DTC C1253: Pump Motor Relay [08/2015 - ]: Procedure

1. Turn the ignition switch off.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Start the engine.
6. Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.
   ABS/VSC/TRAC
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Motor Relay	Motor relay	Relay ON/OFF	An operating sound of the motor can be heard.

7. Check the operating sound of the motor individually when operating it with the Techstream.

   OK

   An operating sound of the motor can be heard.

Result: 

NG 

See step  3

Result: 

OK 

See step  2

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).
2. Turn the ignition switch off.
3. Depress the brake pedal more than 40 times.
4. Turn the ignition switch to ON.
5. Wait until the pump motor stops.
6. Depress the brake pedal several times until the pump motor turns on. (Procedure A)
7. Wait until the pump stops. (Procedure B)
8. Repeat the above steps (procedure A and B) 3 more times.
9. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).

   HINT: 

   Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

   RESULT
   
   

   Result	Proceed to
   DTC is output	A
   DTC is not output	B

Result: 

A 

REPLACE MASTER CYLINDER SOLENOID 

(Refer to DISASSEMBLY [08/2015 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )

1. Disconnect the A6 and A7 skid control ECU connectors.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A6-2 (+BM1) - Body ground	Always	11 to 14 V
   A7-2 (+BM2) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Skid Control ECU)

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

See step  2[08/2015 - 08/2019], or refer to PROCEDURE - Step 2 [08/2019 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).
2. Turn the ignition switch off.
3. Depress the brake pedal more than 40 times.
4. Turn the ignition switch to ON.
5. Wait until the pump motor stops.
6. Depress the brake pedal several times until the pump motor turns on. (Procedure A)
7. Wait until the pump stops. (Procedure B)
8. Repeat the above steps (procedure A and B) 3 more times.
9. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).

   HINT: 

   Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

   RESULT
   
   

   Result	Proceed to
   DTC is output	A
   DTC is not output	B

Result: 

A 

REPLACE MASTER CYLINDER SOLENOID 

(Refer to DISASSEMBLY [08/2015 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )