Repair Procedure
1. How to Check if the Lexus Link System Is FunctioningA. Perform the check when the ignition switch is turned ON (reference). When the ignition switch is turned ON, the LED changes from red to amber to green: each color lasts 1.5 seconds.
If the vehicle has an active Lexus Link account, the LED will stay green. If the vehicle does not have an active account, the LED will turn off. If the LED turns red, a malfunction has occurred somewhere in the system.
B. Performing the diagnosis check (check before and after servicing the Lexus Link system).
a. Diagnosis
I. When the Lexus Link system is on, the ECU continuously checks if the system has any errors. If an error is detected, an audio message will play: "A Lexus Link system error has been detected. Please contact your Lexus dealer."
The message plays only once per ignition cycle.
II. When an error is detected, check the air interface specification sheet for ways to contact the Lexus Link call center. Errors are saved into the ECU nonvolatile memory as a log of past errors. Past and current error codes can be displayed or deleted through the LED illumination pattern codes.
C. Current Error Codes (please perform these checks).
a. To display the current error codes, first turn the ignition switch OFF. Then, hold the "play" button or the "Volume up" button. With the button pressed, turn the ignition switch ON, OFF, ON, OFF and then ON within 15 seconds.
If the operation is successful, the Lexus Link system will communicate its diagnosis message by illuminating all 3 LEDs at the same time. The diagram shows the timing of the 3 LED blinking patterns. If an LED is faulty, an audio message will play: Code one. LED failure."
b. After the LED illumination pattern codes are finished, an audio message will play: "Diagnostics complete." Turning the ignition switch OFF and turning it ON again will erase current error codes.
NOTE:
^ If the "service","emergency", "play" or "volume up" button is stuck, this diagnostic check cannot be made.
^ If the DSP or the microcomputer in the ECU is malfunctioning, the diagnostic audio message may not play.
If the voice message, "System OK" is confirmed, there is no problem with the Lexus Link system. If error codes are displayed, refer to the Technical Information System (TIS): 2004 RX 330 Repair Manual: Diagnostic: Lexus Link System for troubleshooting.
CAUTION:
Turn the ignition switch to the LOCK position and wait for approximately 30 seconds. Then, disconnect the negative (-) terminal cable from the battery and wait for 90 seconds. Then you may start working on the vehicle. Disconnecting the negative (-) terminal cable within 10 seconds after the ignition switch is turned to the LOCK position will activate the Lexus Link system using the back-up battery and cause the system to make an emergency call. Working on the vehicle within 90 seconds after the negative (-) terminal cable is disconnected may (deploy the SRS using the SRS's back-up power source.
HINT:
For details about the removal of each part, refer to the Technical Information System (TIS): 2004 RX 330 Repair Manual.
2. Remove Front Door Scuff Plate LH Using a screwdriver, disengage the 7 claws and 3 clips, and remove the scuff plate.
HINT:
Tape the screwdriver tip before use.
3. Remove Front Door Opening Trim Weatherstrip LH.
4. Remove Rear Door Scuff Plate LH Using the taped screwdriver, disengage the 4 claws and 2 clips, and remove the scuff plate.
5. Remove Rear Door Opening Trim Weatherstrip LH.
6. Remove Center Pillar Garnish Lower LH
A. Remove the floor anchor cover.
B. Remove the bolt and the front seat outer belt on the floor anchor side.
C. Disengage the 2 clips and 3 claws, and remove the center pillar garnish.
7. Remove Rear Seat Side Cover LH
A. Remove bolt and belt assembly on the floor anchor side.
B. Using a clip remover, remove the 2 clips.
C. Using the taped screwdriver, disengage the 4 clips and remove the side cover.
8. Turn Up Deck Board
A. Disengage the clips and turn up the front side of the deck board.
9. Remove Floor Carpet Assembly
A. Remove the 5 clips and turn over the seatback board carpet.
B. Remove the 5 clips.
C. Turn over the floor carpet in the direction indicated by the arrows.
10. Remove Cowl Side Trim LH
A. Using the taped screwdriver, disengage the 2 clips and cowl side trim.
11. Remove Instrument Panel Finish Panel Lower
A. Remove the bolt and screw.
B. Disconnect the hood lock control cable assembly.
C. Disengage the 5 claws and remove the 4 clips and the instrument panel finish panel lower.
D. Disconnect the connectors.
12. Remove Instrument Panel Airbag Assembly Lower No. 1
A. Using a screwdriver, disconnect the airbag connector.
B. Remove the 4 bolts and the instrument panel airbag assembly lower No. 1.
13. Remove Instrument Panel J/B
A. Remove the 3 nuts.
B. Pull the instrument panel J/B so that the repair wire can pass behind the instrument panel J/B.
14. Set Repair Wire To Instrument Panel Set the repair wire to the instrument panel as shown in the illustration.
HINT:
Pass the repair wire under the attachment.
CAUTION:
Be careful not to damage the repair wire.
15. Disconnect Instrument Panel J/B Connector Wire
A. Disconnect the instrument panel J/B connector (1G) from the instrument panel J/B (located below Body ECU).
B. Using a screwdriver, pull up the instrument panel J/B connector lock.
C. Disconnect the instrument panel J/B connector wire (pin 12), as shown in the illustration (grey color).
16. Disconnect Repair Wire Connector Wire
A. Disconnect the connector.
B. Using a screwdriver, pull up the repair wire connector lock.
C. Disconnect the repair wire connector wire (middle wire), as shown in the illustration.
17. Connect Wire
A. Connect the instrument panel J/B connector wire to the repair wire connector, as shown in the illustration.
B. Connect the repair wire connector wire to the instrument panel J/B connector, as shown in the illustration.
C. Connect the connector as shown in the illustration.
D. Disconnect the M8 connector from the Lexus Link ECU and connect the repair wire connector.
E. Plug in the other side of the repair wire connector into the Lexus Link ECU.
18. Fasten Repair Wire
A. Fasten the repair wire to the instrument panel with a cable tie and vinyl tape as shown in the illustration. Attach the cable ties to the white tape and black tape parts of the repair wire.
B. Connect the instrument panel J/B connector to the instrument panel J/B.
19. Cut Cable Tie Cut off the cable tie, as shown in the illustration.
20. Reconnect Negative Battery Terminal.
21. Check SRS Diagnosis
About 6 seconds after turning the ignition switch ON, check that the SRS warning light in the combination meter turns off.
If the SRS warning light flashes or stays ON, the connector could be disconnected or a wire in the wire harness could be broken or short circuited. Check the applicable circuit for the DTC reading (refer to the Repair Manual).
22. Check Lexus Link System.
Check the Lexus link system. See step 1 in this TSB.
23. Install Instrument Panel J/B.
24. Install Instrument Panel Lower.
A. Install the instrument panel airbag assembly lower No. 1 with the 4 bolts.
Torque: 7.6 N.m (78 kgf.cm, 68 in..lbf).
B. Connect the airbag connector and install the clamp.
25. Install Instrument Panel Finish Panel Lower.
26. Install Cowl Side Trim LH.
27. Install Floor Carpet Assembly.
28. Install Deck Board.
29. Install Rear Seat Side Cover LH.
30. Install Center Pillar Garnish Lower LH.
31. Install Rear Door Opening Trim Weatherstrip LH.
32. Install Rear Door Scuff Plate LH.
33. Install Front Door Opening Trim Weatherstrip LH.
34. Install Front Door Scuff Plate LH.
35. Initialize Body System When disconnecting the negative (-) battery terminal, initialize all the systems after the terminal is reconnected. (Refer to the Technical Information System [TIS]: 2004 RX 330 Repair Manual.)