Lexus ES manuals

Lexus ES: GPS Antenna Connection Malfunction(short) (B15C0,B15C1)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the navigation antenna assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C0

GPS Antenna Connection Malfunction(short)

GPS Antenna Connection Malfunction (short)

  • Navigation antenna assembly
  • Antenna cord sub-assembly
  • Navigation ECU

B15C1

GPS Antenna Connection Malfunction(break)

GPS Antenna Connection Malfunction (break)

  • Navigation antenna assembly
  • Antenna cord sub-assembly
  • Navigation ECU

WIRING DIAGRAM

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.
  • 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

2.

INSPECT ANTENNA CORD SUB-ASSEMBLY

(a) Remove the antenna cord sub-assembly.

Click here

(b) Measure the resistance according to the value(s) in the table below.

*a

Component without harness connected

(Antenna Cord Sub-assembly)

*a

Component without harness connected

(Antenna Cord Sub-assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A-3 - B-1

Always

Below 1 Ω

A-3a - B-1a

Always

Below 1 Ω

A-3 or B-1 - Body ground

Always

10 kΩ or higher

A-3a or B-1a - Body ground

Always

10 kΩ or higher

NG

REPLACE ANTENNA CORD SUB-ASSEMBLY

OK

3.

INSPECT NAVIGATION ANTENNA ASSEMBLY

(a) Remove the navigation antenna assembly.

Click here

(b) Inspect the navigation antenna assembly.

Click here

OK

REPLACE NAVIGATION ECU

NG

REPLACE NAVIGATION ANTENNA ASSEMBLY

READ NEXT:

 Speed Signal Malfunction (B15C2)

DESCRIPTION The navigation ECU receives a vehicle speed signal from the combination meter assembly and information from the navigation antenna assembly, and then adjusts the vehicle position on the ma

 Speaker Output Short (B15C3)

DESCRIPTION This DTC is stored when a malfunction occurs in the speakers. DTC No. Detection Item DTC Detection Condition Trouble Area B15C3 Speaker Output Short A short is detected in

 MOST Communication Malfunction (B15D0)

DESCRIPTION Navigation system components communicate with each other via MOST communication. If a line short or short to ground occurs in a MOST communication line, communication will not be possible

SEE MORE:

 Open in Bus 1 Main Bus Line

DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central

 Brake Switch "A" Signal Compare Failure (P057162)

DESCRIPTION When the brake pedal is depressed, the stop light switch assembly outputs a signal to the ECM. The ECM uses this signal to control cancellation of vehicle speed by the dynamic radar cruise control. When the ECM determines that terminals STP and ST1 of the stop light switch assembly are b

© 2016-2025 Copyright www.lexguide.net