Mitsubishi 1989-1993 GALANT Service Manual page 1173

SERVICE BRAKES
When diagnostic trouble code "52 MOTOR RLY" is displayed
[Explanation]
The ABS ECU outputs this diagnostic trouble code for
the motor relay and motor in the following cases.
When the motor relay does not function
l
When there is trouble with the
l
does not revolve
When there is trouble with the motor itself and it
l
the motor does not revolve
When the motor continues to revolve
l
MAIN FUSIBLE
LINK @
[Hint]
If there is motor operation noise when wheel speed
exceeds Gkm/h (4mph) when starting up
engine is started, or when there is forced scan tool
motor
drive, there is a broken or short circuited motor
itself and it
monitor wire.
noise when wheel speed
(Remove the motor relay>
\
Remove the motor relay and -
check resistance values.
No. 85-No. 86:
value 30-60 Q
ty
Battery voltage is applied on
terminals No.86 and No.85
grounded
l -
Is pump motor ground con-
Install motor relay and
move HU connector.
Does voltage between body
connector terminal 11 and
ground indicate battery vol-
tage?
tor and remove the ECU
Is resistance between body - No - Malfunction of harness
connector terminal No. 2 and
ABS ECU malfunction
TSB Revision
System Troubleshooting
Yes
Broken wire or short cir-
resistance
Replace motor relay.
No
Connect ground wire.
motor power circuit
Repair the harness.
Yes
No
between HU and ECU
Repair harness.
Replace ABS ECU.
after the
I
I