Toyota CH-R Service Manual: GVIF Disconnected (from Extension Module to H/U) (B153A)

Toyota CH-R Service Manual / Navigation / Multi Info Display / Navigation System / GVIF Disconnected (from Extension Module to H/U) (B153A)

DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B153A	GVIF Disconnected (from Extension Module to H/U)	GVIF disconnected (from navigation ECU to radio and display receiver assembly)	Harness or connector Navigation ECU Radio and display receiver assembly No. 1 Navigation Wire Antenna Cord Sub-assembly

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 radio and display receiver assembly or navigation ECU, always replace it with a new one. If a radio and display receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly or navigation ECU may not operate normally.

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) Disconnect the GA No. 1 navigation wire connector from the antenna cord sub-assembly.

Front view of wire harness connector

(to Navigation ECU)

Front view of wire harness connector

(to Antenna Cord Sub-assembly)

(b) Disconnect the GU No. 1 navigation wire connector from the navigation ECU.

Standard Resistance:

Tester Connection	Condition	Specified Condition
GU-1 (GV-) - GA-1	Always	Below 1 Ω
GU-2 (GV+) - GA-2	Always	Below 1 Ω
GU-3 (GND) - GA-3	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	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)

5.	REPLACE NAVIGATION ECU

(a) Replace the navigation ECU with a new 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 (NAVIGATION ECU IS DEFECTIVE)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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