START - FIRST CHART FOR DIAGNOSIS OF DDEC III/IV USING DDR

TM 9-2320-364-20-1

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

Section IV. TROUBLESHOOTING CHARTS (Cont.)

C. START - FIRST CHART FOR DIAGNOSIS OF DDEC III/IV USING DDR

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

START-1

Note "Check

Engine/Check

Gauges" Light

Turn ignition on while at the same

Light or lights

Go to START-2.

time observing the "Check Engine/

comes on and stays on.

Check Gauges" lights (engine not

running).

Lights come

Go to START-3.

on for up to 5 seconds,

then goes out.

Lights are off.

Go to Chart 4, page 2-579.

Erratic or

Go to START-7.

intermittent light.

START-2

Read Active

Codes Using DDR

Plug DDR into the

Active codes

Follow appropriate diagnostic

DDL connector.

(other than "NO CODES")

charts for code(s) received.

on DDR.

(See Table 2-19).

Read active codes by selecting the

DIAGNOSTIC CODE MENU

(ACTIVE CODES) on the DDR.

No active code.

Go to Chart 5, page 2-585.

DDR display reads

Go to START-6.

"NO DATA

RECEIVED FROM

SYSTEM" or "DDEC

SYSTEM NOT

RESPONDING".

DDR display is

Go to START-9.

blank or random.

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