Lexus NX: Extension Module Malfunction 2 (B1556)
Lexus NX Service Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / 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 | When any of the following conditions is met:
| Navigation ECU |
CAUTION / NOTICE / HINT
NOTICE:
When replacing the navigation ECU, always replace it with a new one.
If a navigation ECU which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The navigation ECU may not operate normally.
PROCEDURE
| 1. | CHECK DTC |
(a) Clear the DTCs.
Click here .gif)
(b) Recheck for DTCs and check that no DTCs are output.
Click here
OK:
No DTCs are output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
| NG | | REPLACE NAVIGATION ECU |
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Touch Pad Vibration Driver Malfunction (B155A)
DESCRIPTION This DTC is stored if the remote operation controller assembly (remote touch) detects a malfunction in itself, such as internal hardware failure or touch pad vibration driver malfunction.
Touch Pad Memory Module Malfunction (B155B)
DESCRIPTION This DTC is stored if the remote operation controller assembly (remote touch) detects a malfunction in itself, such as internal hardware failure or touch pad memory module malfunction.
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Rear Door LH Entry Lock Function does not Operate
DESCRIPTION If the entry lock function does not operate for the rear door LH only, but the entry unlock function operates, the request code is being transmitted properly from the rear door LH. In this case, there may be a problem related to the lock sensor (connection between the certification ECU (
Inspection
INSPECTION PROCEDURE 1. INSPECT NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY (a) Turn the roller by hand and check that it turns smoothly. If the roller does not turn smoothly, replace the No. 1 valve rocker arm sub-assembly. 2. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOTICE:
Keep the adjuster free from dirt
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