DIPLOMAT 2004
10 • 406
CHASSIS INFORMATION
Diagnostic Codes:
The diagnostic codes are numerical representations of malfunctions in the
transmission operations. Each code is a two digit main code and a two digit sub
code. The codes, when detected, are logged in the ECU memory. These codes
will fall in two classes: active and inactive. Active codes are codes currently
effecting the ECU process. Inactive codes are retained but may not effect the
ECU process. The diagnostic mode must be entered. A maximum of five codes,
D1
to
D5
, may be listed at one time. The highest priority code will be listed in
D1
. The
MODE
button will enable selection of sequential codes.
To Enable Diagnostic Code Selection Display:
• Stop the motorhome at a safe location.
• Apply the parking brake.
• Simultaneously press the
UP
and
DOWN
arrows twice to enter the
stored codes. The first time the arrows are pressed will indicate the
oil level display. Press the
UP
and
DOWN
arrows again.
• The codes will display one digit at a time.
• The mode button is pressed to scroll through the codes.
• Any code obtained should be noted and reported to an Allison
Service Center for evaluation and possible repair.
• Inactive codes can be cleared by holding the
MODE
button for
approximately three seconds. Some codes are self clearing while
others will require service or ignition on/off cycles to clear.
The Allison MH Series requires minimum maintenance. Careful attention to
fluid level and connections for the electronic and hydraulic circuits is very
important.
For easier inspection the transmission should be kept clean. Make periodic
checks for loose bolts and leaking fluid lines. Check the condition of the
electrical harnesses regularly. Check the engine cooling system occasionally for
evidence of transmission fluid which would indicate a faulty oil cooler. Report
any abnormal condition to an Allison dealer.
Prevent Major Problems:
Help the WTEC III control system oversee the operation of the transmission.
Minor problems can be kept from becoming major problems if an Allison
Transmission distributor or dealer is notified when one of these conditions occur:
1. The shifting feels odd.
2. The transmission leaks fluid.
3. There are unusual transmission-related sounds (changes in sound
caused by normal engine thermostatic fan cycling, while climbing a
long grade with a heavy load, have been mistaken for
transmission-related sounds).
4. The
CHECK TRANS
light comes on frequently.
Periodic
Inspections
Summary of Contents for DIPLOMAT 2004
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Page 88: ...DIPLOMAT 2004 2 88 DRIVING SAFETY Weight Label...
Page 92: ...DIPLOMAT 2004 2 92 DRIVING SAFETY...
Page 95: ...2 95 DRIVING SAFETY DIPLOMAT 2004 020254...
Page 97: ...2 97 DRIVING SAFETY DIPLOMAT 2004 020255b...
Page 98: ...DIPLOMAT 2004 2 98 DRIVING SAFETY...
Page 99: ...2 99 DRIVING SAFETY DIPLOMAT 2004 VIEWS Front Rear 010770 010771...
Page 100: ...DIPLOMAT 2004 2 100 DRIVING SAFETY Roadside Curbside 010769 010768...
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Page 325: ...8 325 ELECTRICAL SYSTEMS HOUSE DIPLOMAT 2004 060191B Electrical Layout...
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Page 432: ...DIPLOMAT 2004 10 432 CHASSIS INFORMATION...
Page 434: ...DIPLOMAT 2004 10 434 CHASSIS INFORMATION Lubrication Service Record...
Page 435: ...10 435 CHASSIS INFORMATION DIPLOMAT 2004 Battery and Tire Record...
Page 437: ...INDEX Diplomat...
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