STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 46
J1587 CODE:
P168 1 - BATTERY VOLTAGE LOW
NOTE - This chart is only to be used if:
1)
All basic mechanical checks and physical inspections have been performed with no problem found, and
2)
Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
46-1
Battery Check
Start and run engine for 1 minute.
Engine does not start.
Determine cause for no-start.
Measure voltage on Battery +
Start with an inspection of the
terminal (red lead) to Battery -
battery (possibly discharged)
terminal (black lead).
and/or starting/charging system.
Refer to Chart 2, page 3-345.63,
as a further aid in no-start
diagnosis
if battery and starting/charging
system are okay.
Less than or
Service discharged battery and/
equal to 10.0 volts.
or starting/charging system.
Greater than
Go to 46-2.
10.0 volts.
46-2
Voltage Check at
ECM
Keep engine running.
Less than or
Go to 46-3.
Select ECM INPUT VOLT
equal to 10.0 volts.
on DDR for display.
Observe ECM voltage reading on
Greater than
Go to 46-5.
DDR.
10.0 volts.
46-2
Voltage Check at
ECM
Turn ignition off.
Less than or
Go to 46-30.
Disconnect 5-way power
equal to 11.5 volts.
harness connector at the ECM.
Read voltage from socket A and
Greater than
Go to 46-5.
C of 5-way power harness
11.5 volts.
connector and a good battery
ground (black lead). Don't use
(ckt #150 as ground reference.
Change 3 3-345.339
