Lexus NX: Brake System (C1A50)
DESCRIPTION
When an electronically controlled brake system malfunction signal sent from the brake booster with master cylinder assembly (skid control ECU) is detected by the clearance warning ECU assembly, DTC C1A50 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1A50 | Brake System | When the power switch is on (IG), a VSC warning light malfunction signal is detected for 1 second or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
-
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
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-
When disconnecting and reconnecting the auxiliary battery
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HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
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-
After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).
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PROCEDURE
| 1. | CHECK FOR DTC |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
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HINT:
After turning the power switch from off to on (IG), wait 4 seconds or more before checking for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes(b) Clear the DTCs according to the screen on the Techstream.
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(c) Recheck for DTCs.
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HINT:
- DTC C1A50 is stored when a malfunction signal sent from the electronically controlled brake system is detected.
- If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C1A50 will not be output again.
-
If DTC C1A50 is output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even though the DTC was not output when rechecking for DTCs.
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| Result | Proceed to |
|---|---|
| DTC C1A50 is output | A |
| DTC C1A50 is not output | B |
| A | .gif) | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
| B | | USE SIMULATION METHOD TO CHECK |
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Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART ASC System DTC No. Detection Item Link B1360 Speaker Circuit B1361 Volume Switch Circuit B1362 ECU Malfunction U0129 Lost Communication with Brake System Control Module U0142 Lost Communication with Body Control M
