Lexus ES: 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) |
|
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 power switch off.
(c) Turn the power switch on (IG).
(d) Change the shift position to R and check for DTCs.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK |  | USE SIMULATION METHOD TO CHECK |
|
| 2. | CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - PARKING ASSIST ECU) |
| (a) Disconnect the G100 multi-display assembly connector. |
|
(b) Disconnect the N108 parking assist ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| N108-2 (GV-) - G100-2 (GV-) | Always | Below 1 Ω |
| N108-1 (GV+) - G100-1 (GV+) | Always | Below 1 Ω |
| N108-3 (GND) - G100-3 (GND) | Always | Below 1 Ω |
| N108-2 (GV-) or G100-2 (GV-) - Body ground | Always | 10 kΩ or higher |
| N108-1 (GV+) or G100-1 (GV+) - Body ground | Always | 10 kΩ or higher |
| N108-3 (GND) or G100-3 (GND) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 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 power switch off.
(d) Change the shift position to R and check for DTCs.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK | | END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE) |
| NG | | REPLACE PARKING ASSIST ECU |
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