P110 3 - COOLANT TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH) OR P175 3 - OIL TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH) (CONT) -726280703

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

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

OR:

P175 3 - OIL TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH)

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

14-5

Check for Short to

+5 Volt Line

Turn ignition off.

Less than or equal to

Signal line (ckt #120) is shorted

Remove jumper wire.

10,000 ohms.

to the engine +5 volt line (ckt

Disconnect the engine harness

#416), and/or (ckt #120) signal

connector at the ECM.

line is shorted to ground and/or

Read resistance between sockets

sensor return (ckt #452). Repair

R2 (ckt #120) and W1 (ckt #416)

short. Then go to 14-30.

on the engine harness connector.

Greater than 10,000

Go to 14-7.

ohms or open.

14-6

Check CTS

Connectors

Inspect terminals at the

Terminals and

Replace CTS (para 7-69).

CTS connector (both the sensor

connectors are okay.

Then go to 14-30.

and harness side) for damage;

bent, corroded, and unseated

Problem found.

Repair terminals/connectors

pins or sockets.

(para 7-101). Then go to 14-30.

14-7

Check OTS

Connectors

Inspect terminals at the OTS

Terminals and

Replace OTS (para 7-70).

connector (both the sensor

connectors are okay.

Then go to 14-30.

and harness side) for damage;

bent, corroded, and unseated

Problem found.

Repair terminals/connectors

pins or sockets.

(para 7-101). Then go to 14-30.

14-8

Open Line Check

Turn ignition off.

Less than or

Go to 14-10.

Disconnect the engine harness

equal to 5 ohms.

connector at the ECM.

Read resistance between sockets

Greater than

Signal line (ckt #133) or return

P3 (ckt #133) and Y2 (ckt #452)

5 ohms or open.

line (ckt #452) is open.

on the engine harness connector.

Repair open. Then go to 14-30.

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