TM 10-3930-675-24-1
ENGINE ELECTRONIC CONTROL UNIT (ECU) (794) TROUBLESHOOTING - CONTINUED
0018 00
Table 1. Error Code 1187 - Sensor Voltage Supply Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1187 - Sensor Voltage Supply Failure 6. Place ignition switch in OFF
- Continued.
position. Disconnect sensor
harness and actuator harness
from engine ECU.
a. Measure resistance from If engine harness requires
sensor harness connector replacement, notify Sustainment
pins 18, 25, and 45 to engine Maintenance.
block ground. Resistance
should be greater than 100k
Ohms.
b. Measure resistance from If engine harness requires
actuator harness connector replacement, notify Sustainment
pins 19 and 29 to engine Maintenance.
block ground. Resistance
should be greater than 100k
Ohms.
SENSOR HARNESS:
ACTUATOR HARNESS:
PINS 18,25,45 TO ENGINE
PINS 19 AND 29 TO ENGINE
BLOCK GROUND
BLOCK GROUND
>100K OHMS
>100K OHMS
USE TEST LEAD KIT P/N 3822758
7. Place ignition switch in OFF
position. Disconnect sensor
harness and actuator harness
from engine ECU. Disconnect
oil
pressure/temperature
sensor and coolant level sensor
0018 00-4
