Lexus ES: 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: -
Internal power supply malfunction
-
Internal hard drive malfunction
-
EEPROM error
-
Storage malfunction
| 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 Navigation System.
Click here
-
When replacing the navigation ECU, always replace it with a new one. If a navigation ECU which was installed to another vehicle is used, the following may occur:
-
A communication malfunction DTC may be stored.
-
The navigation ECU may not operate normally.
PROCEDURE
(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 Codes
OK:
No DTCs are output.
OK | | USE SIMULATION METHOD TO CHECK |
READ NEXT:
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DESCRIPTION The multi-display assembly and parking assist ECU are connected via video signal (digital) lines. This DTC is stored when a video signal (digital) line is disconnected. DTC No. Detect
DESCRIPTION The radio receiver assembly and multi-display assembly are connected via video signal (digital) lines. This DTC is stored when a video signal (digital) line is disconnected. DTC No. D
SEE MORE:
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever DTCs are detected, the blind spot monitor sensor stores the current vehicle (sensor) state as freeze frame data. CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the blind spot monitor system
COMPONENTS ILLUSTRATION *A w/ Stud Bolt - - *1 VALVE SPRING RETAINER LOCK *2 VALVE SPRING RETAINER *3 INNER COMPRESSION SPRING *4 INTAKE VALVE STEM OIL SEAL *5 VALVE SPRING SEAT *6 INTAKE VALVE GUIDE BUSH *7 SPARK PLUG TUBE *8 INTAKE MANIFOLD TO CYLI
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