Lexus NX: Vehicles Speed Malfunction (B2624)
DESCRIPTION
The multiplex tilt and telescopic ECU forms a network with the ECUs of other systems via CAN communication. Each ECU informs the other ECUs that it is connected to the network by sending a specified signal (periodic signal) onto the communication bus on a regular basis. The multiplex tilt and telescopic ECU receives vehicle speed signals from the combination meter assembly via the CAN communication bus to prevent improper operation of the auto away/return function while driving.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2624 | Vehicles Speed Malfunction |
|
|
PROCEDURE
| 1. | CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM) |
(a) Check for DTCs.
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OK:
DTCs are not output.
| NG | .gif) | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
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| 2. | READ VALUE USING TECHSTREAM (FREEZE SPEED INFO) |
(a) Turn the power switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Check the vehicle speed signal on the Techstream.
(f) Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.
Body Electrical > Tilt&Telescopic > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Freeze Speed Info | Vehicle speed data | Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph) | Actual vehicle speed | - |
| Tester Display |
|---|
| Freeze Speed Info |
| Result | Proceed to |
|---|---|
| Values indicated on the Techstream are normal. | A |
| Values indicated on the Techstream are abnormal. | B |
HINT:
A vehicle speed of 3 km/h (2 mph) or more may be displayed on the Techstream immediately after the vehicle comes to a sudden stop. This is caused by a delay in vehicle signal received via CAN communication and is not a malfunction.
| A | | REPLACE MULTIPLEX TILT AND TELESCOPIC ECU |
| B | | GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
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