P168 1 - BATTERY VOLTAGE LOW

TM 9-2320-364-20-1

2-14. DDEC III/IV TROUBLESHOOTING (CONT).

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

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/IV was started at step START-1, pg 2-539, and you have now been referred here.

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

46-1

Battery Check

Start and run (TM 9-2320-364-10)

Engine does not start.

Determine cause for no-start.

engine for 1 minute.

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 2-557,

as a further aid in no-start

diagnosis if battery and starting/

charging system are okay.

Less than or

Service discharged battery

equal to 10.0 volts.

(TM 9-6140-200-14) and/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 VOLTS

equal to 10.0 volts.

on DDR for display.

Observe ECM voltage reading on

Greater than

Go to 46-5.

DDR.

10.0 volts.

46-3

Voltage Check at ECM

Turn ignition off.

Less than or

Go to 46-4.

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.

2-719