NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B153A; GVIF Disconnected (from Extension Module to H/U); 2020 - 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 11/2022]

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001GSVT
Model Year Start: 2020	Model: GR Corolla	Prod Date Range: [01/2019 - 11/2022]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B153A; GVIF Disconnected (from Extension Module to H/U); 2020 - 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 11/2022]

DTC

B153A

GVIF Disconnected (from Extension Module to H/U)

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)	Navigation ECU Radio and display receiver assembly Harness or connector

WIRING DIAGRAM

w/ Manual (SOS) Switch

w/o Manual (SOS) Switch

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 MODEL

(a) Choose the model to be inspected.

Result	Proceed to
w/ Manual (SOS) Switch	A
w/o Manual (SOS) Switch	B

B

A

2.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Press the "MAP" switch and check for DTCs.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

(a) Disconnect the t3 navigation ECU connector.

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

*b

Front view of wire harness connector

(to Navigation ECU)

(b) Disconnect the t4 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
t3-1 (GVO-) - t4-1 (GV2-)	Always	Below 1 Ω
t3-2 (GVO+) - t4-2 (GV2+)	Always	Below 1 Ω
t3-3 (GVG1) - t4-3 (GVG2)	Always	Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.	REPLACE NAVIGATION ECU

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

Click here

NEXT

5.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Press the "MAP" switch and check for DTCs.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END (NAVIGATION ECU IS DEFECTIVE)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

6.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Press the "MAP" switch and check for DTCs.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

7.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

(a) Disconnect the s1 navigation ECU connector.

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

*b

Front view of wire harness connector

(to Navigation ECU)

(b) Disconnect the s2 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
s1-1 (GVO-) - s2-1 (GV2-)	Always	Below 1 Ω
s1-2 (GVO+) - s2-2 (GV2+)	Always	Below 1 Ω
s1-3 (GVG1) - s2-3 (GVG2)	Always	Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.	REPLACE NAVIGATION ECU

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

Click here

NEXT

9.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Press the "MAP" switch and check for DTCs.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END (NAVIGATION ECU IS DEFECTIVE)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY