Lexus ES manuals

Lexus ES: GVIF Disconnected (from Extension Module to H/U) (B153A)

DESCRIPTION

The radio receiver assembly and navigation ECU are connected via video signal (digital) lines.

This DTC is stored when a video signal (digital) line is disconnected.

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 receiver assembly)

  • No. 1 navigation wire
  • Navigation ECU
  • Radio receiver 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 receiver assembly or navigation ECU, always replace it with a new one. If a radio 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 receiver assembly or navigation ECU may not operate normally.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(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

2.

CHECK NO. 1 NAVIGATION WIRE (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)

(a) Disconnect the I1 radio receiver assembly connector.

*a

Front view of wire harness connector

(to Navigation ECU)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

(b) Disconnect the I2 navigation ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I1-1 (GVIF-) - I2-1 (GVIF-)

Always

Below 1 Ω

I1-2 (GVIF+) - I2-2 (GVIF+)

Always

Below 1 Ω

I1-3 (GND) - I2-3 (GND)

Always

Below 1 Ω

NG

REPLACE NO. 1 NAVIGATION WIRE

OK

3.

REPLACE NAVIGATION ECU

(a) Replace the navigation ECU with a new or known good one.

Click here

NEXT

4.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(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 RECEIVER ASSEMBLY

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