Lexus ES manuals

Lexus ES: Extension Module Malfunction 2 (B1556)

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System (for Gasoline Model) / 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

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 Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE NAVIGATION ECU

READ NEXT:

 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.

 GVIF Disconnected (from Park Assist/Monitoring ECU to EMV/MM Integrated Device) (B1574)

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

 GVIF Disconnected (from EMV/MM Integrated Device to Multi Display) (B1575)

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:

 Dtc Check / Clear

DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data. HINT: DTCs which are stored in the EC

 Navigation Processor Malfunction (B15AD)

DESCRIPTION This DTC is stored when a malfunction occurs in the navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B15AD Navigation Processor Malfunction When either condition below is met: A short to ground, short to +B or open occurs in the gyro signal

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