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:
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the power door lock control system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS CHECK HINT:
In troubleshooting, confirm that t
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