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.
Click here .gif)
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 |
|
.gif)
| 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:
Open or Short Circuit in Release Switch Circuit (C13A4,C13AC)
DESCRIPTION When the electric parking brake switch (integration control and panel assembly) is pushed to the release side, a release request signal is output to the parking brake ECU assembly. DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note C13A4 Open or Sh
Cooling System
DESCRIPTION The cause of the malfunction may be the cooling system. Check whether the grille is blocked, whether coolant is leaking, the HV radiator fan operating condition and whether coolant has frozen. Related Parts Check Area Inspection Step Grille blockage, coolant amount, coolant ho
