Lexus ES manuals

Lexus ES: Diagnosis System

Lexus ES (XZ10) Service Manual / Power Source & Network / Networking / Lin Communication System (for Gasoline Model) / Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3).

When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.

CHECK DLC3

(a) Check the DLC3.

Click here

INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery.

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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) Disconnect the MB main body ECU (multiplex network body ECU) connector. Click here

 How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the LIN communication system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT

 System Description

SYSTEM DESCRIPTION LIN COMMUNICATION SYSTEM DESCRIPTION The LIN communication system is used for communication between the components in the tables below. If communication cannot be performed through

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 Terminals Of Ecu

TERMINALS OF ECU *1 Inverter with Converter Assembly HINT: Since the inverter with converter assembly uses waterproof connectors, the voltage and waveforms cannot be inspected directly. Standard voltage readings and waveforms are indicated for reference only. Inverter with Converter Assembl

 Installation

INSTALLATION CAUTION / NOTICE / HINT NOTICE: This procedure includes the installation of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts. Click here PROCEDURE 1. INSTALL O-RING HINT: Perform this procedure only when replacement of the O-ring is nec

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