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. The voltmeter will only be active while the override is active.
e. On Cat ET, 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.
STEP 8.
Temporarily connect a spare ECM.
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.
If the problem is resolved with the spare ECM, reconnect the suspect ECM.
d. If the problem returns with the suspect ECM, replace the ECM (WP 0084).
e. 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. Connect a voltmeter between the wire from the +battery terminal of the air
inlet heater relay and engine ground (Figure 1).
