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.
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(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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