Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: GVIF Disconnected (from Park Assist/Monitoring ECU to EMV/MM Integrated Device) (B1574)

Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / GVIF Disconnected (from Park Assist/Monitoring ECU to EMV/MM Integrated Device) (B1574)

DESCRIPTION

The multi-display assembly and parking assist 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

B1574

GVIF Disconnected (from Park Assist/Monitoring ECU to EMV/MM Integrated Device)

GVIF disconnected (from parking assist ECU to multi-display assembly)

  • Harness or connector (GVIF cable)
  • Multi-display assembly
  • Parking assist ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the panoramic view monitor system may be needed.

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PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the engine switch off.

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

(d) Change the shift position to R and check for DTCs.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - PARKING ASSIST ECU)

(a) Disconnect the J171 multi-display assembly connector.

*a

Front view of wire harness connector

(to Multi-display Assembly)

*b

Front view of wire harness connector

(to Parking Assist ECU)

(b) Disconnect the J172 parking assist ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J172-2 (GVO-) - J171-2 (GVI-)

Always

Below 1 Ω

J172-1 (GVO+) - J171-1 (GVI+)

Always

Below 1 Ω

J172-3 (GVG1) - J171-3 (GVG1)

Always

Below 1 Ω

J172-2 (GVO-) or J171-2 (GVI-) - Body ground

Always

10 kΩ or higher

J172-1 (GVO+) or J171-1 (GVI+) - Body ground

Always

10 kΩ or higher

J172-3 (GVG1) or J171-3 (GVG1) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK MULTI-DISPLAY ASSEMBLY

(a) Replace the multi-display assembly with a new or known good one.

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(b) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(c) Turn the engine switch off.

(d) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)

NG

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