TM 10-3930-675-20-1
0025 00-26
ENGINE BATTERY VOLTAGE CIRCUITS TROUBLESHOOTING - CONTINUED
0025 00
Table 7. Error Code 1598 - Voltage Monitor, Very Low Voltage Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1598 - Voltage Monitor, Very Low
Voltage Failure - Continued
5. Ensure that ignition switch is
in OFF position. Turn off
circuit breakers 51-F4 and 51-
F5. Disconnect OEM harness
from engine ECU.
a. Inspect
OEM
harness
connector on ECU side and
harness side for dirty,
corroded, bent, broken, and
pushed back or extended
pins.
Clean and repair connector as
required (WP 0111 00).
b. Check for dirt or moisture
in or on connectors and for
missing
or
damaged
connector seals.
Remove dirt and moisture from
connector. Replace missing or
damaged connector seals (WP
0111 00).
6. Place ignition switch in OFF
position and disconnect OEM
harness from engine ECU
(794). Perform the following
resistance checks.
If resistance is not as specified,
replace battery cables (WP 0108
00).
a. Measure resistance from
harness connector pin 7 to
positive
(+)
battery
terminal. Resistance should
be less than 10 ohms.
b. Measure resistance from
harness connector pin 8 to
positive
(+)
battery
terminal. Resistance should
be less than 10 ohms.
c. Measure resistance from
harness connector pin 17 to
positive
(+)
battery
terminal. Resistance should
be less than 10 ohms.