START - FIRST CHART FOR DIAGNOSIS OF DDEC-III USING DDR (cont)

DIAGNOSTIC CONNECTOR - TM-9-2320-363-20-1_571

DIAGNOSTIC CONNECTOR - TM-9-2320-363-20-1_573

TM-9-2320-363-20-1 Truck Tractor Line Haul: 52 000 GVWR 6x4 M915A2 (NSN 2320-01-272-5029) Manual
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STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS C. START - FIRST CHART FOR DIAGNOSIS OF DDEC-III USING DDR (Cont'd) START-5 Read All Codes Again Read inactive codes Any codes. Follow appropriate diagnostic on DDR chart for codes received. (See Table of Contents). DDR display reads Go to Chart 7, page 3-345.99. "NO DATA BEING RECEIVED FROM DATA LINK” or "DDEC SYSTEM NOT RESPONDING". DDR display is Go to START-9. blank or random. START-6 Read Codes on the "Check Engine" Light Unplug the DDR. Flashes out To diagnose codes, follow Ignition on. codes. appropriate diagnostic chart for Engine not running. codes received. Depress and Hold. To service DDR system, go to Diagnostic Request Switch. C7-4, page 3-345.101. Read codes flashing out on the "Check Engine" Light. Does not flash Go to Chart 9, page 3-345.111. out codes. START-7 Intermittent Check Engine Light Note whether flashing "Check Flashing a Go to START-8 . Engine" Light Is reading a valid valid code. code or if it's just erratic. Erratic or Go to Chart 1, page 3-345.57. intermittent "Check Engine" light. Change 3 3-345.45

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