Toyota Avalon Service & Repair Manual: 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)

Navigation antenna malfunction

  • Navigation antenna assembly
  • No. 4 antenna cord sub-assembly
  • No. 5 antenna cord sub-assembly
  • Navigation ECU

B15C1

GPS Antenna Connection Malfunction(break)

Navigation antenna power source malfunction

  • Navigation antenna assembly
  • No. 4 antenna cord sub-assembly
  • No. 5 antenna cord sub-assembly
  • Navigation ECU

WIRING DIAGRAM

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.
  • Check that the No. 4 antenna cord sub-assembly and No. 5 antenna cord sub-assembly is properly installed and does not have any sharp bends, pinching or loose connections before performing following procedure.

    Click here

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 NO. 5 ANTENNA CORD SUB-ASSEMBLY

(a) Remove the No. 5 antenna cord sub-assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C-1 - D-1

Always

Below 1 Ω

C-1a - D-1a

Always

Below 1 Ω

C-1 or D-1 - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(No. 5 Antenna Cord Sub-assembly)

NG

REPLACE NO. 5 ANTENNA CORD SUB-ASSEMBLY

OK

3.

INSPECT NO. 4 ANTENNA CORD SUB-ASSEMBLY

(a) Remove the No. 4 antenna cord sub-assembly.

Click here

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

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

Component without harness connected

(No. 4 Antenna Cord Sub-assembly)

NG

REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY

OK

4.

INSPECT NAVIGATION ANTENNA ASSEMBLY

(a) Remove the navigation antenna assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 3a

Always

50 to 500 Ω

*a

Component without harness connected

(Navigation Antenna Assembly)

OK

REPLACE NAVIGATION ECU

NG

REPLACE NAVIGATION ANTENNA ASSEMBLY

    Navigation Processor Malfunction (B15AD)

    Speed Signal Malfunction (B15C2)

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