TM 9-6115-730-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
(2) Disconnect engine harness connector ENG-P2 from ECM J2.
(3) Remove the suspect injector's supply wire and return wire from the ENG-
P2 connector. Connect the ENG-P2 connector. Refer to Figure 5.
(4) Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
(5) Perform the Injector Solenoid Test at least two times. Record the results.
NOTE
The Cat ET will report an OPEN for the injector that shares the supply with the suspect injector.
Disregard the result for this injector.
(6) If the Injector Solenoid Test indicates OPEN for the suspect cylinder, the
short circuit is in the engine harness. Repair the engine harness or
replace the engine harness, as required (WP 0088). Verify that the repair
eliminates the problem.
(7) If the Injector Solenoid Test indicates SHORT for the suspect cylinder,
there is a problem with the ECM. Replace the ECM (WP 0082). Verify
that the repair eliminates the problem.
STEP 12.
The Injector Solenoid Test reported that one or more cylinders are OPEN.
Record the cylinder numbers for the injectors that indicate OPEN.
a. On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
WARNING
A strong electrical shock hazard is present if the electrical power is not removed from the ECM.
The electronic unit injector system uses 90-120 volts. Failure to comply can cause injury or death
to personnel.
b. Disconnect connector ENG-P300 from injector harness ENG-J300 (Figure 5).
c.
Fabricate a jumper wire that is long enough to jumper two connector pins at
the connector for the injector harness. Crimp connector sockets to each end
of the jumper wire.
d. Insert one end of a jumper wire onto the pin of the supply wire of the suspect
injector (Table 3). Insert the other end of the jumper wire onto the pin of the
return wire of the suspect injector. For example, if injector 5 is the problem
injector, insert the jumper onto terminal 5 and into terminal 8 of the connector
for the injector harness. Ensure that the ends of the jumper wire are not in
contact with any of the other terminals in the connector.
e. Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
f.
Using the Cat ET, perform the Injector Solenoid Test at least two times.
0013-19
