Toyota Hilux Surf 1993 Owner's Manual page 609

SUSPENSION AND AXLE –
INSPECTION OF COMPONENTS
1. INSPECT A.D.
D. SOLENOIDS
(a) Measure the resistance of the solenoids.
Resistance: 37 – 44
(b) Apply the battery voltage to the solenoid.
Check that air flows from port E to port F.
Check that air does not flow from port E to the air fil–
ter.
(c) Disconnect the battery voltage from the solenoid.
Check that air flows from port E to the air filter.
Check that air does not flows from port E to port F.
2. INSPECT A.D.D. RELAY
(Continuity)
Apply battery voltage to
terminals 6 and 2.
3. INSPECT A.D.
D. INDICATOR SWITCH
(a) Check that there is continuity between terminals
when the switch is pushed (differential connected
position).
(b) Check that there is no continuity when the switch is
free (differential disconnected position).
Front Differential (A.D.D. Control System)
/
Terminal
Condition
Constant
SA–109