DTC C1251/51 Open in Pump Motor Circuit
DESCRIPTION
The motor relay (semiconductor relay) is housed in the brake actuator assembly and drives the pump motor based on a signal from the skid control ECU.

WIRING DIAGRAM
Refer to DTCs C0273/13 and C0274/14 (See page BC-31).
INSPECTION PROCEDURE
HINT: After step 1 is complete, start the inspection from step 2 when using the intelligent tester, and from step 3 when not using the intelligent tester.
1 INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance


2 PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS MOTOR RELAY)
(a) Reconnect the skid control ECU connector.
(b) Connect the intelligent tester to the DLC3.
(c) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.
(d) Start the engine.
(e) Select the ACTIVE TEST mode on the intelligent tester.
ABS: 
(f) Check operating sound of the ABS motor when operating it with the intelligent tester.
OK: The operating sound of the ABS motor is heard.

3 RECONFIRM DTC
(a) Clear the DTCs (See page BC-10).
(b) Start the engine.
(c) Drive the vehicle at the speed of 6 km/h (4 mph) or more.
(d) Check that the same DTC is recorded (See page BC- 10).
HINT:
Result 
HINT:


REPLACE BRAKE ACTUATOR ASSEMBLY
Open in Stop Light Switch Circuit
ABS Warning Light Remains ONProblem symptoms table
If there are no DTCs output but the problem still occurs,
check the circuits for each problem symptom in the order
given in the table below and proceed to the relevant
troubleshooting page.
NOTICE:
When replacing the brake actuator assembly, sensor,
etc., turn the ignition switch off.
HINT:
...
Reassembly
1. INSTALL REAR DIFFERENTIAL PINION SHAFT
(a) Install the 2 thrust washers to the 2 side gears.
(b) Install the 2 side gears, 2 differential pinion gears, 2
differential pinion thrust washers and differential
pinion shaft to the differential case.
HINT:
Align the holes of the differentia ...
For vehicles equipped with traction control (trac) system
When using a 2-wheel drum tester such as a
speedometer tester or chassis dynamometer, etc., or
jacking up the front wheels and driving the wheels,
always push in the TRAC cut ("TRAC OFF") switch and
turn the TRAC system OFF.
FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRAC) SYS ...