TM 10-3930-675-24-1
ENGINE ELECTRONIC CONTROL UNIT (ECU) (794) TROUBLESHOOTING - CONTINUED
0018 00
Table 2. Error Code 1227 - Sensor Voltage Supply Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1227 - Sensor Voltage Supply Failure
b. Measure supply voltage out If voltage is not as specified,
of engine ECU actuator port replace engine ECU (WP 0079
- Continued.
at pins 19 and 29 to ground. 00).
Voltage should be 4.75 to
5.25V.
3. Place ignition switch in OFF
position and disconnect sensor
harness from engine ECU.
a. Measure resistance from If engine harness requires
sensor harness connector pin replacement, notify Sustainment
18 to all sensor harness Maintenance.
connector pins. Resistance
should be greater than 100k
Ohms.
b. Measure resistance from If engine harness requires
sensor harness connector pin replacement, notify Sustainment
25 to all sensor harness Maintenance.
connector pins. Resistance
should be greater than 100k
Ohms.
c. Measure resistance from If engine harness requires
sensor harness connector pin replacement, notify Sustainment
45 to all sensor harness Maintenance.
connector pins. Resistance
should be greater than 100k
Ohms.
USE TEST LEAD
>100K OHMS
KIT P/N 3822758
0018 00-7
