Table 2-16. DDEC II System Fault Index

TM 9-2320-364-20-1

2-13. DDEC II TROUBLESHOOTING.

NOTE

Ensure that wire connections 150/150 on battery A1 ground terminal, and wire

connections 240/241 on battery A1 positive terminal are tight and free of corrosion

before starting to troubleshoot DDEC II system. Refer to Para 7-90 and 7-91 and

tighten/clean any loose or corroded wire connections.

This paragraph covers DDEC II System Troubleshooting. The DDEC II System Fault Index, Table 2-16, lists faults for the

DDEC II system of the PLS truck. Refer to schematic Figure 2-1 through 2-4 when performing tests and corrective actions.

Table 2-16. DDEC II System Fault Index

Fault

No.

Troubleshooting Fault

Page

CHECK ENGINE LIGHT (CEL) COMES ON AND STAYS ON

2-148

.................................

Check Engine Light (CEL) ON And No Historical Or Active Codes

Displayed On DDR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-150

DDR Display Reads "No DDEC Data Received" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-156

DDR Display Is Blank Or Random . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-164

DDR Reads Active Codes And Does Not Read Any Historic Codes

FLASH CODES:

SAE CODES:

CODE 11

P187 4

Vernier Control Signal Voltage Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-172

CODE 12

P187 3

Vernier Control Signal Voltage High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-192

CODE 14

P175 3/P110 3

Oil Temperature Sensor (OTS) Signal Voltage High . . . . . . . . . . . . . .

2-202

CODE 15

P175 4/P110 4

Oil Temperature Sensor (OTS) Signal Voltage Low . . . . . . . . . . . . . .

2-210

CODE 21

P091 3

Throttle Position Sensor (TPS) Signal Voltage High . . . . . . . . . . . . . .

2-218

CODE 22

P091 4

Throttle Position Sensor (TPS) Signal Voltage Low . . . . . . . . . . . . . .

2-230

CODE 23

P174 3

Fuel Temperature Sensor (FTS) Signal Voltage High . . . . . . . . . . . .

2-244

CODE 24

P174 4

Fuel Temperature Sensor (FTS) Signal Voltage Low . . . . . . . . . . . . .

2-252

CODE 32

DDEC ECM Backup System Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-260

CODE 33

P102 3

Turbo Boost Sensor (TBS) Signal Voltage High . . . . . . . . . . . . . . . . . . .

2-264

CODE 34

P102 4

Turbo Boost Sensor (TBS) Signal Voltage Low . . . . . . . . . . . . . . . . . . . .

2-274

CODE 35

P100 3

Oil Pressure Sensor (OPS) Signal Voltage High . . . . . . . . . . . . . . . . . . .

2-286

CODE 36

P100 4

Oil Pressure Sensor (OPS) Signal Voltage Low . . . . . . . . . . . . . . . . . . . .

2-296

CODE 41

S021 0

Timing Reference Sensor (TRS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-312

CODE 42

S021 1

Synchronous Reference Sensor (SRS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-322

CODE 44

P175 0/P110 0

High Oil Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-332

CODE 45

P100 1

Low Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-334

CODE 46

P168 1

Low Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-336

CODE 51

Electrically Erasable Programmable Read-Only Memory

(EEPROM) Failure (Historical Code 51 On DDR) . . . . . . . . . . . . . . . .

2-348

CODE 52/56

S254 12/S250 12 DDEC ECM - Analog to Digital Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-350

CODE 53

S253 12

Electrically Erasable Programmable Read-Only

Memory (EEPROM) Failure Affecting Code Memory . . . . . . . . . .

2-352

CODES 61-68 SXXX 0

Injector Response Time Too Long . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-354

CODES 71-78 SXXX 1

Injector Response Time Too Short . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-376

A5A Vehicle Harness +5 Volt Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-382

A5B

Engine Harness +5 Volt Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-400

2-142