MI91.1280
24MAR09
625 TROUBLE SHOOTING STEPS
SERIES/PARALLEL OPERATION OF SOLENOID VALVES
DIAGNOSTICS FOR THE AUTOMATIC STORE SEQUENCE
During manual leveling, manual retract and automatic leveling, the solenoid valves are operated independently of each other.
That is, each valve has its own ground and sw12 volts. The ground wires for the right front (7600) and right rear (7601)
solenoid valves are routed to the control box and through CRX1 (7600) and CRX2 (7601) to ground. The ground wires for the
left front and left rear are white wires that are attached to the ground stud on the side of the pump. When the "STORE" button
is pushed, the solenoid valves for the two front jacks are turned on first. The solenoid valves for the rear jacks are turned on
five (5) seconds later.
Two (2) seconds after the front valves are turned on, the left front relay (LED 7) is turned off along with the CRX1 relay
(LED 20). Current is routed through the right front valve coil, back to the control box on wire 7600, out to the left front
valve, then through the left front valve coil to find a ground at the ground stud. The two front valves are now wired in
series. Five (5) seconds after the front valves are turned on, the two rear valves are turned on. Two (2) seconds after
the two rear valves are turned on, the left rear relay (LED 3) is turned off along with the CRX2 relay (LED 19). Current
is routed through the right rear valve coil, back to the control box, out to the left rear valve on wire 7601, then through
the left rear valve coil to find a ground at the ground stud. The two rear valves are now wired in series. Approximately
seven (7) seconds after the "STORE’ button is pushed, the two front valves are operating in series and the two rear
valves are operating in series. When checking voltage at the solenoid valves in the automatic STORE mode, seven (7)
seconds after the "STORE" button is pushed, the voltage to each valve should be in the 5 to 6 volt range.
The proper sequence of the LEDs for the four valve relays along with CRX1 and CRX2 is as follows:
1. Push "STORE", LEDs 5, 6, 7, 8, 19 and 20 will come on.
2. Two (2) seconds later, LEDs 7 and 20 will turn off.
3. Three (3) seconds later, LEDs 1, 2, 3 and 4 will turn on.
4. Two (2) seconds later, LEDs 3 and 19 will turn off.
PART 1. ONE OR MORE JACKS WILL NOT RETRACT AFTER THE "STORE" BUTTON IS PUSHED.
1. If at least one jack retracts properly but others will not review PART 15 of the manual operation section.
2. If no jacks will retract, review PART 16 of the manual operation section.
PART 2. THE LEFT FRONT OR THE LEFT REAR START TO RETRACT BUT STOP AFTER SEVERAL
SECONDS. THEY RETRACT PROPERLY IN THE MANUAL MODE.
2. If the left rear jack starts to retract but stops, replace the right rear solenoid valve.
1. If the left front jack starts to retract but stops, replace the right front solenoid valve.
WHEN THE JACKS ARE FULLY RETRACTED.
PART 3. ONE OR MORE RED WARNING LIGHTS ON THE TOUCH PANEL WILL NOT TURN OFF
1. Review PART 15 of the manual operation section.
SEE: MP85.184J
then the system will turn off. The "TRAVEL MODE" light will not be on.
will stay in the STORE mode for thirty (30) minutes from the time the "STORE" button was pushed
NOTE: If one or more jacks will not retract and/or a red jack down warning light will not go out, the system
7. Six minutes after the last red warning light goes out, the touch panel will turn off.
6. The red warning lights on the touch panel will go out as each jack retracts within 1/4 to 1/2 inch.
5. Five (5) seconds later the rear jacks will start to retract.
and buzzer will be on while the jacks are retracting.
1. The ignition must be in the ON or ACC. position. If the ignition is in the ON position, the master warning light
AUTOMATIC STORE (RETRACT) SEQUENCE
4. The two front jacks will start to retract.
2. Push the "STORE" button.
50 LB PRESS SW INPUT
33-GREEN
LEFT SIDE
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
MP85.184J
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
OR CONNECTION CABLE
4-PIN CONNECTOR.
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
IF A YELLOW LED IS LIT AND THE
GROUND
39
SYSTEMS.
38
36
37
34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
MP85.184J
F10 - 10 AMP
13AUG07
MASTER WARNING
ACCESSORY OUT FOR
JACK INTERRUPT
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
31
LEFT
TRAVEL
PUMP
RELAY
RELAY
MASTER
DUMP
SENSING UNIT
+12V
REAR
RIGHT SIDE
PIN 1
FRONT
23
25
24
28
26
27
21
22
30
29
REAR
REAR
RIGHT
FUSE
LED
1
2
3
F1
4
12
11
F2
LEFT
RIGHT
FRONT
CRX2
FRONT
F7
F6
14
13
19
7
5
15
16
6
F8
17
F3
18
8
14-RED
F10
32
35
34
33
24-YELLOW
31-GREEN
30-YELLOW
29-RED
28-RED
27-RED
26-RED
25-RED
32-RED
PF4
15-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
23-YELLOW
PF3
CRX1
F4
F9
20
2-RED
3-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
13-YELLOW
1-YELLOW
LED
F9 - 5 AMP
F8 - 5 AMP
F7 - 5 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
F1 - 15 AMP
FUSE
MASTER RELAY OUTPUT
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT REAR PRESS SW
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
LEFT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
RELAY DESCRIPTION
RIGHT REAR OUTPUT
MASTER RELAY COIL
LEFT FRONT OUTPUT
LEFT FRONT COIL
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
RIGHT REAR COIL
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
NOTE: The "STORE" button should function with the
park brake released.
3. If the vehicle is equipped with an air suspension, the suspension should return to ride height at this time.
