Lexus NX: ABS Warning Light does not Come ON
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication.
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.
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PROCEDURE
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output.
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| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| B | .gif) | INSPECT CAN COMMUNICATION SYSTEM |
|
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| 2. | PERFORM ACTIVE TEST USING TECHSTREAM (ABS WARNING LIGHT) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the Active Test on the Techstream.
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| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| ABS Warning Light | ABS warning light | Warning light ON/OFF | Observe combination meter assembly |
(d) Select the Data List on the Techstream.
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| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| ABS Warning Light | ABS warning light | ON or OFF | ON: Warning light on OFF: Warning light off | - |
| Active Test Display |
|---|
| ABS Warning Light |
| Data List Display |
|---|
| ABS Warning Light |
(e) Check the operating condition of the ABS warning light when operating it using the Techstream.
| Result | Proceed to |
|---|---|
| ABS warning light in the Data List does not change using the Active Test. | A |
| ABS warning light in the Data List turns ON/OFF using the Active Test. | B |
| A | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
|
| 3. | INSPECT COMBINATION METER ASSEMBLY |
(a) Turn the power switch off.
(b) Perform the Active Test of the combination meter assembly (meter CPU) using the Techstream.
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| Tester Display |
|---|
| Indicat. Lamp ABS |
(c) Check the combination meter assembly.
OK:
The ABS warning light turns on or off in accordance with the Techstream operation.
| OK | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| NG | | INSPECT METER / GAUGE SYSTEM |
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SEE MORE:
Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. REMOVE NO. 1 MOULDING TAPE (a) Remove the No. 1 moulding tape (double-sided tape). HINT: Do not pull on the No. 1 moulding tape (double-sided
Vehicle Control History
VEHICLE CONTROL HISTORY CHECK THE VEHICLE CONTROL HISTORY (LIGHTING SYSTEM) HINT:
The vehicle control history data (lighting system) stores the history of the reject function and system protection operations.
The number of occurrences, date and distance are stored in batches for each item.
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