Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 242

ABS-ECU
The ABS-ECU has a fail-safe function which controls the EBD in the following way if an abnormality
occurs in the ABS system.
Fail-Safe Function
Problem location
Front wheel speed sensor 1 ab-
normality
ABS solenoid valve (front) abnormal-
ity
ABS solenoid valve (front) abnormal-
ity
Stop lamp switch abnormality
Front wheel speed sensor 2 ab-
normality
Motor abnormality (OFF problem)
Motor abnormality (ON problem)
Rear wheel speed sensor 2 abnormal-
ity
ABS solenoid valve (rear) abnormality
ABS-ECU abnormality
ABS-ECU power supply voltage
abnormality
ABS-ECU connector disconnected
TROUBLESHOOTING
Items other than those given below are the same as before.
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptoms
When the ignition key is turned to "ON" (engine stopped), the
brake warning lamp does not illuminate.
Even after the engine is started, the brake warning lamp does
not switch off.
(However, the parking brake is released and the brake fluid
level, brake fluid sensor and parking brake switch are all
normal.)
ABS <2WD> -
General/Troubleshooting
Brake warning
lamp
OFF
OFF
ON
ABS warning EBD control
lamp
ON Normal control is carried out.
ON Hydraulic pressure increases to the
rear wheels are limited.
(Control gives priority to preventing
the rear wheels from locking.)
ON Control is prohibited.
Inspection procedure No.
1
2
35B-5
Reference page
35B- 6
35B- 7