Test Step 3. Engine Cranks but Will not Start

299

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 3. Engine Cranks but Will not

No The oil pressure is below 27.5 MPa

Start

(4000 psi). Proceed to Test Step 5.

Test Step 5. Install a Test Plug and Check

Your answers indicated that your engine oil level is

the Oil Pressure

satisfactory. Do not replace the Injection Actuation

Pressure Sensor (IAP Sensor) at this time.

A. Remove the Injection Actuation Pressure Control

A. Connect the electronic service tool to the engine.

Valve (IAPCV).

Observe the "Injection Actuation Pressure" and

"Engine RPM" when the engine is cranking.

B. Install a 219-2368 Plug and 9X-1484 Seal Kit

and perform the pressure test.

Record the actual Injection

________________

Actuation Pressure.

Observed pressure reading

________________

Note: If the 219-2368 Plug is not available, proceed

Record the observed engine

________________

to Test Step 6.

speed.

Expected Result:

The oil pressure is above 27.5 MPa (4000 psi).

The injection actuation pressure is above 6 MPa

(870 psi).

Results:

Yes The oil pressure is above 27.5 MPa

Yes The injection actuation pressure is above

(4000 psi). The HEUI pump is OK.

6 MPa (870 psi).

Repair: Replace the IAPCV and check the oil

pressure. If the problem continues contact

Repair: The HEUI system is functioning correctly.

technical support.

Refer to Troubleshooting , "Engine Cranks but Will

Not Start" which is located in the "Troubleshooting

without a Diagnostic Code" section.

STOP.

No The oil pressure is below 27.5 MPa

STOP.

(4000 psi). Proceed to Test Step 7.

No The injection actuation pressure is below

Test Step 6. Install a New IAPCV and

6 MPa (870 psi). Proceed to Test Step 4.

Check the Oil Pressure

Test Step 4. Check the Oil Pressure

Note: Use this Test Step ONLY if the 219-2368

Disconnect the high pressure oil line from the

Plug is not available.

cylinder head and install the 8T-0852 Pressure

Gauge. Crank the engine and record the oil

A. Remove the IAPCV.

pressure.

B. Install a new IAPCV and check the oil pressure.

Note: The pressure readings may vary between

gauges.

Observed pressure reading

________________

Observed pressure reading

Expected Result:

________________

Observed RPM

The oil pressure is above 27.5 MPa (4000 psi).

________________

Observed "Injection Actuation

Results:

________________

Output Percent"

Yes The problem has been resolved. STOP.

Expected Result:

No Remove the new IAPCV and reinstall the

The oil pressure is above 27.5 MPa (4000 psi).

original IAPCV. Proceed to Test Step 7.

Test Step 7. Check the Drive Gear

Results:

Yes The oil pressure is above 27.5 MPa

A. Remove the high pressure oil pump.

(4000 psi). Proceed to Test Step 8.