TM 9-6115-729-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
NOTE
The Air Inlet Heater Override has a one minute timer in order to disable the test when the time
expires.
e. Stop the Air Inlet Heater Override.
f.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
g. Fabricate a 4 inch jumper wire. Use the jumper wire to connect ENG-P101-1
and ENG-P101-2.
h. Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
i.
Start the Air Inlet Heater Override on the Cat ET.
j.
Verify the open circuit diagnostic code 617-E-05 changed to a short circuit
diagnostic code 617-E-06 when the control wires to the air inlet heater relay
were connected together.
k.
The diagnostic codes changing from short circuit code 617-E-06 to open
circuit code 617-E-05 and back to short circuit code 617-E-06 verifies that the
ECM is working properly.
l.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 8.
If the problem is not resolved, replace the air inlet heater relay (WP 0103).
a. Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
b. Recheck the system for active diagnostic codes.
c.
Verify that the repair eliminates the problem.
STEP 9.
If the problem is not resolved, check for battery voltage to the air inlet heater
a. On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
b. Remove the wire from the +battery side of the air inlet heater relay.
c.
Connect a voltmeter between the wire from the +battery side of the air inlet
heater relay and engine ground.
d. Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
0013-8
