Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CHECK SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
| *a | Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) | - | - |
(a) Disconnect the A40 skid control ECU (brake actuator assembly) connector.
(b) Measure the voltage and resistance according to the value (s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A40-30 (+BS) - Body ground | G - Body ground | Parking brake motor power supply | Always | 11 to 14 V |
| A40-36 (IG1) - Body ground | B - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
| A40-46 (GND1) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| A40-14 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| A40-2 (MRR+) - Body ground | Y - Body ground | Parking brake motor RH (parking brake actuator assembly RH) (+) | - | - |
| A40-3 (MRR-) - Body ground | L - Body ground | Parking brake motor RH (parking brake actuator assembly RH) (-) | - | - |
| A40-13 (MRL+) - Body ground | G - Body ground | Parking brake motor LH (parking brake actuator assembly LH) (+) | - | - |
| A40-12 (MRL-) - Body ground | W - Body ground | Parking brake motor LH (parking brake actuator assembly LH) (-) | - | - |
| A40-31 (SWI1) - Body ground | P - Body ground | Electric parking brake switch assembly | - | - |
| A40-32 (SWO1) - Body ground | SB - Body ground | Electric parking brake switch assembly | - | - |
| A40-15 (SWI2) - Body ground | W - Body ground | Electric parking brake switch assembly | - | - |
| A40-16 (SWO2) - Body ground | V - Body ground | Electric parking brake switch assembly | - | - |
| A40-5 (CANH) - Body ground | Y - Body ground | CAN communication line H | - | - |
| A40-19 (CANL) - Body ground | W - Body ground | CAN communication line L | - | - |
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Test Mode Procedure
TEST MODE PROCEDURE REAR BRAKE PAD REPLACEMENT MODE *1 Rear Disc Brake Piston *2 Nut *a The nut moves inward in pad replacement mode HINT: When replacing the rear disc brake pad a
Vehicle Control History
VEHICLE CONTROL HISTORY DESCRIPTION
Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior.
If the customer states that the engine sta
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Taillight Relay Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
Before replacing the main body ECU (multiplex net
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
The engine coolant temperature
gauge is in the red zone
or a loss of hybrid system power is
experienced. (For example, the
vehicle speed does not increase.)
"Engine Coolant Temp High Stop
in a Safe Place See Owner's
Manu
