TM 10-3930-675-24-1
ENGINE ELECTRONIC CONTROL UNIT (ECU) (794) TROUBLESHOOTING - CONTINUED
0018 00
Table 5. Error Code 1443 - Low Voltage Detected at Throttle
Position Sensor Circuit Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1443 - Low Voltage Detected at 6. Check
for
resistance. a. If resistance is not as specified,
Throttle Position Sensor Circuit - Continued.
Disconnect connector X690
replace accelerator pedal
and inspect for damage. Check
assembly (WP 0062 00).
resistance on the accelerator b. Repair or replace damaged
pedal part of connector X690
connector (WP 0113 00).
between pins 4 and 5. Check
each pin for continuity to
ground. There should be a
resistance of 2,000 to 3,000
Ohms and no continuity to
ground (WP 0048 00-11).
7. Check continuity of the a. If continuity to ground is
accelerator pedal part of
found, replace accelerator
connector X690 between pin 5
pedal assembly (WP 0062 00).
and ground and pin 6 and b. If continuity to ground is not
ground. There should not be
found, check continuity and
continuity to ground (WP 0048
for continuity to ground for
00-11).
wires 233, 234, and 235 (WP
0048 00-11).
c. Repair or replace damaged
connector (WP 0113 00).
d. Replace damaged, open,
shorted, or grounded X690 to
X23 wiring harness (WP 0113
00).
8. Remove the engine cover (WP a. Clean and repair connector as
0148 00). Disconnect the OEM
required (WP 0113 00).
harness connector from ECU b. Replace damaged ECU (794)
(794) (WP 0080 00). Inspect
(WP 0080 00).
the OEM harness connector
and ECU pins for damage, dirt,
or corrosion.
9. Inspect connector X16 for a. If voltage (4.75V to 5.25V) is
damage. Disconnect connector
not as specified, continue with
X16. Turn the ignition ON and
step 10.
check for voltage at connector b. Repair or replace damaged
X16 between pin 4 and ground
connector (WP 0113 00).
should be 4.75V to 5.25V at
each pin.
0018 00-18
