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.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1227 - Sensor Voltage Supply Failure. 1. Place ignition switch in OFF
position and disconnect sensor
harness connector from engine
ECU.
a. Inspect engine harness and Clean and repair connector(s) as
sensor connector for dirty, required (WP 0113 00).
corroded, bent, broken,
pushed back, and extended
pins.
b. Check engine harness and
Remove dirt and moisture from
engine ECU connector for
connector. Replace missing or
damaged connector seals (WP
dirt or moisture in or on
0113 00).
connector and for missing or
damaged connector seals.
2. Disconnect sensor harness and
actuator harness from engine
ECU. Place ignition switch to
ON position.
a. Measure supply voltage out If voltage is not as specified,
of engine ECU sensor port at replace engine ECU (WP 0079
pins 18, 25, and 45 to 00).
ground. Voltage should be
4.75 to 5.25V.
4.75-5.25V
4.75-5.25V
SENSOR
PORT
ACTUATOR
PORT
USE TEST LEAD KIT P/N 3822917
0018 00-6
