TM 10-3930-643-10 3-5. TROUBLESHOOTING PROCEDURES.-Continued M A L F U N C T I ON TEST    OR    INSPECTION CORRECTIVE ACTION 5.    ENGINE    OVERHEATS    (COOLANT    TEMPERATURE    GAGE    IS    NOT    IN    NORMAL    OPERATING RANGE).-Continued Step     4. Check    to    see    if    radiator    grille    is    obstructed    or    damaged. If    obstructed,    clean.    Report    any    damage    to    organizational    maintenance. 6.    LOW    OR    NO    OIL    PRESSURE. Check   to   see   if   engine   oil   is   low,   and   if low    engine    oil    or    leaks    to    organizational any    leaks    are    visible. R e p o rt maintenance. If    low,    fill    with    approved    engine    oil.    Refer    to    LO Notify     organizational     maintenance. 7. EXCESSIVE    ENGINE    EXHAUST    SMOKE. Notify    organizational    maintenance    if    there    is    excessive smoke. 8.    TRANSMISSION    DOES    NOT    DRIVE    IN    ANY    RANGE. Check    transmission    fluid    level. If    low,    refill. Refer    to    LO    10-3930-643-12. Notify     organizational     maintenance. 10-3930-643-12. engine e x h a u st 3-8