Lexus ES: Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION
According to the panoramic moon roof switch (map light sub-assembly) operation, the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) operates its built-in motor. Using the panoramic moon roof switch (map light sub-assembly), if the sliding roof glass or roof sunshade can be operated normally when 45 seconds or more have elapsed since the engine switch was turned off, the key-off operation function may be abnormal.
CAUTION / NOTICE / HINT
NOTICE:
-
If the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) must be initialized.
Click here
.gif)
-
The panoramic moon roof system uses the CAN and LIN communication systems. First, confirm that there are no malfunctions in the CAN and LIN communication systems. Refer to How to Proceed with Troubleshooting.
Click here
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
PROCEDURE
| 1. | CHECK POWER WINDOW CONTROL SYSTEM |
(a) Check if the key-off operation function of the power window control system operates normally.
Click here
OK:
The key-off operation function of the power window control system operates normally.
| NG | .gif) | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
.gif)
| 2. | CHECK KEY-OFF OPERATION FUNCTION |
(a) Check the key-off operation function.
Click here
| Result | Proceed to |
|---|---|
| Sliding roof can still be operated even after approximately 45 seconds have elapsed after engine switch is turned off | A |
| Roof sunshade can still be operated even after approximately 45 seconds have elapsed after engine switch is turned off | B |
| A | | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
| B | | REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
READ NEXT:
Panoramic Moon Roof System does not Operate
DESCRIPTION The sliding roof ECU (sliding roof drive gear assembly) and roof sunshade ECU (sliding roof drive gear assembly) receive each other's position information from the main body ECU (multiplex
Components
COMPONENTS ILLUSTRATION *A for Front Side *B for Rear Side *1 FRONT SLIDING ROOF GARNISH LH *2 FRONT SLIDING ROOF GARNISH RH *3 SLIDING ROOF GLASS SUB-ASSEMBLY *4 SLIDING
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT LUGGAGE DOOR OPENING CANCEL SWITCH ASSEMBLY (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Switch Condition Specified Condition 2 (B) - 1 (L) Switch on Below
Open in Bus 3 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 6 (CA3H) and 21 (CA3L) of the central
