Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

*a

Hybrid Vehicle Control ECU

-

-

HINT:

The standard normal voltage between each pair of hybrid vehicle control ECU terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the hybrid vehicle control ECU terminal locations.

Hybrid Vehicle Control ECU

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

A33-31 (HMCH) - G59-6 (E1)

B - W-B

IN/OUT

CAN communication signal

Power switch on (IG)

Pulse generation

(Waveform 1)

A33-6 (MREL) - G59-6 (E1)

G - W-B

OUT

IGCT relay

Power switch on (IG)

11 to 14 V

A32-17 (LIN3) - G59-6 (E1)

L - W-B

IN/OUT

LIN communication signal

Power switch on (READY)

Pulse generation

A33-30 (HMCL) - G59-6 (E1)

W - W-B

IN/OUT

CAN communication signal

Power switch on (IG)

Pulse generation

(Waveform 1)

(a) Oscilloscope waveforms

HINT:

Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted.

(1) Waveform 1 (CAN communication signal)

Item

Content

Terminal

CH1: A33-31 (HMCH) - G59-6 (E1)

CH2: A33-30 (HMCL) - G59-6 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

READ NEXT:

 How To Proceed With Troubleshooting

PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CONFIRM PROBLEM SYMPTOMS NEXT 3. CUSTOMER PROBLEM ANALYSIS (a) Check if the vehicle has be

 System Diagram

SYSTEM DIAGRAM

 Parts Location

PARTS LOCATION ILLUSTRATION *1 INVERTER WITH CONVERTER ASSEMBLY *2 COMPRESSOR WITH MOTOR ASSEMBLY *3 AUXILIARY BATTERY *4 FUSIBLE LINK BLOCK ASSEMBLY - BATT-S FUSE *5 BATTERY

SEE MORE:

 ABS does not Operate

DESCRIPTION When the electronically controlled brake system is operating, as the input piston and output piston are not directly connected, the kickback of the brake pedal is minimal during ABS operation and the driver may not notice that ABS operated. CAUTION / NOTICE / HINT NOTICE: After replacing

 Engine Coolant Pump Overspeed (P26CE37)

DESCRIPTION Refer to DTC P26CA12. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P26CE37 Engine Coolant Pump Overspeed The speed of the water inlet housing with water pump sub-assembly is a certain value or more when an operation reque

© 2016-2024 Copyright www.lexguide.net