Lexus ES: Cancellation of 4WD Control (C1299)
DESCRIPTION
This DTC is output if the heat generated by the transmission coupling assembly exceeds a certain amount or if the estimated oil temperature of the transfer exceeds a certain amount while driving.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1299 | Cancellation of 4WD Control | The heat generated by the differential coupling exceeds a certain amount. |
|
PROCEDURE
| 1. | CHECK VEHICLE USAGE |
(a) Check that there has been no unintended vehicle usage.
OK:
There is no evidence of rough use (the vehicle has not been driven on damaged or snowy roads, etc. for a long time).
| NG | .gif) | CHECK FOR INTERMITTENT PROBLEMS |
|
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| 2. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Check if the electronically controlled brake system DTC is output.
Chassis > Brake/EPB > Trouble Codes(e) Read the DTCs using the Techstream.
| Result | Proceed to |
|---|---|
| Only DTC C1299 is output | A |
| DTC C1299 and other DTCs (electronically controlled brake system DTC) are output | B |
| B | | REPAIR CIRCUIT INDICATED BY OUTPUT CODE (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) |
|
| 3. | CHECK RELATED PART |
(a) Check the condition, size and tire pressure of the front and rear tires.
Click here .gif)
(b) Inspect the suspension and ball joint, etc. for rattle.
(c) Inspect the drive shaft and propeller shaft rotation condition.
| NG | | REPAIR OR REPLACE MALFUNCTIONING PARTS |
|
| 4. | RECONFIRM DTC |
(a) Clear the DTC.
Chassis > Four Wheel Drive > Clear DTCs(b) Start the engine.
(c) Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output.
Chassis > Four Wheel Drive > Trouble Codes| Result | Proceed to |
|---|---|
| DTC is output | A |
| DTC is not output | B |
| B | | CHECK FOR INTERMITTENT PROBLEMS |
|
| 5. | REPLACE 4WD ECU ASSEMBLY |
(a) Replace the 4WD ECU assembly.
Click here
|
| 6. | RECONFIRM DTC |
(a) Clear the DTC.
Chassis > Four Wheel Drive > Clear DTCs(b) Start the engine.
(c) Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output.
Chassis > Four Wheel Drive > Trouble Codes| Result | Proceed to |
|---|---|
| DTC is output | A |
| DTC is not output | B |
| A | | REPLACE TRANSMISSION COUPLING ASSEMBLY |
| B | | END |
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