P110 4 - COOLANT TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE) OR P175 4 - OIL TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)

TM 9-2320-364-20-1

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

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

P110 4 - COOLANT TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)

OR:

P175 4 - OIL TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)

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

15-1

Code Check

Turn ignition on.

Plug in DDR and determine which

PID 110 - FMI 4

Go to 15-2.

code is present.

PID 175 - FMI 4

Go to 15-3.

NOTE: If any of the following SAE J1587 Codes are also present go to ENG5V-1(page 2-761): 110/3,

174/3, 174/4, 187/4, 91/4, 100/4, 102/4, and 102/3.

15-2

Coolant Temp Sensor

Check

Turn ignition off.

Any codes

Go to 15-4.

Disconnect CTS connector

except Code 110/4.

(para 7-69).

Start engine and run until "Check

Engine" light comes on or after

Code 110/4 (and

Go to 15-6.

8 minutes.

any other codes).

Read active codes with engine

still running.

15-3

Oil Temp Sensor

Check

Turn ignition off.

Any codes

Go to 15-5.

Disconnect OTS harness

except Code 175/4.

connector (para 7-70).

Start engine and run

(TM 9-2320-364-10) until

Code 175/4 (and

Go to 15-7.

"Check Engine" light comes on or

any other codes).

after 8 minutes.

Read active codes with engine still

running.

15-4

Check CTS

Connectors

Inspect terminals at the CTS

Terminals and

Replace CTS (para 7-69).

connector (both the sensor

connectors are okay.

Then go to 15-30.

and harness side) for damage;

bent, corroded, and unseated

Problem found.

Repair terminals/connectors

pins or sockets.

(para 7-101). Then go to 15-30.

2-637