Communication System: Diagnosis Lexus RX II

PROBLEM SYMPTOMS TABLE

PROBLEM SYMPTOMS REFERENCE

Scheme 277

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Scheme 279

1. INSPECT LOW PITCHED HORN ASSY Check operation of the horn. HORN SPECIFICATION Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery negative (-) --> Horn body Horn sounds If the result is not as specified, replace the horn assy.
2. INSPECT HIGH PITCHED HORN ASSY Check operation of the horn. HORN SPECIFICATION Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery negative (-) --> Horn body Horn sounds If the result is not as specified, replace the horn assy.
3. INSPECT HORN RELAY ASSY Remove the horn relay from the engine room R/B No. 2. Inspect the horn relay resistance. Standard: TESTER SPECIFICATION Tester Connection Specified Condition 3 - 5 10 kohm or higher Below 1 ohm (When battery voltage is applied to terminals 1 and 2) If the result is not as specified, replace the relay assy.

Scheme 280

1. REMOVE LOW PITCHED HORN ASSY Disconnect the connector. Remove the bolt and horn.
2. INSTALL LOW PITCHED HORN ASSY Place the stay onto the baffle part in the radiator support upper and then install the horn with the bolt. Torque: 20 N.m (204 kgf.cm, 15 ft.lbf) Connect the connector.

Scheme 281

1. REMOVE HIGH PITCHED HORN ASSY Disconnect the connector. Remove the bolt and horn.
2. INSTALL HIGH PITCHED HORN ASSY Place the stay onto the baffle part in the radiator support upper and then install the horn with the bolt. Torque: 20 N.m (204 kgf.cm, 15 ft.lbf) Connect the connector.

Scheme 282

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Scheme 286

1. RESISTER TRANSMITTER CODE HINT: The garage door opener is built into the dome lamp No. 1. When the transmitter codes for garage door, gate, entry gate, door lock, home lighting system or security system are registered with the garage door opener, be sure to register them again whenever replacing the dome lamp No. 1. After the dome lamp No. 1 has been replaced, register the transmitter codes with the garage door opener (Registration mode). NOTE: While the transmitter code for a system (garage, door, gate, etc.) is being registered, the system may operate. During code registration and while the system is in operation, be sure that no people or objects are in the way. Be sure to stop the engine and remove the key from the ignition switch before the transmitter code registration. The garage door opener does not apply to systems manufactured before April 1,1982 and systems that do not comply with the Federal Safety Standards. Garage doors without the jam protection function do not meet the Federal Safety Standards. HINT: Every one of the garage door opener switches can have only 1 transmitter code; total 3 transmitter codes can be registered with the garage door opener. Even if the battery is disconnected, the transmitter codes registered with the garage door opener will not be erased. Even if you attempt to rewrite the transmitter code registered with the garage door opener and the at tempt has failed, the registered transmitter code will not be erased. Select a switch of the garage door opener for the transmitter code registration. Press and hold the selected switch for 20 seconds. Then, the garage door opener enters registration mode. HINT: When the garage door opener is in registration mode, the LED changes from ON to flashing at a cycle of 1 Hz. (In the case of the "rolling code" type, the LED will flash at a cycle of 8.8 Hz for 1.6 seconds at first and then change the flash cycle to 1 Hz after the garage door opener has entered registration mode.) After the garage door opener has entered registration mode, bring the original transmitter of the system within 1- inch of the garage door opener while pressing the switch of the garage door opener. Under this condition, press the original transmitter. When the transmitter code registration has been completed correctly, the LED of the garage door opener flashes at a cycle of 5.6 Hz. When this happens, release both the switch and the original transmitter. HINT: If the code registration has failed, the battery of the original transmitter may be weak or the system may not meet the garage door opener. In this case, press the original transmitter repeatedly. Some transmitters may need 1 to 2 seconds to stop transmitting signals. If the transmitter code registration has not been completed in 90 seconds after the garage door opener 1 has entered registration mode, the garage door opener will enter low power mode (See step c ). Timing Chart of Registration Mode: Erase the transmitter codes (Clear mode). HINT: All the transmitter codes registered in the garage door opener are erased at the same time (maximum 3 codes). If the switches are released within 10 seconds after the transmitter codes have been erased, the garage door opener will enter registration mode. If the switches are held for 10 seconds or more after the transmitter codes have been erased, default codes will be set to all the 3 switches of the garage door opener. With this default code, you can check operation of the garage door opener using a tester. Press and hold the 2 switches at both ends of the garage door opener simultaneously for 20 seconds. Then, the LED starts flashing at a cycle of 5.6 Hz. Releasing the switches will end clear mode. Timing Chart of Clear Mode: Low power mode: If the switch of the garage door opener is held for 75 seconds or more, the garage door opener will enter low power mode to economize the power consumption. When the garage door opener has entered low power mode, the LED goes off.

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Scheme 289

1. INSPECT GARAGE DOOR OPENER Press the switch and check that each LED (red) lights up. Even if only one switch is found not to light up, replace the garage door opener.
2. INSPECT GARAGE DOOR OPENER REGISTRATION AND TRANSMITTING HINT: Use the home link tester made by KENT MORE for this test. Because it is necessary to register the code of the hand-held transmitter, the customer's code should be erased. When the inspection is complete, register the customer's code again. Check that the code of the hand-held transmitter for inspection can be registered. HINT: If the code can not be registered, replace the garage door opener. Press the switch which inspection code has been registered for and check that LED (green) of the home link tester lights up. HINT: If the LED (green) does not light up, replace the garage door opener.