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Page Title:
P168 1 - BATTERY VOLTAGE LOW (cont) |
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 TM 9-2320-364-20-1
Section IV. TROUBLESHOOTING CHARTS (Cont.)
E. FLASH CODE:
46
J1587 CODE:
P168 1 - BATTERY VOLTAGE LOW
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
46-4
Check for Bad Battery
+ Line
Pull out both DDEC circuit breaker
Less than or
The Battery + line near
buttons (CB22 and CB23).
equal to 11.5 volts on
Battery is open, or a corroded
Read voltage between battery
either reading.
connection exists at Battery +
side (hot side) of DDEC circuit
terminal. Repair problem.
breaker CB22 (red lead) and good
Then go to 46-30.
ground (black lead).
Repeat voltage reading at
Greater than
The Battery + line between the
other DDEC circuit breaker
11.5 volts on both
DDEC circuit breaker and ECM
CB23.
readings.
has an open, or 5-way power
harness connector has a
corroded connection. Repair
problem. Then go to 46-30.
46-5
Ground Check at ECM
Disconnect the 5-way power
Less than or
The ground wire (ckt #150) is
harness connector at ECM (if
equal to 11.5 volts on
open or has a corroded
you have not previously done so).
either reading.
connection. Repair ground wire.
Read voltage on socket C
Then go to 46-30.
of 5-way power harness connector
(red lead) to socket (black lead).
Greater than
Go to 46-6.
Also read voltage on socket A (red
11.5 volts on both
lead) to socket D (black lead).
readings.
46-6
Check ECM Connectors
Check terminals at 5-way
Terminals and
Replace ECM (para 7-57). Then
power harness connector (both
connectors are okay.
go to 46-30.
the ECM and harness side) for
damage; bent, corroded, and
Problem found.
Repair terminals/connectors
unseated pins or sockets.
(para 7-101). Then go to 46-30.
2-721
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