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 > Blind Spot Monitor System: Blind Spot Monitor Slave Module (C1AB7)
DESCRIPTION This DTC is stored when the blind spot monitor sensor RH detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area C1AB7 Blind Spot Monitor Slave Module The blind spot monitor sensor RH (slave) detects an internal malfunction Blind sp ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Door Lock Control System: All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch
DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the power window regulator switch assembly on the front passenger door and activates the door lock motor on each door according to these signals. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Before replacin ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
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- Instrument cluster
- Operation of each component
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- When trouble arises
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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