20 - 4
Steer Mode Valve
- Checking Solenoid Operation
The solenoids operate according to the steer mode that is
selected.
Mode:
Solenoid(s) Energised:
2 Wheel Steer
W
4 Wheel Steer
X
,
Z
Crab Steer
X
,
Y
Operation (energisation) of a solenoid can be easily detected
by placing a steel object (e.g. screwdriver blade) close to the
outer casing. A magnetic attraction of the steel object
towards the solenoid indicates energisation.
If a solenoid is not energising carryout the following checks:
1
Check the fuse is intact. If not, renew and then check
that all steer mode solenoid combinations function
correctly.
2
If the fuse is intact remove the electrical connector from
the malfunctioning solenoid(s) and check that the 12V
supply is present across the connector pins. If not,
check the supply circuit.
3
Check the solenoid coil resistance which should
measure a few ohms (if unsure of the value compare
with a known good solenoid).
Renew the solenoid if the reading indicates a short
circuit (zero ohms) or open circuit (infinate resistance). If
a reading somewhere between the two is obtained,
reverse the two instrument probes and repeat for a
valid check.
Section H
9803/3280
Section H
20 - 4
Issue 1
Service Procedures
A396570
W
X
Z
Y
