TM 9-2320-302-20 0006 00-4 Table 1. Engine Troubleshooting Procedures - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 6. Excessive Exhaust Smoke- Continued. b. If  CEL  comes  on  for  five seconds and then turns off, perform   step   4   and   read Inactive Flash Codes. c. If   CEL   comes   on,   but   is erratic or intermittent, refer to DDEC system fault code 10.4 (WP 0007 00). 4.  Connect Diagnostic Data Reader   (DDR)   to   Diagnostic Data Link (DDL) connector. Perform DDEC system troubleshooting.  Refer  to  section number  that  matches  flash  code logged (WP 0007 00). 7.  Low Oil Pressure. 1.  Check engine oil level. Fill  to  proper  level  (TM  9-2320- 302-10). 2.  With  ignition  ON  and  engine OFF,     press     Check     Engine Button    and    observe    Check Engine Light (CEL). a. If CEL comes on and stays on, perform step 3 and read Active Flash Codes. b. If CEL comes on for up to five seconds and then turns off, perform step 3 and read Inactive Flash Codes. c. If   CEL   comes   on   but   is erratic or intermittent, refer to DDEC system fault code, 10.4 (WP 0007 00). 3.  Connect Diagnostic Data Reader   (DDR)   to   Diagnostic Data Link (DDL) connector. Perform DDEC system troubleshooting.  Refer  to  section number  that  matches  flash  code logged (WP 0007 00). 8.  High Oil Consumption. 1.  Check for overfilled crankcase. Drain  oil  to  proper  level  (TM  9- 2320-302-10). 2.  Check  for  oil  in  air  reservoir tanks. If  oil  is  found  in  air  reservoirs, replace  air  compressor  assembly (WP 0029 00). 3.  Check for indications of oil at turbocharger outlet and inlet. If    oil    is    found,    notify    Direct Support Maintenance. 9.  Engine Overheats. 1.  Check coolant level. Fill coolant to proper level (TM 9- 2320-302-10). 2.  Check for loose or missing fan belts. Adjust   or   replace   fan   belts   as required (WP 0046 00). 3.  Check    radiator    clamps    and hoses for leaks. Replace or tighten radiator clamps and hoses as necessary (WP 0042 00).