Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

HINT:

Check from the rear of the connector while it is connected to the components.

DCM (TELEMATICS TRANSCEIVER)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G128-1 (+B) - G128-20 (E)

GR - W-B

Power source (+B)

Power switch off

11 to 14 V

G128-20 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G128-19 (IG2) - G128-20 (E)

P - W-B

Power source (IG)

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

G128-25 (CANP)

R

CAN communication signal

-

-

G128-26 (CANN)

W

CAN communication signal

-

-

G128-30 (SLPD) - G128-20 (E)

SB - W-B

Steering lock bar position signal

Steering locked

11 to 14 V

Steering unlocked

Below 1.5 V

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC No. Detection Item DTC Detection Condition Trouble Area U014087 Lost Communication with

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UTILITY CANCEL COMMUNICATION FUNCTION PAUSING HINT: This function is used to cancel communication function pausing mode. (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c)

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PROCEDURE 1. CHECK PROBLEM SYMPTOM (WARNING NOTIFICATION FUNCTION) (a) Check the problem symptom. (1) Check the problem symptom of the warning notification function. Result Proceed to

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 ECM Communication (C124A00)

DESCRIPTION If the vehicle information stored by the skid control ECU (brake actuator assembly) does not match that sent from the ECM or a new skid control ECU (brake actuator assembly) is installed and the vehicle information has not been stored, this DTC is stored. DTC No. Detection Item DT

 Thermostat Heater Control Circuit Short to Battery (P059712)

DESCRIPTION An electric heater is equipped to the temperature sensing portion of the thermostat. During normal driving, current does not flow to the heater and the thermostat functions as an ordinary thermostat. When the temperature of the engine increases by a large amount such as during high-load

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