Lexus ES: Touch Pad Memory Module Malfunction (B155B)
DESCRIPTION
This DTC is stored if the remote touch (remote operation controller assembly) detects a malfunction in itself, such as internal hardware failure or remote touch screen memory module malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B155B | Touch Pad Memory Module Malfunction | Internal memory module malfunction | Remote touch (remote operation controller assembly) |
PROCEDURE
| 1. | CHECK DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK |  | USE SIMULATION METHOD TO CHECK |
|
| 2. | CHECK INFORMATION CODE |
(a) Check that the part number of the remote touch (remote operation controller assembly) is correct.
| Result | Proceed to |
|---|---|
| The part number of the remote touch (remote operation controller assembly) is correct | A |
| The part number of the remote touch (remote operation controller assembly) is incorrect | B |
| B | | REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY) |
|
| 3. | REMOTE TOUCH SELF CHECK (CHECK REMOTE TOUCH SCREEN OPERATION POSITION RECOGNITION CONDITION) |
(a) Enter self-diagnostic mode.
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(b) Operate the remote touch screen laterally and check that the remote touch screen generates vibration feedback.
NOTICE:
Since the remote touch screen may recognize a pinch in/out or flick operation if operated with 2 fingers, always use 1 finger to operate the remote touch screen in self-diagnostic mode.
HINT:
When operating at an excessively low temperature, vibration feedback may be difficult to feel.
| Result | Proceed to |
|---|---|
| Vibration feedback is generated according to remote touch screen operation | A |
| The switch illumination changes but vibration feedback is not generated in accordance to remote touch screen operation | B |
| B | | REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY) |
|
| 4. | CHECK DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs(b) Turn the engine switch off.
(c) Turn the engine switch on (ACC) and wait for 5 seconds.
(d) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
| OK | | USE SIMULATION METHOD TO CHECK |
| NG | | REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY) |
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