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.

    Click here

  • 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

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. 1 NAVIGATION WIRE

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

*a

Front view of wire harness connector

(to Navigation ECU)

*b

Front view of wire harness connector

(to Antenna Cord Sub-assembly)

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

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

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
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

REPLACE ANTENNA CORD SUB-ASSEMBLY

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

Click here

NEXT

4.

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

END (ANTENNA CORD SUB-ASSEMBLY IS DEFECTIVE)
NG

5.

REPLACE NAVIGATION ECU

(a) Replace the navigation ECU with a new one.

Click here

NEXT

6.

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

END (NAVIGATION ECU IS DEFECTIVE)
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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