Lexus NX: Voice Guidance does not Function
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.
PROCEDURE
| 1. | CHECK VOICE GUIDANCE SETTING |
(a) Check that the voice guidance settings are not off.
OK:
Voice guidance settings are not off.
| NG | .gif) | CHANGE VOICE GUIDANCE SETTINGS TO ON |
|
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| 2. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) |
(a) Disconnect the I153 radio receiver assembly connector.
(b) Disconnect the I173 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I153-22 (SI+) - I173-6 (VOI+) | Always | Below 1 Ω |
| I153-23 (SI-) - I173-7 (VOI-) | Always | Below 1 Ω |
| I153-22 (SI+) or I173-6 (VOI+) - Body ground | Always | 10 kΩ or higher |
| I153-23 (SI-) or I173-7 (VOI-) - Body ground | Always | 10 kΩ or higher |
| I173-8 (SLD1) - Body ground | Always | 10 kΩ or higher |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
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| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Route cannot be Calculated
PROCEDURE 1. SET DESTINATION (a) Set another destination and check if the system can calculate the route correctly. OK: Route can be correctly calculated. OK NORMAL OPERATION NG
Voice is not Recognized
PROCEDURE 1. CHECK CONDITION (a) While paying attention to the condition of the spoken voice command, perform a voice recognition operation. OK: Voice command is recognized normally. HINT:
Cellular Phone Registration Failure
CAUTION / NOTICE / HINT NOTICE: When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following
SEE MORE:
Terminals Of Ecu
TERMINALS OF ECU CLOCK ASSEMBLY Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I163-1 (ILL-) - Body ground G - Body ground Illumination signal ground Power switch on (ACC) Pulse generation I163-2 (E) - Body ground W-B - Body ground
Lexus Safety System+ 2.0
The Lexus Safety System+ 2.0 consists
of the following drive assist systems
and contributes to a safe and
comfortable driving experience:
Driving assist system
PCS (Pre-Collision System)
LTA (Lane Tracing Assist)
LDA (Lane Departure Alert with
steering control)
Automatic High Beam
