Hyundai HL955 Manual page 138

2. TROUBLESHOOTING 2. TROUBLESHOOTING
1) 1) TRANSMISSION TRANSMISSION
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Diagnose malfunction charts are arranged from most probable and simplest to verify, to least likely, Diagnose malfunction charts are arranged from most probable and simplest to verify, to least likely,
more difficult to verify. Remember the following steps when troubleshooting a problem : more difficult to verify. Remember the following steps when troubleshooting a problem :
Step 1. Operational check out procedure (See group 3 in section 1.)
Step 2. Operational checks (In this group.)
Step 3. Troubleshooting
Step 4. Tests and/or adjustments (See group 3.)
Problem
Transmission slippage
Error code on display
Cause
Low oil level.
Wrong oil grade.
Restricted transmission pump
suction screen.
Leak in transmission control valve
or gasket.
Low transmission pump flow due
to worn pump.
Weak or broken pressure regulat-
ing valve spring.
Something wrong in transmission. Go to transmission fault code group at page
3-82
Remedy
Add oil.
Change oil.
Remove and clean screen.
Remove valve and inspect gaskets.
Do transmission pump flow test.
Do transmission system pressure test.
3-57~3-73.