TM 9-6115-729-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
STEP 3.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 4.
Start the Air Inlet Heater Override on the Cat ET.
a. Check for active diagnostic codes by selecting Diagnostics from the top of
the ET screen.
b. Look for Diagnostic Code 617-E-05. Code 617-E-05 indicates the ECM
detects an open circuit between the air inlet heater relay and the ECM.
NOTE
Do not leave the Air Inlet Heater Override ON. Avoid unnecessary cycling of the air inlet heater in
order to prevent the battery from discharging. The Air Inlet Heater Override has a one minute
timer that disables the test when the time expires.
STEP 5.
Stop the Air Inlet Heater Override.
STEP 6.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 7.
Check for an open circuit in the air inlet heater relay control circuit.
a. Disconnect harness connector ENG-P101 (Figure 2, Item 1) from the air inlet
heater relay connector (Figure 2, Item 2).
b. Connect a voltmeter to pins 1 and 2 of harness connector ENG-P101. Refer
to WP 0090 for connector pin-outs.
c.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
d. Start the Air Inlet Heater Override on Cat ET and observe the voltmeter.
(1) If +24 +/- 3.0 Vdc is present and code 617-E-05 is still active, replace the
air inlet heater relay.
(2) If +24 +/- 3.0 Vdc is not present and code 617-E-05 is still active, the
ECM may be defective.
0013-3
