MANUAL TOUCH PANEL OPERATION

The ignition must be in the “ON” position and the park brake must be set for the system to operate. The manual RAISE (Up Arrow) and LOWER (Down Arrow) buttons will NOT function if the AUTO LEVEL or AUTO STORE lights are flashing. Push the CANCEL button to turn of an AUTO operation light.

Make sure all jacks are fully retracted. Use the valve release cams to retract any extended jack. Make sure all valve release cams are closed.

Make sure the park brake is set and turn the ignition to “ACC”. One or two yellow LEVEL SENSING indicator lights may be on. The green TRAVEL MODE indicator light should be on.

MANUAL TOUCH PANEL OPERATION

THE TRAVEL MODE LIGHT IS NOT ON. NO OTHER TOUCH PANEL LIGHTS ARE ON.

Push the AUTO STORE button. Does the Store light start to Flash?

If the Store light starts to flash, replace the touch panel.

MANUAL TOUCH PANEL OPERATION

ALL JACKS ARE FULLY RETRACTED, A RED JACK DOWN LIGHT IS ON

Unplug the jack warning switch for any red indicator light that does not go out. Does that light go out?

MANUAL TOUCH PANEL OPERATION

THE RED JACK DOWN LIGHT GOES OUT WHEN UNPLUGGED

Remove the warning switch from the jack. Plug the switch back into the harness. Hold a magnet against the warning switch.

THE RED JACK DOWN LIGHT GOES OUT – Replace the jack

THE RED JACK DOWN LIGHT DOES NOT GO OUT – Replace the warning switch

MANUAL TOUCH PANEL OPERATION

THE RED JACK DOWN LIGHT DOES NOT GO OUT WHEN UNPLUGGED

MANUAL TOUCH PANEL OPERATION

MORE THAN TWO YELLOW LEVEL INDICATOR LIGHTS OR OPPOSING YELLOW INDICATOR LIGTS ARE ON – I.E. LEFT SIDE AND RIGHT SIDE LIGHTS ARE ON

NOTE: There is most likely an extension cable between the sensing unit plug at the MIOM and the sensing unit

Unplug the sensing unit cable at the MIOM. Do all the yellow Level indicator lights go out?

MANUAL TOUCH PANEL OPERATION

ONE OR MORE YELLOW LEVEL INDICATOR LIGHTS STAY ON

The issue is most likely the MIOM. Replace the MIOM.

MANUAL TOUCH PANEL OPERATION

ALL OF THE YELLOW LEVEL INDICATOR LIGHTS GO OUT WITH THE SENSING UNIT CABLE UNPLUGGED FROM THE MIOM

Plug the sensing unit cable back in at the MIOM. Unplug the sensing unit from the sensing unit cable. Do any yellow Level indicator lights come on?

YES – The issue is with the sensing unit cable. The cable may be pinched and shorted to ground or the ground wire in the cable may be shorted to another wire in the cable. Fix or replace the cable.

NO – Replace the sensing unit.

MANUAL TOUCH PANEL OPERATION

WITH THE IGNITION ON AND THE PARK BRAKE SET, THE TRAVEL MODE LIGHT IS ON. NO RED JACK DOWN INDICATOR LIGHTS ARE ON. NO MORE THAN TWO YELLOW LEVEL INDICATOR LIGHTS ARE ON.

It is assumed the jacks are plumbed properly, the jacks extend and retract properly and the red JACK DOWN warning lights are working properly. If there is an issue with the warning lights, go to the beginning of JACK DIAGNOSTICS – STEP 4

Check jack operation in the following order:

• Front
  Rear
  Left Side
  Right Side

Repeat the following tests until all four sets of up arrow and down arrow buttons have been checked.

Push the up arrow button. The pump should run. The front jacks should start to extend.

THE CORRECT JACKS EXTENT WHEN THE UP ARROW BUTTON IS PUSHED

Push the down arrow button corresponding to the up arrow button that was pushed. The jacks should retract. Do the jacks retract?

THE JACKS EXTEND BUT WILL NOT RETRACT WHEN PUSHING THE DOWN ARROW BUTTON

The issue is most likely the touch panel. Replace the touch panel.

THE “NOT IN PARK/BRAKE” LIGHT COMES ON WHILE PUSHING AN UP ARROW

Make sure the park brake is set.

If the park brake is set, check that the #9000 wire is properly connected to the vehicle park brake. Consult the vehicle manufacturer for park brake wiring information.

The #9000 wire should have a ground when the park brake is set. With the park brake set, unplug the 35 pin connector at the I/O module and check pin 1 in the harness plug.

If a ground is not present, the #9000 wire, the connection for the #9000 wire to the park brake circuit or the park brake switch is the issue. Repair as necessary.

If a ground is present, make sure the 9000 wire is securely seated into the 35 pin harness connector. Replace the MIOM if the wire is OK.

THE PUMP DOES NOT RUN WHEN PUSHING AN UP ARROW. THE “NOT IN PARK/BRAKE” LIGHT DOES NOT COME ON WHILE PUSHING THE BUTTON.

It is assumed at this point the Master and Pump relays are good. It is also assumed there is good voltage to the relays and the pump does run with proper pressure. Push the pump run switch and make sure the pump runs. If it does not run, return to “JACK DIAGNOSTICS – STEP TWO”.

Try pushing a different up arrow button. If the pump runs when pushing any up arrow button, replace the touch panel.

If the pump does not run when pushing any up arrow button, check the Master relay LED. With the ignition on, with or without the park brake set, this LED should be lit.

