P110 3 - COOLANT TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH) OR P175 3 - OIL TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH)

TM 9-2320-364-20-1

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

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

P110 3 - COOLANT TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH)

(BELOW)

OR: P175 3 - OIL TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH) (BELOW)

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

14-1

Code Check

Turn ignition on.

Plug in DDR and determine which

PID 110 - FMI 3

Go to 14-2.

code is present.

PID 175 - FMI 3

Go to 14-3.

14-2

Coolant Temp Sensor

Check

Turn ignition off.

Code 110/4 (or any codes

Go to 14-4.

Disconnect CTS (para 7-69)

except Code 110/3).

and install a jumper between

the CTS connector sockets

Anything except

Go to 14-8.

A and B.

Code 110/4.

Turn ignition on.

Read active codes.

14-3

Oil Temp Sensor

Check

Turn ignition off.

Code 175/4 (or any codes

Go to 14-5.

Disconnect OTS (para 7-70) and

except Code 175/3).

install jumper between OTS

connector sockets A and B.

Anything except

Go to 14-9.

Turn ignition on.

Code 175/4.

Read active codes.

14-4

Check for Short to

+5 Volt Line

Turn ignition off.

Less than or equal to

Signal line (ckt #133) is shorted

Remove jumper wire.

10,000 ohms.

to the engine +5 volt line (ckt

Disconnect the engine harness

#416), and/or (ckt #133) signal

connector at the ECM.

line is shorted to ground, and/or

Read resistance between sockets

sensor return (ckt #452).

P3 (ckt #133) and W1 (ckt #416)

Repair short. Then go to 14-30.

on the engine harness connector.

Greater than 10,000

Go to 14-6.

ohms or open.

2-631