TM 10-3930-675-20-1
0017 00-7
ENGINE ELECTRONIC CONTROL UNIT (ECU) TROUBLESHOOTING - CONTINUED
0017 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
- Continued
b. Measure supply voltage out
of engine ECU actuator
port at pins 19 and 29 to
ground. Voltage should be
4.75-5.25V.
If voltage is not as specified,
replace engine ECU (WP 0078
00).
3. Place ignition switch to OFF
position
and
disconnect
sensor harness from engine
ECU.
a. Measure resistance from
sensor harness connector
pin 18 to all sensor harness
connector pins. Resistance
should be greater than 100k
ohms.
If engine harness requires
replacement, notify SRA.
b. Measure resistance from
sensor harness connector
pin 25 to all sensor harness
connector pins. Resistance
should be greater than 100k
ohms.
If engine harness requires
replacement, notify SRA.
c. Measure resistance from
sensor harness connector
pin 45 to all sensor harness
connector pins. Resistance
should be greater than 100k
ohms.
If engine harness requires
replacement, notify SRA.
>100K OHMS
USE TEST LEAD
KIT P/N 3822758