THE PUMP DOES NOT RUN WHEN PUSHING AN UP ARROW. THE MASTER RELAY LED ON THE MIOM IS NOT LIT

Remove the 8500 wire from terminal #2 of the master rely and unplug the large Amp Seal connector from the MIOM. Wait a few seconds. Make sure the 8500 wire ring terminal is not in contact with a ground. Plug the Amp Seal connector back in.

If the master relay LED does not come on, replace the MIOM.

If the master relay LED does come on, replace the master relay.

THE PUMP DOES NOT RUN WHEN PUSHING AN UP ARROW. THE MASTER RELAY LED ON THE MIOM IS LIT

Look for the pump relay LED while pushing an up arrow button

THE PUMP DOES NOT RUN WHEN PUSHING AN UP ARROW. THE PUMP RELAY LED ON THE MIOM IS LIT

Check for a minimum of 10 volts on terminal #6 of the pump relay.

If there is less than 10 the issue is the 8600 wire or it’s connection to terminal #6. If the wire and connection is good, replace the MIOM.

If there is 10 or more volts on terminal #6, return to “JACK DIAGNOSTICS – STEP 2”.

THE PUMP DOES NOT RUN WHEN PUSHING AN UP ARROW. THE PUMP RELAY LED ON THE MIOM IS NOT LIT

Check the 40 amp fuse and the black #10 wire from the MIOM to the #3 terminal of the Master relay. If the replace the fuse if blown. Make sure the #10 wire and it’s connection to terminal #3 are good.

THE PUMP RUNS. THE CORRECT JACKS DO NOT EXTEND WHEN AN UP ARROW BUTTON IS PUSHED

It is assumed the jack plumbing was checked in STEP THREE of JACK DIAGNOSTICS.

The jack wires are numbered and also there is a tag close to the Packard connector.

The tags are labeled:

• LR – Left Rear
  LF – Left Front
  RF – Right Front
  LF – Left Front

Make sure the MIOM wires are connected to the correct valve.

THE PUMP RUNS. ONE OR MORE JACKS DO NOT EXTEND WHEN AN UP ARROW BUTTON IS PUSHED

Check the red jack LEDS on the MIOM while pushing an Up Arrow button.

THE PUMP RUNS. ONE OR MORE JACKS DO NOT EXTEND WHEN AN UP ARROW BUTTON IS PUSHED. JACK LEDS ON THE MIOM ARE NOT COMING ON

If a jack LED is not coming on, unplug the valve and the main MIOM connector. Wait a few seconds and plug only the main MIOM connector back in. Now push the Up Arrow and watch the jack LEDs.

If the LED still does not come on, replace the MIOM.

If the LED comes on, replace the valve.

THE PUMP RUNS. ONE OR MORE JACKS DO NOT EXTEND WHEN AN UP ARROW BUTTON IS PUSHED. JACK LEDS ON THE MIOM ARE NOT COMING ON

If the jack LEDs are coming on, check for a minimum of 10 volts between the white and black wire for the valve, valve plugged in, while pushing the Up Arrow button.

Note: A test lead is available to do a voltage test with the valves plugged in. TS39641

If a minimum of 10 volts is not present, replace the MIOM

If a minimum of 10 volts is present, replace the valve

IT IS ASSUMED THE SYSTEM IS WORKING WITH THE MANUAL UP AND DOWN ARROWS.

LEVEL SENSING UNIT TEST

With the ignition on and the park brake set, one or two yellow level indicator lights may be on

ONE OR TWO YELLOW LEVEL INDICATOR LIGHTS ARE ON

A lit yellow level indicator light means that side or end is low. Extend jacks to turn the lights off. With all lights off, the vehicle should be level within the tolerances of the level sensing unit, about an inch side to side and about 4 – 5 inches front to rear.

If two yellow level indicator lights are on, always run the side jacks first.

Push the appropriate Up Arrow button to extend a jack pair to turn out the lit yellow level indicator light. If two lights are lit, after the side light goes out repeat the process with the lit end light.

If the lights go out, check to see if the coach is level. If the vehicle is not level, adjust the level sensing unit according to page MP44.1511 of the 725 repair manual.

ONE OR MORE YELLOW LEVEL INDICATOR LIGHTS WILL NOT GO OUT

NOTE: There is most likely an extension cable between the sensing unit plug at the MIOM and the sensing unit

Unplug the sensing unit cable at the MIOM. Do all the yellow Level indicator lights go out?

ONE OR MORE YELLOW LEVEL INDICATOR LIGHTS STAY ON

The issue is most likely the MIOM. Replace the MIOM.

ALL OF THE YELLOW LEVEL INDICATOR LIGHTS GO OUT WITH THE SENSING UNIT CABLE UNPLUGGED FROM THE MIOM

Plug the sensing unit cable back in at the MIOM. Unplug the sensing unit from the sensing unit cable. Do any yellow Level indicator lights come on?

YES – The issue is with the sensing unit cable. The cable may be pinched and shorted to ground or the ground wire in the cable may be shorted to another wire in the cable. Fix or replace the cable.

NO – Replace the sensing unit.

NO YELLOW LEVEL INDICATOR LIGHTS ARE ON

A lit yellow level indicator light means that side or end is low. Extend jack pairs, one at a time, to lift the vehicle and turn the opposite level indicator light on.

Example. Push the left side Up Arrow button and raise the left side of the vehicle. The right side yellow level indicator light should come on.

Push the corresponding down arrow to retract those jacks. The lit level indicator light should go out. Repeat this with all four sets of Up Arrow and Down Arrow buttons.