TROUBLE SHOOTING STEPS
MI91.1089
28JUN01
CAUTION!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH COMPUTERIZED LEVELING
JACK STORAGE
HYDRAULIC OPERATION
"NOT IN PARK"
Indicator light
Button
"TRAVEL"
"OFF"
Button
"DUMP"
Button
"STORE"
Indicator light
Button
"HYDRAULIC"
Indicator light
Indicator light
Manual button
RAISE LEFT SIDE
DUMP
STORE
OFF
TRAVEL
LEVEL
HYD
PARK/
NOT IN
SLOPE
EXCESS
Indicator light
"EXCESS SLOPE"
Manual button
LOWER REAR
Manual button
RAISE REAR
(4) yellow
Indicator light
LEVEL SENSING
Manual button
LOWER RIGHT SIDE
Manual button
RAISE RIGHT SIDE
Indicator light
JACK DOWN
Manual button
RAISE FRONT
Manual button
LOWER LEFT SIDE
Manual button
(4) red
LOWER FRONT
LOW BATTERY
Indicator light
BRAKE
1. Make sure the transmission is in the recommended position
for parking and the park brake is set. With the ignition switch
off, there should not be any power to the leveling system. If
any touch panel lights are on, see Part 1 of the Repair Steps.
2. Turn the ignition switch to "ON" or "ACC". Only the green
travel light should be lit at this time. If this is not so, see Part
2 of the Repair Steps.
3. Push the "I" button one time. The red indicator light above
the "I" button should glow steady. One or two yellow level in-
dicator lights may be on. The green travel light will still be on.
The "NOT IN PARK/BRAKE" light should not be lit. The pump
should not run. If this is not so, see Part 3 of the Repair Steps.
4. Push the "I" button a second time. The red light above the
"I" button should start to flash. The pump should come on and
the jacks should go vertical. The left front first, the right front
second, the right rear third and finally the left rear. The four
red warning lights should be lit. The master warning light on
the dash should be lit. The red light above the "I" button will
glow steady. If any of this sequence does not happen, see Part
4 of the Repair Steps.
NOTE: The vertical operation is a progressive function. As
each jack is swinging vertical the microprocessor is looking for
a warning switch, a three second background timer, or a jack
pressure switch. A jack can extend and start to lift the vehicle
if that warning switch is not working properly. Jack warning
switches and pressure switches must work properly for the sys-
tem to function in the automatic mode.
5. With the jacks in the vertical position, the operator can man-
ually operate the jacks with the eight buttons on the right half
of the touch panel. The up arrows will lift the vehicle by extend-
ing the jacks; whereas, the down arrows will lower the vehicle
by retracting the jacks. The jacks operate in pairs; left side,
right side, front, and rear. Press the up arrow button for each
jack pair, checking that the proper pair of jacks operate. Press
the down arrows to make sure the jacks will retract properly.
If any part of this function does not work properly, see Part 5
of the Repair Steps.
NOTE:If the vehicle is equipped with Straight-Acting jacks,
proceed to STEP 5.
Vehicles with Straight-Acting jacks: If the Low Battery
Indicator light comes ON, see Part 4b of the REPAIR
STEPS. If the pump will not run see Part 4c of the REPAIR
STEPS. If the pump runs under no load and nothing happens,
see Part 4d of the REPAIR STEPS. If a warning light for a
jack will not come ON when a jack has extended 1 to 2
inches, see Part 4e of the REPAIR STEPS. If a jack will not
stay extended, see Part 4i of the REPAIR STEPS.
Straight-Acting jacks do not have actuators.