TM 10-3930-675-20-1
0017 00-4
ENGINE ELECTRONIC CONTROL UNIT (ECU) TROUBLESHOOTING - CONTINUED
0017 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
- Continued
6. Place ignition switch to OFF
position. Disconnect sensor
harness and actuator harness
from engine ECU.
a. Measure resistance from
sensor harness connector
pins 18, 25, and 45 to engine
block ground. Resistance
should be greater than 100k
ohms.
If
engine
harness
requires
replacement, notify SRA.
b. Measure resistance from
actuator harness connector
pins 19 and 29 to engine
block ground. Resistance
should be greater than 100k
ohms.
If
engine
harness
requires
replacement, notify SRA.
7. Place ignition switch to OFF
position. Disconnect sensor
harness and actuator harness
from engine ECU. Disconnect
oil pressure/temperature sensor
and
coolant
level
sensor
jumpers.
USE TEST LEAD KIT P/N 3822758
SENSOR HARNESS:
PINS 18,25,45 TO ENGINE
BLOCK GROUND
ACTUATOR HARNESS:
PINS 19 AND 29 TO ENGINE
BLOCK GROUND
>100K OHMS
>100K OHMS