DTC C1427: Motor Malfunction [12/2013 - 11/2016]: Procedure
- PERFORM ACTIVE TEST USING TECHSTREAM (ABS MOTOR RELAY)
- Connect the Techstream to the DLC3.
- Start the engine.
- Select the Active Test using the Techstream.
Refer to DATA LIST / ACTIVE TEST [12/2013 - 11/2016]
Chassis > ABS/VSC/TRAC > Active Test
Tester Display Measurement Item Control Range Diagnostic Note Motor Relay ABS motor relay Relay ON/OFF Operating sound of motor can be heard Chassis > ABS/VSC/TRAC > Active Test
Tester Display Motor Relay - 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
Result:
B
See step 3
Result:
A
Go to next step
- RECONFIRM DTC
HINT:
This DTC is detected when a problem is identified in the skid control ECU (brake actuator assembly).
The ABS motor relay is in the skid control ECU (brake actuator assembly).
Therefore, ABS motor relay unit inspection cannot be performed. Be sure to check if the DTC is output before replacing the skid control ECU (brake actuator assembly).
- Turn the ignition switch off.
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]
Chassis > ABS/VSC/TRAC > Clear DTCs
- Turn the ignition switch off.
- Start the engine.
- Perform a road test.
- Check if the same DTC is output.
Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]
Chassis > ABS/VSC/TRAC > Trouble Codes
HINT:
- If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly) with the ignition switch ON and the stop light switch assembly off, the ECU performs self diagnosis of the pump motor circuit.
- If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly).
- 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.
- If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a 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.
Result Proceed to DTC C1427 is not output. A DTC C1427 is output. B Result:
A
USE SIMULATION METHOD TO CHECK.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016]
Result:
B
REPLACE BRAKE ACTUATOR ASSEMBLY.
Refer to REMOVAL [12/2013 - 11/2016] .
- CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)
- Turn the ignition switch off.
*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly)) - Make sure that there is no looseness at the locking part and the connecting part of the connectors.
- Disconnect the A47 skid control ECU (brake actuator assembly) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A47-13 (GND2) - Body ground Always Below 1 Ω
Result:
OK
REPLACE BRAKE ACTUATOR ASSEMBLY.
Refer to REMOVAL [12/2013 - 11/2016] .
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)
- Turn the ignition switch off.