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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Installation
INSTALLATION PROCEDURE 1. INSTALL REAR UPPER CONTROL ARM ASSEMBLY LH (a) Temporarily install the rear upper control arm assembly LH to the rear suspension member sub-assembly with the bolt and nut. NOTICE:
Because the nut has its own stopper, do not turn the nut. Tighten the bolt with the nu
Radio Receiver Assembly Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Radio Receiver Assembly Communication Stop Mode Any of the following conditions are met:
Communication stop for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check" screen of the Techstream.
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Comm
