Lexus ES: AWD Warning does not Come ON
DESCRIPTION
Refer to "4WD Warning Remains ON".
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WIRING DIAGRAM
Refer to "4WD Warning Remains ON".
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CAUTION / NOTICE / HINT
Refer to "4WD Warning Remains ON".
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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) |
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Removal
REMOVAL CAUTION / NOTICE / HINT NOTICE: This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts. Click here PROCEDURE 1. REMOVE FRONT FENDER APRON SEAL RH Click here 2. REMOVE OIL PRESSURE CONTROL VALVE ASSEMBLY
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