DESCRIPTION
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
C142771 | ABS Pump Motor Actuator Stuck | Actuator pump motor does not operate properly. |
|
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
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PROCEDURE
1. | PERFORM ACTIVE TEST USING TECHSTREAM (MOTOR RELAY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Chassis / Brake/EPB / Active Test.
Chassis > Brake/EPB > Active Test Tester Display | Measurement Item | Control Range | Restrict Condition | Diagnostic Note |
---|---|---|---|---|
Motor Relay | ABS motor relay | OFF / ON | Vehicle condition: Vehicle stopped HINT: To protect this Actuator and Solenoid, this test will only last 5 seconds. | - |
Tester Display |
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Motor Relay |
(d) Check the operating sound of the pump motor when operating it using the Techstream.
Result | Proceed to |
---|---|
Operating sound is heard. | A |
Operating sound is not heard. | B |
B | ![]() | GO TO STEP 4 |
|
2. | CLEAR DTC |
(a) Operate the Techstream to clear the codes. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
Chassis > Brake/EPB > Clear DTCs(b) Press the DTC clear button.
(c) Turn the engine switch off.
|
3. | RECONFIRM DTC |
(a) Start the engine.
(b) Perform a road test.
(c) Read the DTCs following the prompts on the Techstream. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
Chassis > Brake/EPB > Trouble Codes(d) Check if the same DTC is output.
Result | Proceed to |
---|---|
DTC C142771 is not output. | A |
DTC C142771 is output. | B |
HINT:
A | ![]() | USE SIMULATION METHOD TO CHECK |
B | ![]() | REPLACE BRAKE ACTUATOR ASSEMBLY |
4. | CHECK HARNESS AND CONNECTOR (GND2 TERMINAL) |
(a) Turn the engine switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the A41 skid control ECU (brake actuator assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A41-30 (GND2) - Body ground | 1 minute or more after disconnecting the cable from the negative (-) battery terminal | Below 1 Ω |
OK | ![]() | REPLACE BRAKE ACTUATOR ASSEMBLY |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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