Lexus NX: Pointer Displayed/not Displayed Repeatedly
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
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. | CONFIRM SYMPTOMS |
(a) Recheck the situation when the malfunction occurs.
HINT:
- When a hand is rested on the remote touch screen while driving, the remote touch may react to finger movements and repeatedly display and hide the pointer.
- When accelerating excessively on rough roads, the remote touch may react to the acceleration and repeatedly display and hide the pointer.
| Result | Proceed to |
|---|---|
| Symptom occurs in any situation. | A |
| Symptom occurs when hand is rested on the remote touch screen while driving. | B |
| Symptom occurs when accelerating excessively on rough roads. | C |
| B | .gif) | END |
| C | | GO TO STEP 5 |
|
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| 2. | CHECK FOR FOREIGN MATTER |
(a) Check if there is any foreign matter around the remote touch screen that interferes with operation of the screen.
OK:
There is no foreign matter around the remote touch screen that interferes with operation of the screen.
| NG | | REMOVE FOREIGN MATTER (CHECK OPERATION AGAIN) |
|
| 3. | REMOTE TOUCH SELF CHECK (CHECK TOUCH SCREEN OPERATION POSITION RECOGNITION CONDITION) |
(a) Enter self-diagnostic mode.
Click here
| (b) Operate the remote touch screen diagonally from the upper left to the lower right and check that the brightness of the switch illumination changes. NOTICE: Since the remote touch screen may recognize a pinch in/out operation if operated with 2 fingers, always use 1 finger to operate the remote touch in self-diagnostic mode. OK: Brightness changes according to touch screen operation.
HINT: When the switch illumination blinks, the remote touch has stored a DTC. |
|
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| B | | REPLACE REMOTE OPERATION CONTROLLER ASSEMBLY (REMOTE TOUCH) |
|
| 4. | REPLACE NAVIGATION ECU |
(a) Replace the navigation ECU with a new one.
Click here
(b) Check the malfunction disappears.
OK:
Malfunction disappears.
| OK | | END (NAVIGATION ECU IS DEFECTIVE) |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
| 5. | CHECK CONNECTOR CONNECTION CONDITION |
(a) Check if the P69 remote operation controller assembly (remote touch) connector is securely connected.
OK:
The connector is securely connected.
| NG | | SECURELY CONNECTED |
|
| 6. | CHECK HARNESS AND CONNECTOR (REMOTE OPERATION CONTROLLER ASSEMBLY [REMOTE TOUCH] - BATTERY AND BODY GROUND) |
(a) Disconnect the remote operation controller assembly (remote touch) connector.
| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
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(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I71-1 (+B) - Body ground | Power switch off | 11 to 14 V |
| I71-6 (ACC) - Body ground | Power switch on (ACC) | 11 to 14 V |
| OK | | REPLACE REMOTE OPERATION CONTROLLER ASSEMBLY (REMOTE TOUCH) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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