steering angle sensor | Skid control ECU (Brake booster with master cylinder assembly) | Steering angle sensor signal | CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Yaw rate and acceleration sensor (Airbag ECU assembly) | Yaw rate and acceleration request signal | CAN communication line |
| Yaw rate and acceleration sensor (Airbag ECU assembly) | Skid control ECU (Brake booster with master cylinder assembly) | Yaw rate and acceleration signal | CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Parking brake ECU (Brake actuator assembly) |
| CAN communication line |
| Parking brake ECU (Brake actuator assembly) | Skid control ECU (Brake booster with master cylinder assembly) |
| CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Combination meter assembly |
| CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Certification ECU (Smart key ECU assembly) |
| CAN communication line |
| Certification ECU (Smart key ECU assembly) | Skid control ECU (Brake booster with master cylinder assembly) | Push start switch signal | CAN communication line |
| Skid control ECU (Brake booster with master cylinder assembly) | Inverter with converter assembly |
| CAN communication line |
| Inverter with converter assembly | Skid control ECU (Brake booster with master cylinder assembly) |
| CAN communication line |
| Airbag ECU assembly | Skid control ECU (Brake booster with master cylinder assembly) | Secondary collision brake request signal | CAN communication line |
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Terminals Of Ecu
TERMINALS OF ECU TERMINALS OF ECU *a Component without harness connected (Skid Control ECU (Brake Booster with Master Cylinder Assembly)) - - Terminal No. (Symbol) Terminal Descripti
Test Mode Procedure
TEST MODE PROCEDURE WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK (a) When the power switch is turned on (IG), check that the ABS warning, brake warning / red (malfunction), brake warning / yellow (
TRAC does not Operate
DESCRIPTION When ABS, TRAC or VSC is operating, the skid control ECU (brake booster with master cylinder assembly) blinks the slip indicator light to inform the driver that slippage occurred. When in
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Pointer Displayed/not Displayed Repeatedly
WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
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When replacing the radio receiver ass
Open in Bus 3 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 6 (CA3H) and 21 (CA3L) of the central
