Brake Fluid Pump Relay: Testing and Inspection

BRAKE CONTROL: ABS MOTOR RELAY: ON-VEHICLE INSPECTION

NOTICE:
While the battery is connected, even if the power switch is OFF, the brake control system activates when the brake pedal is depressed or the door courtesy switch turns on. Therefore during servicing of the brake system components, do not operate the brake pedal or open/close the doors while the battery is connected.

1. CHECK ABS MOTOR RELAY (ABS MTR1)

HINT
The ABS motor relay (ABS MTR1) cannot be removed and inspected, as it is an internal relay of the engine room junction block.

(a) Turn the power switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Remove the relay inspection terminal cover of the engine room No. 2 junction block.





(d) Turn the power switch ON (IG).

(e) Using the Techstream, perform the Active Test for the ABS motor relay (ABS MTR1) and measure the voltage between the relay inspection terminals of the engine room junction block.

HINT
As the ABS motor relay (ABS MTR1) is a semiconductor relay, there are no operation sounds.





Standard voltage:





(e) If the result is not as specified, check the harness and connector and replace them as necessary.

If the harness and connector are in good condition, replace the engine room No. 2 junction block assembly.

2. CHECK ABS MOTOR RELAY (ABS MTR2)

(a) Remove the ABS motor relay from the No. 3 relay block.

(b) Measure the resistance according to the value(s) in the table below.





Standard resistance:





(b) If the result is not as specified, replace the relay.

(c) Install the ABS motor relay.