Lexus ES: AWD Warning does not Come ON
DESCRIPTION
Refer to "4WD Warning Remains ON".
Click here .gif)
WIRING DIAGRAM
Refer to "4WD Warning Remains ON".
Click here
CAUTION / NOTICE / HINT
Refer to "4WD Warning Remains ON".
Click here
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR |
(a) Check that there is no looseness at the locking and connecting parts of the 4WD ECU assembly connector.
OK:
No looseness at the locking and connecting parts
(b) Disconnect the G131 4WD ECU assembly connector.
(c) Check the connector case and the terminal for deformation and corrosion.
OK:
No deformation or corrosion
(d) Connect the G131 4WD ECU assembly connector.
| NG |  | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 2. | CHECK 4WD WARNING MESSAGE |
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) According to the display on the Techstream, read the Data List.
Chassis > Four Wheel Drive > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| 4WD Warning Light | AWD warning (multi-information display) | Warning ON/OFF | Observe combination meter assembly |
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| 4WD Warning Light | AWD warning (multi-information display) | OFF or ON | OFF: Warning off ON: Warning on | - |
| Active Test Display |
|---|
| 4WD Warning Light |
| Data List Display |
|---|
| 4WD Warning Light |
| Result | Proceed to |
|---|---|
| Data List display does not switch ON/OFF | A |
| Data List display switches ON/OFF | B |
| A | | REPLACE 4WD ECU ASSEMBLY |
| B | | GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
READ NEXT:
AWD Warning Remains ON
DESCRIPTION The 4WD ECU assembly is connected to the combination meter assembly via CAN communication. If the 4WD ECU assembly stores any DTCs which are related to the dynamic torque control AWD syste
Linear Solenoid Power Supply System Malfunction (C120C)
DESCRIPTION This DTC is output by the 4WD ECU assembly if a malfunction occurs in the linear solenoid power supply system. DTC No. Detection Item DTC Detection Condition Trouble Area C120
Low or High Power Supply Voltage (C1241)
DESCRIPTION If a malfunction in the power source circuit occurs, or a malfunction in communication with the skid control ECU (brake actuator assembly) or in a speed sensor occurs, the 4WD ECU assembly
SEE MORE:
Components
COMPONENTS ILLUSTRATION *1 FRONT FENDER APRON SEAL RH *2 V-BANK COVER SUB-ASSEMBLY N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 1) *2 CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY
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 been jump started due to a discharged auxiliary battery. Result Proceed to The vehicle has ne
