Lexus NX: GVIF Disconnected (from Extension Module to H/U) (B153A)
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 receiver assembly) |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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.
HINT:
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.
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PROCEDURE
| 1. | CHECK DTC |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
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| 2. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) |
| (a) Disconnect the z15 navigation ECU connector. |
|
(b) Disconnect the z14 radio receiver assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| z15-1 (GVO-) - z14-1 (GV2-) | Always | Below 1 Ω |
| z15-2 (GVO+) - z14-2 (GV2+) | Always | Below 1 Ω |
| z15-3 (GVG1) - z14-3 (GVG2) | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
| 3. | REPLACE NAVIGATION ECU |
(a) Replace the Navigation ECU with a new one.
Click here
|
| 4. | CHECK DTC |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK | | END (NAVIGATION ECU IS DEFECTIVE) |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
READ NEXT:
Extension Module Disconnected 2 (B1543)
DESCRIPTION If the radio receiver assembly cannot detect the navigation ECU for a certain period of time (90 seconds) after the power switch is turned on (ACC) and the radio receiver assembly confirms
HD Radio Tuner Malfunction (B1551,B15A0,B15B3,B15B5,B15B7,B15BA,B15F9)
DESCRIPTION These DTCs are stored when a malfunction occurs in the radio receiver assembly DTC No. Detection Item DTC Detection Condition Trouble Area B1551 HD Radio Tuner Malfunction
Extension Module Malfunction 2 (B1556)
DESCRIPTION These DTCs are stored when a malfunction occurs in the Navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B1556 Extension Module Malfunction 2 Whe
SEE MORE:
Power Switch Illumination Circuit
DESCRIPTION The illuminated entry system controls the power switch illumination. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is replace
Power Seat Position is not Memorized
DESCRIPTION The main body ECU (multiplex network body ECU) receives seat memory switch signals from the outer mirror control ECU assembly (for Driver Side) via CAN communication. If the seat memory SET switch is being pressed when one of the M1, M2 or M3 switches is pressed, or if one of the M1, M2
