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:
Before driving
Observe the following before starting
off in the vehicle to ensure
safety of driving.
Installing floor mats
Use only floor mats designed specifically
for vehicles of the same model
and model year as your vehicle. Fix
them securely in place onto the carpet.
1. Insert the retaining hooks (clip
Fail-safe Chart
FAIL-SAFE CHART FAIL-SAFE FUNCTION (a) When communication fails in any of the CAN bus wires (communication wires), a fail-safe function(s) operates. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning. (b) Effects on each system when communi
