Lexus NX: Extension Module Malfunction 2 (B1556)
DESCRIPTION
These DTCs are 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 hard drive malfunction
-
EEPROM error
-
Storage malfunction
| Navigation ECU |
CAUTION / NOTICE / HINT
NOTICE:
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.
Click here
Body Electrical > Navigation System > Clear DTCs
(b) Recheck for DTCs and check that no DTCs are output.
Click here
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
NG | | REPLACE NAVIGATION ECU |
READ NEXT:
DESCRIPTION This DTC is stored if the remote operation controller assembly (remote touch) detects a malfunction in itself, such as internal hardware failure or touch pad sensor malfunction. DTC No.
DESCRIPTION This DTC is stored if the remote operation controller assembly (remote touch) detects a malfunction in itself, such as internal hardware failure or touch pad vibration driver malfunction.
DESCRIPTION This DTC is stored if the remote operation controller assembly (remote touch) detects a malfunction in itself, such as internal hardware failure or touch pad memory module malfunction.
SEE MORE:
For economical and ecological
driving, pay attention to the following
points:
Using Eco mode
When using Eco mode, the torque corresponding
to the accelerator pedal
depression amount can be generated
more smoothly than it is in normal conditions.
In addition, the operation of the
air condi
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect
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