TROUBLESHOOTING INSTRUCTIONS (CONT). -726280174

TM 9-2320-364-20-1

2-11. TROUBLESHOOTING INSTRUCTIONS (CONT).

(c)

Jumper Wires: Use to bypass a circuit and to insert between special connectors. This will permit

access to the connector terminals for circuit checking.

(d)

Diagnostic Data Reader (DDR) PRO LINK 9000: J38500-203.

(4)

Reading diagnostic codes. If you have turned to this instruction to begin diagnosis of a problem and

already know how to read, as well as understand Active and Historical codes, go to DDEC II

Troubleshooting (All Conditions) and begin DDEC Troubleshooting.

(5)

DDEC mode descriptions. Table 2-13 lists and describes each DDR mode.

(6)

Flashing DDEC codes. DDEC troubleshooting procedures are designed to be performed with the DDR.

In situations where a DDR is not available, DDEC codes can be read by flashing them on the CEL. For

example, codes 13 and 23 will be flashed as follows:

(a)

Turn OFF ENGINE switch (TM 9-2320-364-10).

(b)

Place a jumper wire between wires 435 and 451 on DDL connector MC13, terminals A and M.

(c)

Turn ON ENGINE switch, observe the CEL and record the codes being flashed.

(d)

The CEL will flash once for the one in the number 13 and pause for about a half a second.

(e)

Then the CEL will flash three times for the three in the number 13 and pause for about three

seconds.

(f)

After the three second pause, the CEL will flash two times for the two in the number 23 and pause

for about a half of a second.

(g)

After the half second pause, the CEL will flash three times for the three in the number 23.

(h)

The CEL will continue to flash in this manner until all of the DDEC codes in the DDEC ECM

memory are displayed.

(i)

Turn OFF the ENGINE switch when all of the DDEC codes are flashed.

(j)

Remove the jumper wire.

(k)

Proceed to DDEC Troubleshooting (Para 2-13) and the first code flashed by the CEL.

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