Lexus ES: IG Power Source Circuit
DESCRIPTION
When the power switch is turned on (IG), the IG power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY) |
| (a) Disconnect the G63 multiplex tilt and telescopic ECU connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G63-10 (IG) - Body ground | Power switch on (IG) | 11 to 14 V |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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| 2. | CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND) |
| (a) Disconnect the G63 multiplex tilt and telescopic ECU connector. |
|
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G63-1 (GND) - Body ground | Always | Below 1 Ω |
| G63-8 (GND2) - Body ground | Always | Below 1 Ω |
| OK | | REPLACE MULTIPLEX TILT AND TELESCOPIC ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the c
Parts Location
PARTS LOCATION ILLUSTRATION *1 TILT AND TELESCOPIC SWITCH *2 STEERING COLUMN ASSEMBLY - TILT MOTOR - TELESCOPIC MOTOR *3 NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY
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Hydraulic Test
HYDRAULIC TEST PERFORM HYDRAULIC TEST CAUTION:
Do not perform a stall test if there are any people or objects near the vehicle.
The vehicle could begin moving suddenly, resulting in a serious accident.
Do not perform a stall test if any wheel chocks are out of position.
The vehicle co
Terminals Of Ecu
TERMINALS OF ECU NOTICE:
Turning the power switch on (IG) with connectors disconnected may cause DTCs to be stored. Make sure to clear the DTCs after inspection has been performed.
Do not apply excessive force to the millimeter wave radar sensor assembly connector.
CHECK MILLIMETER WAVE RAD
