TM 10-3930-675-20-1
0017 00-22
ENGINE ELECTRONIC CONTROL UNIT (ECU) TROUBLESHOOTING - CONTINUED
0017 00
Table 6. Error Code 1443 - Throttle Voltage Supply Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1443 - Throttle Voltage Supply
Failure
1. Place ignition switch to OFF
position. Disconnect OEM
harness
connector
from
engine ECU.
Remove any extra wires and
connect to (+) 12V supply.
a. Inspect engine harness and
sensor connector for dirty,
corroded, bent, broken,
pushed back, and extended
pins.
Clean and repair connector(s) as
required (WP 0111 00).
b. Check engine harness and
engine ECU connector for
dirt or moisture in or on
connector and for missing
or
damaged
connector
seals.
Remove dirt and moisture from
connector. Replace missing or
damaged connector seals (WP
0111 00).
2. Disconnect OEM harness
connector from engine ECU.
Place ignition switch in ON
position.
3. Measure supply voltage from
ECU OEM port pin 48 to
engine block ground. Voltage
should be 4.75-5.25V.
a. If voltage is not as specified
replace engine ECU (WP
0078 00).
b. If voltage is as specified,
proceed with the following
steps.
4.75-5.25V
48
USE TEST LEAD
KIT P/N 3822917
