Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: 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) |
|
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 Audio and Visual System.
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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) Press the "MAP" switch and check for DTCs.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK |  | USE SIMULATION METHOD TO CHECK |
|
| 2. | CHECK NO. 1 NAVIGATION WIRE (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) |
| (a) Disconnect the z31 radio receiver assembly connector. |
|
(b) Disconnect the z32 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| z31-1 (GV2-) - z32-1 (GVO-) | Always | Below 1 Ω |
| z31-2 (GV2+) - z32-2 (GVO+) | Always | Below 1 Ω |
| z31-3 (GVG2) - z32-3 (GVG1) | Always | Below 1 Ω |
| NG | | REPLACE NO. 1 NAVIGATION WIRE |
|
| 3. | REPLACE NAVIGATION ECU |
(a) Replace the Navigation ECU with a new or known good one.
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|
| 4. | 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) Press the "MAP" switch and check for DTCs.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK | | END (NAVIGATION ECU IS DEFECTIVE) |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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