*ENGINE CRANKS BUT DOES NOT START

For a complete wiring diagram Refer to Section 8W.

Possible Causes

NO START PRE-TEST

POWERTRAIN FUSES OPEN

SECONDARY INDICATORS PRESENT

ENGINE MECHANICAL

(A209) FUSED B+ CIRCUIT OPEN OR SHORTED TO GROUND

(F342) FUSED ASD RELAY OUTPUT CIRCUIT OPEN

FUEL CONTAMINATION

Diagnostic Test

1. NO START PRE-TEST

NOTE: The following list of items must be checked before continuing with any no start tests.

The battery must be fully charged and in good condition. A low charged battery may produce invalid test results. If the battery is low, charge the battery and then attempt to start the vehicle by cranking the engine for 15 seconds, 3 consecutive times.
This will allow any DTCs to set that may have been erased due to a dead battery.
Try to communicate with PCM if not able to communicate check fuses.
Make sure the Powers and Ground to the PCM are OK.
Make sure the PCM communicates with the scan tool and that there are no DTCs stored in the PCM memory. If the PCM reports a No Response condition, refer to section 8 Electrical Electronic Control Module Electrical Diagnostics for the proper tests.
Read the PCM DTCs with the scan tool . If any DTCs are present, they must be repaired before continuing with any other No Start diagnostic tests. Refer to the Table of Contents for the related P-code that is reported by the PCM.
Make sure that the Bus is functional. Attempt to communicate with the Instrument Cluster and VTSS, If you are unable to establish communications refer to 8 Electrical Electronic Control Module Electrical Diagnostics for the proper Diagnostic procedures.
The Sentry Key Immobilizer System must be operating properly. Check for proper communication with the scan tool and check for DTCs that may be stored in the Sentry Key Immobilizer Module (SKREEM). Repair the DTC(s) before continuing.
If no DTCs are found, using the scan tool, select Clear PCM (BATT Disconnect).
Crank the engine several times. Using the scan tool, View DTCs. If a DTC is present perform the DTC diagnostics before continuing.

Were any problems found?

Yes

Repair as necessary.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

Go To 2

2. OPEN FUSE

Check for any open fuses in the TIPM or Junction Block that may be related to the No Start condition.

Are any of the fuses open?

Yes

Replace the open fuse and check the related circuit(s) for a short to ground.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

Go To 3

3. SECONDARY INDICATORS PRESENT

Ignition on, engine not running.
With the scan tool, under DTCs & Related Functions, read the Secondary Indicators while cranking the engine.

Are there any Secondary Indicators present while cranking the engine?

Yes

Refer to the Engine Electrical Diagnostics group and perform the tests related to the secondary indicator that is reported by the scan tool.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

Go To 4

4. ENGINE MECHANICAL

Check for any of the following conditions/mechanical problems.
ENGINE VALVE TIMING - must be within specifications, check for broken timing components
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.

Are there any engine mechanical problems?

Yes

Repair as necessary.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

Go To 5

5. (A209) FUSED B+ CIRCUIT CHECK

Turn the ignition off.
Disconnect the C1 PCM harness connector.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Using a 12-volt test light connected to ground probe the (A209) Fused B+ circuits.

Does the test light illuminate brightly?

Yes

Go To 6

No

Repair the open or short to ground in the (A209) Fused B+ circuit between the TIPM and PCM.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

6. (F342) FUSED ASD RELAY OUTPUT CIRCUIT OPEN

Disconnect the C5 TIPM harness connector
Disconnect the C3 PCM harness connector.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (F342) ASD Relay Output circuit from the C5 TIPM harness connector to the appropriate terminals of special tool #8815, Ignition coil, and the Fuel injectors.

Is the resistance below 5.0 ohms for each measurement?

Yes

Go To 7

No

Repair the open in the (F342) Fused ASD Relay Output circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

7. FUEL PUMP DELIVERY

Verify that the Fuel tank is not empty before continuing.
Follow the diagnostics for Checking Fuel Delivery in the Driveability section of this manual.

Was the No Start condition solved after following the above diagnostic test?

Yes

Test Complete.

Check for contamination/water in the fuel. Make sure the fuel being used in this vehicle meets manufactures Fuel Requirement, refer to the service manual.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)