Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Extension Module Malfunction 2 (B1556)
DESCRIPTION
This DTC is stored when a malfunction occurs in the Navigation ECU.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1556 | Extension Module Malfunction 2 | When any of the following conditions is met:
| Navigation ECU |
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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PROCEDURE
| 1. | CHECK DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK |  | USE SIMULATION METHOD TO CHECK |
| NG | | REPLACE NAVIGATION ECU |
HD Radio Tuner Malfunction (B1551,B15A0,B15B3-B15B5,B15B7,B15F9)
DESCRIPTION These DTCs are stored when a malfunction occurs in the radio receiver assembly. DTC No. Detection Item DTC Detection Condition Trouble Area B1551 HD Radio Tuner Malfunction ...
Touch Pad Sensor Malfunction (B1559)
DESCRIPTION This DTC is stored if the remote touch (remote operation controller assembly) detects a malfunction in itself, such as internal hardware failure or remote touch screen sensor malfunction. ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Radio Receiver: Installation
INSTALLATION PROCEDURE 1. INSTALL RADIO RECEIVER ASSEMBLY 2. INSTALL NAVIGATION ECU (w/ Navigation ECU) 3. INSTALL NO. 2 RADIO BRACKET (a) w/o Navigation ECU: (1) Install the No. 2 radio bracket with the 3 screws. (b) w/ Navigation ECU: (1) Install the No. 2 radio bracket with the 5 screws. (c) Enga ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Curtain Shield Airbag Assembly (w/o Rear No. 2 Seat): Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL CURTAIN SHIELD AIRBAG ASSEMBLY NOTICE: When installing a curtain shield airbag assembly, have assistants hold it to prevent it from ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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