Test Step 2. Inspect Electrical Connectors and Wiring -807640292

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TM 9-2320-312-24-2

Troubleshooting Section

D. Note the temperature for the sensor on the ET

Ensure that the repair eliminates the problem.

status screen .

STOP.

E. Start the engine but remain parked.

Test Step 2. Inspect Electrical Connectors

and Wiring.

F. Monitor the temperature for the sensor on the ET

status screen as the engine is warming.

A. Thoroughly inspect the following connectors:

Expected Result:

J2/P2 ECM engine harness connector

The temperature before starting the engine should

J1/P1 ECM vehicle harness connector

be within reasonable limits, and the temperature

increases as the engine warms.

connector terminals for the sensor

Note: The engine may require several hours to cool

down depending on the ambient air temperature

Refer to Troubleshooting, "Electrical Connectors

around the vehicle.

- Inspect" for details.

Results:

B. Perform a 45 N (10 lb) pull test on each of the

wires in the ECM connector that are associated

Yes The sensor is functioning correctly. If

with the appropriate diagnostic code.

a problem is still suspected the problem is a

mechanical problem. The problem is not an

C. Check the ECM connector (allen head screw) for

electronic problem.

the proper torque of 6.0 Nm (55 lb in).

Repair: Perform the following diagnostic

D. Check the harness and wiring for abrasion and

procedure:

pinch points from the appropriate sensor back

to the ECM.

Refer to Troubleshooting, "Troubleshooting without

a Diagnostic Code" for a procedure that best

Expected Result:

describes the conditions.

All connectors, pins and sockets should be

STOP.

completely coupled and/or inserted and the harness

and wiring should be free of corrosion, abrasion

No Proceed to Test Step 4.

or pinch points.

Test Step 4. Compare the Temperature

Choose the OK option in order to select the sensor

Reading to the Temperature from Another

that requires troubleshooting or select the NOT OK

Gauge.

option if the wiring is causing the problem.

Results:

A. Remove the temperature sensor from the engine.

OK Proceed to Test Step 3.

B. Connect the sensor to the engine harness. Hold

the sensor and the thermocouple probe from the

Not OK Repair the connectors or wiring and/or

6V-9130 Temperature Adapter in the air. Allow

replace the connectors or wiring. Ensure that all

three minutes for the sensor and the probe to

of the seals are properly in place and ensure that

respond to the temperature of the air.

the connectors are completely coupled. Verify

that the repair eliminates the problem. STOP.

C. The ET status screen will display the temperature

reading from the sensor. Compare the

Test Step 3. Check the Sensor in the

temperature reading to the temperature reading

Engine.

from the 6V-9130 Temperature Adapter.

A. Ensure that the temperature of the engine is cool

D. Hold the sensor and the thermocouple probe in

before starting this procedure.

your hand and check the temperatures again.

Do not expose the sensor to a flame.

B. Connect ET to the cab data link connector.

Expected Result:

C. Turn the ignition key switch to the ON position.

The two measurements are within 15 C (27 F) of

each other.