TM 9-2320-302-20 0006 00-1 ENGINE TROUBLESHOOTING 0006 00 Table 1. Engine Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1.  Engine Fails to Crank or Cranks Slowly. 1.  Check   for   damaged   or   loose battery connections. Tighten or repair battery connec- tions as required (WP 0115 00). 2.  Check   battery   voltage.   22-26 volts are required. If    voltage    is    below    22    volts, service    batteries    (TM    9-6140- 200-14). 3.  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 4 and read Active Flash Codes. b. If CEL comes on for up to 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 faults code system 10.4 (WP 0007 00). 4.  Connect Diagnostic Data Reader   (DDR)   to   Diagnostic Data Link (DDL) connector. Perform DDEC system diagnostic troubleshooting.  Refer  to  section number  that  matches  flash  code logged (WP 0007 00). 2.  Engine Does Not Crank. 1.  Check   for   damaged   or   loose battery connections. Tighten or repair battery connec- tions as required (WP 0115 00). 2.  Check   battery   voltage.   22-26 volts are required. If    voltage    is    below    22    volts, service batteries (see TM 9-6140- 200-14). 3.  Check electrical connections at the starter motor. Tighten  or  repair  connections  as required (WP 0056 00). 4.  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 5 and read Active Flash Codes. b. If CEL comes on for up to five seconds and then turns off, perform step 5 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).