TM 9-6115-729-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
MALFUNCTION
Cat Data Link Circuitry Short Circuit.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Disconnect ENG-P1 harness connector from ECM connector J1.
STEP 3.
Measure the resistance between ENG-P1 harness connector pin 8 and all other
connector pins. All measurements should indicate open, if not repair or replace
harness (WP 0090).
STEP 4.
Measure the resistance between ENG-P1 harness connector pin 9 and all other
connector pins. All measurements should indicate open, if not repair or replace
harness (WP 0090).
STEP 5.
Verify the problem has been resolved.
MALFUNCTION
Cat Data Link Circuitry Open Circuit.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Disconnect harness connector P7 from GSC connector J7.
STEP 3.
Install a jumper wire between Cat data link harness connector CDC - P7 pins D
and E.
STEP 4.
Measure the resistance between ENG-P1 harness connector pins 8 and 9. All
measurements should indicate a short, if not repair or replace harness
STEP 5.
Measure the resistance between ENG-P37 harness connector pins 19 and 20.
All measurements should indicate a short, if not repair or replace harness
STEP 6.
Measure the resistance between P7 GSC harness connector pins 19 and 20.
All measurements should indicate a short, if not repair or replace harness
STEP 7.
Remove jumper wire.
STEP 8.
Verify the problem has been resolved.
0011-48
