|DTC No.||Detection Item||DTC Detection Condition||Trouble Area||Note|
|C1427||Motor Malfunction||Actuator pump motor does not operate properly.||
Refer to DTCs C142B, C146C and C146D.
CAUTION / NOTICE / HINT
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.
Inspect the fuses for circuits related to this system before performing the following procedure.
PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Select the Active Test using the GTS.
|Tester Display||Measurement Item||Control Range||Diagnostic Note|
|Motor Relay||Motor relay||Relay ON/OFF||
Operating sound of motor can be heard.
Vehicle condition: Vehicle stopped
Check the operating sound of the motor relay when operating it with the GTS.
GO TO STEP 3 Click here
CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)
Turn the engine switch off.
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the A41 skid control ECU (brake actuator assembly) connector.
Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))
Measure the resistance according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)
This code is detected when a problem is identified in the brake actuator assembly.
The motor relay is in the brake actuator assembly.
Therefore, motor relay unit inspection cannot be performed. Be sure to check if the DTC is output before replacing the brake actuator assembly.
Reconnect the A41 skid control ECU (brake actuator assembly) connector.
Clear the DTCs.
Turn the engine switch off.
Start the engine.
Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
Check if the same DTC is recorded.
If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly) with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
If any DTCs are output while jiggling a connector or wire harness of the skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
The DTCs were probably output due to a bad connection of the connector terminal.
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.
USE SIMULATION METHOD TO CHECK Click here
REPLACE BRAKE ACTUATOR ASSEMBLY Click here