Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CHECK PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)
| *a | Front view of wire harness connector (to Parking Brake ECU (Brake Actuator Assembly)) | - | - |
(a) Disconnect the A54 parking brake 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 |
|---|---|---|---|---|
| A54-9 (BEPB) - Body ground | R - Body ground | Parking brake power supply | Power switch off | 11 to 14 V |
| A54-26 (IG) - Body ground | B - Body ground | IG power supply | Power switch on (IG) | 8 to 16 V |
| A54-2 (EGND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| A54-14 (SWI1) - Body ground | P - Body ground | Electric parking brake switch assembly | - | - |
| A54-24 (SWI2) - Body ground | W - Body ground | Electric parking brake switch assembly | - | - |
| A54-20 (SWO1) - Body ground | SB - Body ground | Electric parking brake switch assembly | - | - |
| A54-22 (SWO2) - Body ground | V - Body ground | Electric parking brake switch assembly | - | - |
| A54-4 (MRR+) - Body ground | LA-Y - Body ground | Parking brake motor RH (parking brake actuator assembly RH) (+) | - | - |
| A54-3 (MRR-) - Body ground | LA-L - Body ground | Parking brake motor RH (parking brake actuator assembly RH) (-) | - | - |
| A54-7 (MRL+) - Body ground | LA-G - Body ground | Parking brake motor LH (parking brake actuator assembly LH) (+) | - | - |
| A54-8 (MRL-) - Body ground | LA-W - Body ground | Parking brake motor LH (parking brake actuator assembly LH) (-) | - | - |
| A54-27 (SPD) - Body ground | L - Body ground | Vehicle speed direct input | - | - |
| A54-12 (CANH) - Body ground | B - Body ground | CAN communication line H | - | - |
| A54-11 (CANL) - Body ground | W - Body ground | CAN communication line L | - | - |
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Test Mode Procedure
TEST MODE PROCEDURE *1 Rear Disc Brake Piston *2 Nut *a The nut moves inward in pad replacement mode REAR BRAKE PAD REPLACEMENT MODE HINT: When replacing the rear disc brake pad a
Control Module Communication Bus OFF (U0073,U0100,U0124,U0129,U0293)
DESCRIPTION The parking brake ECU (brake actuator assembly) communicates with the hybrid vehicle control ECU assembly, skid control ECU (brake booster with master cylinder assembly) and deceleration s
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Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Click here (b) Measure the resistance according to the value(s) in the table
Radio Broadcast cannot be Received or Poor Reception
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 assembly, always re
