TM 10-3930-675-20-1
0017 00-3
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
5. Disconnect sensor harness
and actuator harness from
engine ECU. Place ignition
switch to ON position.
a. Measure voltage between
engine ECU sensor port pin
18, pin 25, pin 45, and
ground. Voltage should be
4.75-5.25V.
If voltage is not as specified,
replace engine ECU (WP 0078
00).
b. Measure voltage between
engine ECU actuator port
pin 19 and pin 29 and
ground. Voltage should be
4.75-5.25V.
If voltage is not as specified,
replace engine ECU (WP 0078
00).
USE TEST LEAD KIT P/N 3822917
ACTUATOR PORT:
PINS 19 AND 29 TO ENGINE
BLOCK GROUND
SENSOR PORT:
PINS 18,25,45 TO ENGINE
BLOCK GROUND
4.75-5.25V
4.75-5.25V