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 5. Disconnect sensor harness and
- Continued.
actuator harness from engine
ECU. Place ignition switch to
ON position.
a. Measure voltage between If voltage is not as specified,
engine ECU sensor port pin replace engine ECU (WP 0079
18, pin 25, pin 45, and 00).
ground. Voltage should be
4.75 to 5.25V.
b. Measure voltage between If voltage is not as specified,
engine ECU actuator port replace engine ECU (WP 0079
pin 19 and pin 29 and 00).
ground. Voltage should be
4.75 to 5.25V.
ACTUATOR PORT:
SENSOR PORT:
PINS 19 AND 29 TO ENGINE
PINS 18,25,45 TO ENGINE
BLOCK GROUND
BLOCK GROUND
4.75-5.25V
4.75-5.25V
USE TEST LEAD KIT P/N 3822917
0018 00-3
