Toyota CH-R Service Manual: GPS Antenna Connection Malfunction(short) (B15C0,B15C1)

Toyota CH-R Service Manual / Navigation / Multi Info Display / Navigation System / 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 Antenna cord sub-assembly Navigation ECU
B15C1	GPS Antenna Connection Malfunction(break)	Navigation antenna power source malfunction	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.
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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 is stored.
- The radio and display receiver assembly may not operate normally.
Check that the antenna cord sub-assembly is properly installed and does not have any sharp bends, pinching or loose connections before performing following procedure.
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PROCEDURE

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.

USE SIMULATION METHOD TO CHECK

2.	INSPECT NO. 1 NAVIGATION WIRE

(a) Remove the No. 1 navigation wire.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
GA-1 - GB-1	Always	Below 1 Ω
GA-1a - GB-1a	Always	Below 1 Ω
GA-1 or GB-1 - Body ground	Always	10 kΩ or higher

*a	Component without harness connected (No. 1 Navigation Wire)

REPLACE NO. 1 NAVIGATION WIRE

3.	INSPECT NAVIGATION ANTENNA ASSEMBLY

(a) Remove the navigation antenna assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 1a	Always	50 to 500 Ω

*a	Component without harness connected (Navigation Antenna Assembly)

REPLACE NAVIGATION ANTENNA ASSEMBLY

4.	REPLACE ANTENNA CORD SUB-ASSEMBLY

(a) Replace the antenna cord sub-assembly with a new or known good one.

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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.

END (ANTENNA CORD SUB-ASSEMBLY IS DEFECTIVE)

REPLACE NAVIGATION ECU

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 t ...

Navigation Processor Malfunction (B15AD)

DESCRIPTION These DTCs are stored when a malfunction occurs in the navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area ...

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