Lexus NX manuals

Lexus NX: Extension Module Malfunction 2 (B1556)

Lexus NX Service Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / 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

1.

CHECK DTC

(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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE NAVIGATION ECU

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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.

 Touch Pad Memory Module Malfunction (B155B)

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:

 Adjustment

ADJUSTMENT CAUTION / NOTICE / HINT NOTICE: If a wheel alignment has been performed, or if suspension or underbody components have been removed/installed or replaced, be sure to perform the following initialization procedure in order for the system to function normally: Perform zero point calibrat

 Removal

REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE SIDE MUDGUARD SUB-ASSEMBLY LH HINT: When removing the side mudguard sub-assembly LH, if the No. 3 moulding tape (double-sided tape) is diff

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